COACE Chemical Company Limited

COACE Chemical Company Limited Specialized in Grafted Polymers. Compatibilizer & Impact modifier.

PET in its most stable state is a colorless, semi-crystalline resin. However it is intrinsically slow to crystallize com...
07/09/2023

PET in its most stable state is a colorless, semi-crystalline resin. However it is intrinsically slow to crystallize compared to other semicrystalline polymers. Depending on processing conditions it can be formed into either amorphous or crystalline articles. Its amenability to drawing makes PET useful in fibre and film applications. Like most aromatic polymers, it has better barrier properties than aliphatic polymers. It is strong and impact-resistant. PET is hygroscopic.

About 60% crystallization is the upper limit for commercial products, with the exception of polyester fibers. Transparent products can be produced by rapidly cooling molten polymer below Tg glass transition temperature to form an amorphous solid. Like glass, amorphous PET forms when its molecules are not given enough time to arrange themselves in an orderly, crystalline fashion as the melt is cooled. At room temperature the molecules are frozen in place, but, if enough heat energy is put back into them by heating above Tg, they begin to move again, allowing crystals to nucleate and grow. This procedure is known as solid-state crystallization.

When allowed to cool slowly, the molten polymer forms a more crystalline material. This material has spherulites containing many small crystallites when crystallized from an amorphous solid, rather than forming one large single crystal. Light tends to scatter as it crosses the boundaries between crystallites and the amorphous regions between them, causing the resulting solid to be translucent.

Orientation also renders polymers more transparent. This is why BOPET film and bottles are both crystalline to a degree and transparent.

Amorphous PET crystallizes and becomes opaque when exposed to solvents such as chloroform or toluene.

PET is stoichiometrically a mixture of carbon and H2O, and therefore has been used in an experiment involving laser-driven shock compression which created nanodiamonds and superionic water. This could be a possible way of producing nanodiamonds commercially.
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The difference between   PP and   PP grafted maleic anhydride is typically determined by their intended usage, with homo...
07/09/2023

The difference between PP and PP grafted maleic anhydride is typically determined by their intended usage, with homopolymer PP being the mainstream choice.
Our PP is from the COACE B series of products and it possesses two key characteristics:
It has a relatively high grafting rate.
It exhibits good properties. is often used to improve compatibility between PP and glass or mineral fibers, so its primary purpose is to enhance dispersion.
Based on these two characteristics, our B series, whether or , aims to achieve a high grafting rate while also focusing on improving flow properties to ensure good dispersion.
For our B1A product, at 190°C and 2.16 kg, it can achieve a melt flow rate of 100g/10min. If you increase the temperature to 230°C, the melt flow rate should at least double to 2-2.5 times its original value.
Higher flow properties can help improve the dispersion of minerals or glass fibers during the modification process, thereby enhancing product performance.
Copolymer PP, on the other hand, needs to balance the properties of the final product, which may require a larger proportion of additives. Therefore, it must also consider maintaining its own mechanical properties during use.
We also have copolymer products, such as . For copolymers, we typically aim for slightly lower melt flow rates to meet specific application requirements.
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Cyperus Odoratus can be considered as natural filler which contain   fibers.The main advantages of using lignocellulosic...
04/09/2023

Cyperus Odoratus can be considered as natural filler which contain fibers.
The main advantages of using lignocellulosic fibers as an additive in is the low density, , abundant, low cost, high specific stiffness and strength, desirable fiber aspect ratio, less abrasive nature to the equipment during process renewable, high filling levels possible, low energy consumption and wide variety of fibers available throughout the world. Moreover, they can attract considerable interest as reinforcing fillers for thermoplastics especially those with a relatively lower melting point like , high and low density . Without , natural fillers embedded in a polymeric matrix generate unstable interfaces and the stress applied to the filler/polymer composite is not efficiently transferred from the matrix to the filler remains underexploited. The poor ability of the polymer to wet the filler hinders the homogenous dispersion of fillers within the polymeric matrix. Therefore it is important to improve compatibility of the two phases of the blend to achieve better homogeneity and morphology for improved and desired mechanical properties.
The effect of PP-g-MAH as a compatibilizer on the morphology of the PP/NR blends was investigated by scanning electron microscopy and the micrographs of tensile fractured surfaces of PP/NR with filler loading at 10% and 30% are illustrated in Figure 1 and 2. From the figure we can see that the blend system with -g-MAH as compatibilizer exhibit better dispersion of the fiber in the matrix. The fiber is well embedded in the continuous phase of the matrix. This shows a good between the natural filler and the matrix, PP. Generally polypropylene is categorized as a non-polar molecule while Cyperus Odoratus is polar molecule. PP becomes by grafting with anhydride. The addition of PP-g-MAH into the blend caused to increase dipolar interaction between the filler and matrix. Therefore, it could be achieved better adhesion and better dispersion of PP/NR and natural filler by compatibilizing the blends with PP-g-MAH.
The properties analyzed from the tensile properties shows that the increasing of filler loading decreased the tensile strength. The Young’s modulus also decreased with the increasing of filler loading however the elongation at break increases. Polypropylene graft maleic anhydride (PP-g-MAH) were used to compatibilize the blend. The compatibilizing of filled PP/NR with PP-g-MAH resulted in better tensile properties better than the uncompatibilized blends. A finer morphology with improved interfacial adhesion is obtained with all compatibilized blends.
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Low Smoke Zero Halogen MaterialLSZH materials are used in various applications where smoke emission and toxicity caused ...
31/08/2023

Low Smoke Zero Halogen Material
LSZH materials are used in various applications where smoke emission and toxicity caused by burning of the materials can be a safety hazard, such as in aircraft, trains, ships, data centers, and public spaces.
LSZH materials are made from special polymers that contain no halogenated additives, which are responsible for producing smoke and toxic fumes when the material is burned. Instead, LSZH materials are formulated with fire retardant chemicals that reduce the amount of smoke and toxic gases emitted during a fire.
LSZH materials are preferred in situations where human safety is of utmost importance, as well as in settings where sensitive electronic equipment is present, as smoke and corrosive gases can damage electronic components. LSZH materials are also more environmentally friendly compared to traditional halogenated materials, as they release fewer harmful substances into the environment when burned.
Benefits of Low Smoke Zero Halogen Material
Low Smoke Zero Halogen (LSZH) materials are used in a variety of applications where the release of smoke and harmful gases could pose a threat to human life or equipment. Here are some benefits of this material:
Less Toxicity: LSZH materials contain no halogens, which are known to emit toxic gases when burned. This makes them ideal for use in confined spaces such as aircraft cabins, submarines, and underground tunnels where the accumulation of toxic gases can pose a serious risk to human life.
Increased Safety: In addition to reducing toxicity, LSZH materials also reduce the amount of smoke produced during combustion. This helps to minimize the risk of smoke inhalation, which can cause serious health problems and impair visibility in emergency situations.
Improved Equipment Protection: LSZH materials are also beneficial for protecting equipment in the event of a fire. Since they produce less smoke, they can help to prevent smoke damage to sensitive electronic equipment, which can be costly to replace.
Environmental Friendliness: LSZH materials are also environmentally friendly, as they do not emit toxic gases when burned. This makes them a good choice for use in applications where sustainability and eco-friendliness are important considerations.
Compliance with Regulations: Many industries, including aerospace, transportation, and telecommunications, have regulations that require the use of LSZH materials in certain applications. Choosing LSZH materials can help ensure compliance with these regulations and avoid costly fines or other penalties.
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When semi-crystalline polymers crystallize from the melt (typically during the cooling phase of a process), the lamellae...
30/08/2023

When semi-crystalline polymers crystallize from the melt (typically during the cooling phase of a process), the lamellae organize from a primary nucleus to form complex macro-structures called spherulites. It is widely known that these continue to grow until they impinge on an adjacent spherulite at which point the growth ceases. The ultimate size of these spherulitic structures dictates a number of properties of the polymer, including optical and physical characteristics. Additionally, for crystal growth to commence there is a primary process that has to accur called ; this is basically the formation of a focal center around which the lamellae can organize themselves. The secondary process of crystal growth follows nucleation. The rate of secondary crystal growth and primary nucleation is strongly dependant on , as well as the type of polymers. also promote the formation of smaller and more numerous spherulites, often giving enhanced properties such as flexural modulus and heat deflection temperature (HDT).
COACE grade G1 is nano-scale inorganic silicate in powder to be used as nucleating agent (clarifiers) for polyester, like PBT, PC, etc. It plays a role as crystal nucleus, which helps promote nucleation. It could help improve the smooth surface of the final product. Recommended dosage: 0.2-0.5%.
Website:www.coacechemcial.com

The ratio of   and polyamide is a rather dominant factor affecting the properties of   PE/PA blends. In studies by Araúj...
28/08/2023

The ratio of and polyamide is a rather dominant factor affecting the properties of PE/PA blends. In studies by Araújo et al. the maximum yield stress of injection moulded test specimens with different blend compositions were compared. They studied the and compatibilized (by 2 wt.% of -g-MA) HDPE and recycled post-consumer polyethylene, PE/PC in blends with PA6 over the whole range of composition from 0 to 100 wt.% of PA6. As shown in Figure 1 the trend set by the uncompatibilized blend is repeated by the compatibilized and recycled blends, though, the results of the compatibilized blends are significantly higher values than those of the uncompatibilized blend. The trend is set by the continuous matrix phase.
The morphologies of tertiary /PA6/CP blends over a wide range of compositions prepared by reactive extrusion were studied by Argoud et al. They focused especially on high concentrations of the compatibilizer precursor and used SEM images to analyze the morphology with varying compositions. They observed 5 different morphologies: 1) PA droplets dispersed in a PE phase matrix; 2) PA stretched dispersion in a PE phase matrix; 3) co-continuous (the situation in which both phases form single continuous domains, without isolated drops); 4) PE phase stretched dispersion in a PA matrix; 5) PE phase droplets dispersed in a PA matrix.
There are two ways to alter the MA content in a blend: by varying the degree or the reactive polymer or by altering the concentration of the reactive polymer. Same total concentrations of MA moieties can be obtained by both methods, but as denoted earlier, the structural characters, such as grafting degree, can affect the reactivity of the compatibilizer precursor, and therefore the effect of grafting degree and concentration of compatibilizer precursors are elaborated here separately.
Even though in the scales relevant to processing the PE-g-MA is considered to be miscible with neat PE, there are some indications denoted by Argoud et al. that MA groups are not miscible with polyethylene at the molecular scale. These indications rely on the calculations that they performed related to the Flory-Huggins interaction parameter χ between PE monomer and MA groups which indicate that PE-g-MA should be considered as a copolymer containing entities not miscible with PE. For example, the results of the rheology measurements in their studies were thought to be a possible indication of the presence of micelles of MA moieties bridged by PE chains. However, the studies of Jiang et al. demonstrated that total miscibility of compatibilizer with the matric phase is not always desired but the migration of the CP to the interface between
PE and PA phases and thus the compatibilization reaction is more likely to occur.
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Adhesion strength of polymeric encapsulants such as EVA to the glass substrates on PV modules is an important factor tha...
24/08/2023

Adhesion strength of polymeric encapsulants such as EVA to the glass substrates on PV modules is an important factor that can affect critically the performance reliability and durability of modules exposed to weathering environments. Delamination of EVA from the glass superstrates on field-deployed crystalline-Si modules has been observed before. Lately, largely reduced adhesion strength of EVA from glass plates was reported after being subjected to the damp-heat test in an environment test chamber under 85% relative humidity at 85. In previous studies, we observed that moisture ingress and retention occurred in the glass/EVA/glass laminates, and that
moisture condensation occurred in the glass/glass assemblywith EVA around the edges only, when the samples were
exposed in the dark to high-low temperature and relative humidity cycles in a weatherometer. In the former
laminates, the originally clear and transparent EVA layer would become white/turbid, which gradually disappeared over time when the laminates were placed in the air to dry.
The milky white turbidity and its subsequent gradual disappearance were also observed on EVA/glass and glass/
EVA/glass laminates soaked in a 85 water bath in later experiments. The EVA layer on the EVA/glass laminates could be peeled off fairly easily when the laminates were still wet and hot, but was largely restored when dried. This adhesion recovery was also observed by
another group. There is a lack of systematic research to understand adhesion issues for the EVA used in PV
modules, however. To address such adhesion reliability issues, we conducted experiments to understand and determine the factors that may significantly affect the adhesion strength of EVA/substrate measured by
conventional peel-test methods, to quantify the water uptake and loss by EVA laminated with various substrates,
and to examine the hydrolytic stability of various silanes on glass substrates.
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1. The extruding is adopted for production of the low smoke zero halogen polyolefin insulation , and the sheath is produ...
23/08/2023

1. The extruding is adopted for production of the low smoke zero halogen polyolefin insulation , and the sheath is produced by extruded tube or semi-extruded tube. When the extrusion die is used, the high viscosity of the melt leads to the increasing of head pressure, and the extruded product is pressed more compactly, resulting in expansion when leaving the die . Therefore, the inner diameter of the die is selected to be larger than that of the finished product. The nominal diameter is about 5% smaller. The ratio must be considered when using extruded tube or semi-extruded tube production. The draw ratio of LSZH polyolefin is 2.5-3.2.
2. LSZH cable materials contain high-filling or hydroxide, so for the selection of screws, ordinary screws are generally used and its compression ratio should not be too large, generally 1:1 ~1:2.5 is more suitable.
3. Due to the particularity of LSZH materials, during the extrusion process, a large amount of heat is generated due to friction, which requires the extrusion equipment to have a good cooling device in order to control the process temperature. If the temperature is too high, large air holes will be formed on the surface of the cable, and if the temperature is too low, the current of the whole device will be increased, which will easily damage the device.
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Poly(lactic acid) ( ) as a kind of typical   thermoplastic aliphatic polyester has generated the interest of researchers...
21/08/2023

Poly(lactic acid) ( ) as a kind of typical thermoplastic aliphatic polyester has generated the interest of researchers worldwide due to its good biodegradability, biocompatibility, high mechanical strength, excellent processability, etc. However, three inherent drawbacks restrict the vast usage of PLA as a commodity . Firstly, the crystallinity and crystallization rate of PLA were very low, due to its poor chemical regularity. Secondly, the melt strength and viscoelasticity of PLA were poor. Thirdly, the poor toughness and impact resistance of PLA were weak.
Poly(ethylene octene) grafted with glycidyl methacrylate ( -g-GMA) was employed to improve the rheological and thermal properties, toughness, and foaming behaviors of poly(lactic acid) (PLA) through a chain extension effect.
It could be seen from Fig. 1 and Table 1, with the content of POE-g-GMA increasing from 0 wt% to 20 wt%, the glass transition temperature (Tg) of PLA decreased very slightly, indicating that the introduction of POE-g-GMA improved the movement ability of PLA chain segment. After the addition of POE-g-GMA, an interesting phenomenon could be observed that the cold crystallization temperature (Tcc) of PLA/POE-g-GMA decreased remarkably, which may be because the added POE-g-GMA would promote the migration of PLA molecular chains and the cold crystallization could be occurred at lower temperature. Compared with that of pure PLA, the Tm of PLA/POE-g-GMA blends decreased slightly, implying that the perfect degree of PLA spherulite was affected by the chain extension reaction between PLA and POE-g-GMA. The branching structure of new graft copolymer and the growth of molecular chain in PLA would hinder the movement of chain segments of PLA into lattice.
After the addition of POE-g-GMA, the strength of PLA was improved, which reached the highest value of 81.9 kJ m−2 with the POE-g-GMA content of 10 wt%. It could be observed that an obvious transition from bad cellular morphology to fine cell morphology with the content of POE-g-GMA increasing from 5 wt% to 10 wt%. Especially, the PLA/POE-g-GMA 15 blending foam had the largest cell size, cell density and VER.
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In attempts to improve the compatibility of   ( ) with polyethylene terephthalate ( ), amaleic anhydride grafted PP ( -g...
17/08/2023

In attempts to improve the compatibility of ( ) with polyethylene terephthalate ( ), amaleic anhydride grafted PP ( -g-MA) was evaluated as a in a blend of 30/70 wt % PP/PET. PP-g-MA was produced from homo polymer PP utilizing the technique of solid phase graft copolymerization. Qualitative confirmations of the grafting were made by transform infrared spectroscopy. Three different weight percent of compatibilizer, PP-g-MA, and 15 wt %have been used in PP/PET blends. The compatibilizing efficiency for /PET blend was examined using differential scanning calorimetry (DSC), optical microscopy (OM), scanning electron microscopy (SEM) of crycrofractured surfaces, and energy dispersive X-ray spectrum (EDAX). The results show that the grafted PP promotes a fine dispersed phase morphology, improves processability, and modifies the crystallization behavior of the polyester component. These effects are attributed to enhance phase interaction resulting in reduced interfacial tension. Also, the results show that the compatibilizing effects of the three amounts of grafted PP in blend are different and dependent on the amount used.Adding 10 wt % of compatibilizer into blend produced thefinest dispersed morphology. Elemental analysis results show that PP is matrix. DSC determination revealed that the melting temperature (Tm) of the PET component declined to some extent by comparison with neat PET.
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Tie layer resins (TLR) are functionalized polyolefins that are produced by grafting anhydrides or acids to a polyolefin ...
17/08/2023

Tie layer resins (TLR) are functionalized polyolefins that are produced by grafting anhydrides or acids to a polyolefin substrate in a post-reactor process. TLR are crucial for bonding dissimilar resins in multi-layer structures. For example, multi-layer packaging structures commonly include a non-polar polyolefin layer and a polar barrier resin layer, such as EVOH. A tie layer allows the polar and non-polar layers to adhere to each other. The most widely used polyolefin base materials for producing tie layer resins are linear low density polyethylene (LLDPE), low density polyethylene (LDPE), high density polyethylene (HDPE), polypropylene (PP), ethyl vinyl acetate (EVA), and styrene-ethylene-butylene-styrene (SEBS). The type of TLR used for a specific application is chosen based on factors including adhesion characteristics and the substrates to be bonded. In coextrusion, the polymer layers are brought together in the melt state. Tie resins are sandwiched between layers that do not bond on their own. Tie resins are typically comprised of a matrix resin and one or more functional components.The matrix resin is chosen to be compatible with one side to promote intermolecular diffusion at that interface. A reactive component is often added to bond to the other side.Factors that should be considered when choosing a tie resin for the packaging industry include the process used to make the film, the appropriate thickness and location of the tie and barrier layers to minimize extractables, the chemistry involved in the reactive and other functional ingredients, the additives used in the manufacture of the tie resin. etc.
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Preparing polymer blends is an effective way to tailor the good properties of plastics but the most commonly used polyme...
14/08/2023

Preparing polymer blends is an effective way to tailor the good properties of plastics but the most commonly used polymers are incompatible with each other. Therefore, to reduce the interfacial tension and to achieve finer and stable morphology, a suitable or has to be added to blends in order to establish new interactions between the phases. The effectiveness of styrene/ethylene/butylene/styrene block copolymer grafted with maleic anhydride ( -g-MA) was verified by blending two immiscible plastics: polystyrene ( ) and high density polyethylene ( ).
PS and HDPE are frequently used in packaging and everyday products; thereby they are often mixed together which implies that their mixed waste occurs too, although they are incompatible with each other. Because of economic and environmental reasons these wastes are recycled in increasing amounts. In order to avoid the costs of the separation process, a large number of papers have been presented on PS/PE blends to study and to improve their common properties.
The results show that SEBS-g-MA has a significant effect on the rheology, morphology and mechanical properties, furthermore also on the separability of 50/50 PS/HDPE . During the rheology experiment a consistent increase in viscosity was detected in the inspected range of shear rates, when compatibilizer was added to blends. If the amount of SEBS-g-MA increased, a finer morphology has developed, and at 1 vol% compatibilizer content the average droplet size decreased compared to the size distribution of the PS/HDPE blend without SEBS-g-MA; although in many cases the droplet sizes were larger than 5 to 10 μm in diameter, the adhesion with the matrix was weak. As a result of adding 2 vol% SEBS-g-MA to the blend the loose boundaries between the phases disappeared with a further droplet size decrease.
The results of the novel separation process show that the PS and HDPE phases of blends, which were previously compounded in twin-screw extruder, could be at least partially separate from each other, when blends contained 0 to 1 vol% SEBS-g-MA. From 2 to 10 vol% compatibilizer content, SEBS-g-MA prevents the separation of PS and HDPE phases because of the lower centrifugal force due to the smaller droplet size distribution and entanglements between the phases.
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Assessing the flammability of each material with different GF reinforcement rates is crucial, especially because GF rein...
10/08/2023

Assessing the flammability of each material with different GF reinforcement rates is crucial, especially because GF reinforcement is used as a flame-retardant mechanism and the composite part is a fuse holder that can be ignited if there is a short circuit. Based on standards IEC 60695-2-13, and IEC 60695-2-11 the glow wire test is considered valid if there is no material flowing for 30 s while the glow wire is in contact, and self-extinction occurs after the removal of contact with the glow wire. An additional safety parameter is added: flame height must not exceed 8 cm at maximum, in order not to exceed the total length of the part, prevent its total ignition and burning. It summarizes the flammability test results repeated 5 times for each configuration. The flame height is higher for the composite with a lower GF reinforcement rate. Flame height reaches 36.4 mm for the pure resin; however, from GF reinforcement rate of 20%, the flame height decreases to reach 9.2 mm. The flames heights became lower and lower; 5.4 mm for the 25% GF/PBT composite and 4.4 mm for the 30% GF/PBT composite. No flowing material and flame self-extinction were observed for any of the conditions after contact with the glow wire was removed.
GF reinforcements enhance the mechanical properties of the composite based on PBT matrix, by increasing its Young’s modulus, yield strength and elastic limit. However, high GF reinforcement rates in the structure causes a decrease in the elongation at break, which means an increase in the brittleness of the composite. The mechanical behavior of the studied composite depending on the GF reinforcement rate was confirmed by SEM observations of surface ruptures. So pure resin PBT showed only matrix cracks that confirmed the ductility of the material. However, reinforced composites showed matrix cracks, GF pull out, and cracks.
Furthermore, the GF reinforcements influence the flammability of the composite. The results improve that the flame height decreased when the GF reinforcement rate increased.
Finally, it shows that the GF reinforcement rate also affects the fluidity of the composite in the injection molding process. The results of the fluidity test showed that MFI decreased when increasing the GF rate in the composite which led to the appearance of micro-faults on the surface of the injected GF/PBT composite component.
Website:www.coacechemcial.com.

Poly(lactic acid) ( ) can be obtained from fully renewable biomass sources and is one of the most commercially viable re...
09/08/2023

Poly(lactic acid) ( ) can be obtained from fully renewable biomass sources and is one of the most commercially viable representative bio-plastic materials worldwide. PLA has been used in the medical and packaging industries The mechanical properties of soft biodegradable polymers are not fully exploited in the blends because of the low miscibility of PLA and other polymers. To overcome these problems, various contents of synthesized -g-MAH were applied as a to PLA/PBSeT blends. From the figures, all blend films presented higher tensile strengths than PBSeT alone and greater elongation at break than neat PLA. The elongation at break of PLA/PBSeT blend films with PLA-g-MAH showed a gradual increase with an increasing PLA-g-MAH content; Although the elongation characteristics of PLA/PBSeT blend films were improved by the addition of PLA-g-MAH, there was no statistically significant difference below 3 phr PLA-g-MAH sample and the control.This mechanical behavior might have occurred due to the ester bond reaction between the carboxyl group, which resulted from the ring opening of anhydride in PLA-g-MAH, and the hydroxyl groups of PLA and PBSeT. Moreover, the unreacted MAH molecule of PLA-g-MAH could have acted as a plasticizer for the blends, affecting the elongation at break. According to these mechanisms, adding the appropriate level of PLA-g-MAH led to an improvement of the mechanical and morphological properties of the blends.
The SEM images of the fracture surfaces of the samples showed many isolated PBSeT droplets in the PLA matrix. This feature indicates phase separation and poor between the PBSeT domain and PLA matrix. However, the droplet size in the compatibilized PLA/PBSeT blends gradually decreased with an increasing PLA-g-MAH content. Moreover, it was shown that the dispersion and distribution of the PBSeT domain in the PLA matrix appeared more evenly with an increased amount of added PLA-g-MAH. The reduction in droplet size reflected the enhanced interfacial adhesion between the polymers. Interfacial adhesion could be improved through the trans-esterification reaction within the hydroxyl groups of PLA and PBSeT and the anhydride group of PLA-g-MAH. The well-dispersed domain and increased interfacial adhesion thus promoted the tensile strength and toughness of the blends, which supported the results obtained for the mechanical properties of PLA/PBSeT blend films with PLA-g-MAH. In other words, these results indicate the effectiveness of PLA-g-MAH as a compatibilizer for the PLA/PBSeT blend.(Reference from PMC9266444)
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In recent years,   fibers have been extensively used as reinforcing fillers in  -polymer composite materials. Taro can b...
07/08/2023

In recent years, fibers have been extensively used as reinforcing fillers in -polymer composite materials. Taro can be applied as fillers or modifiers for plastics when their starch is used in the production of plastic which can help to accelerate the biodegradability of the parent polymer. Nevertheless, the main drawback of natural fillers is the lack of good adhesion between the two components because of the hydrophilic nature of the natural filler which is not compatible to the hydrophobic polymer matrix.
The interface properties of the polymeric composites can be promoted to better interfacial adhesion through the usage of . The compatibilizers have the ability to react with both natural fillers and the polymers by providing paths or building bridges across the interface.
From figure 1 and 2, the SEM micrographs display better compatibility between matrix and filler in addition of -g-MAH. The modulus of elasticity and thermal stability of the RHDPE (recycled high density polyethylene)/EVA/TP composites were noticeably improved by the addition of TP filler while tensile strength, elongation at break, swelling behavior, and water absorption decreased. The compatibilizer, PE-g-MAH was found to be effective in improving the tensile strength, modulus of elasticity, and thermal stability of RHDPE/EVA/TP/PE-g-MAH. The PE-g-MAH had more pronounced strength properties and modulus than the thermal properties. The swelling behavior and water absorption of the composites increased gradually with increasing TP filler loading. Based on the findings, the RHDPE/EVA/TP/PE-g-MAH composites can be used in applications requiring high strength and thermal stability.
Website:www.coacechemcial.com.

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