Seven ways to improve the heat resistance of PVC plastic

Category: Solution

Release Time: 2025-04-11

Summary: If the composition of PVC (polyvinyl chloride) copolymer resin with other monomers contains polar or large groups, the heat distortion temperature of the copolymer will increase accordingly, and its heat resistance will be better than that of PVC, resulting in heat-resistant products.

　　1. PVC Copolymers

　　If the composition of PVC (polyvinyl chloride) copolymers with other monomers contains polar or large groups, the heat distortion temperature of the copolymer increases accordingly, and its heat resistance is better than that of PVC, resulting in heat-resistant products. The softening temperature of PVC is 78℃, while the softening temperatures of the copolymers vinyl chloride-vinyl chloride, vinyl chloride-methyl methacrylate, and vinyl chloride-acrylonitrile are 100~130℃, 85℃, and 140~150℃ respectively. (PVC crosslinking agent manufacturer)

　　2. PVC Chlorination

　　Chlorinated polyvinyl chloride is produced by chlorination of PVC resin, with a chlorine content of 62%~68%. Chlorinated polyvinyl chloride can be used continuously at 100℃ (20~35℃ higher than PVC), and the *operating temperature can reach 100~105℃. It also exhibits better chemical stability, flame retardancy, and cold resistance than PVC. However, chlorination equipment requires strict corrosion protection. The resin is difficult to process, and its poor impact toughness restricts its application and development. (PVC crosslinking agent manufacturer)

　　3. PVC Crosslinking

　　Crosslinked PVC can be produced by radiation crosslinking and chemical crosslinking methods. Crosslinked PVC products have higher mechanical strength, better dimensional stability, and superior heat distortion resistance, wear resistance, and chemical resistance compared to ordinary PVC products. Radiation-crosslinked wires can be used continuously at 100~110℃. (PVC crosslinking agent manufacturer)

　　4. PVC Blends with Other Polymers

　　PVC is mixed with other polymers in a certain proportion. The properties of the blend (with sufficient compatibility) are improved compared to PVC. Because after mixing two compatible polymers, molecular-level mutual fusion can be achieved, forming a single-phase structure, thereby supplementing and enhancing the properties of the blend, such as PVC/PS, PVC/PE, PVC/CPVC, etc. (PVC crosslinking agent manufacturer)

　　5. Adding Heat-Resistant Modifiers

　　Heat-resistant modifiers are a type of polymer with high heat resistance developed to improve the heat resistance of PVC. (PVC crosslinking agent manufacturer)

　　Poly(pentylimide): Prepared by the reaction of polymethyl methacrylate with CH3NH4.

　　SMA (styrene-maleic anhydride copolymer) is a better heat-resistant modifier for PVC introduced by US manufacturers.

　　HT-510 (Japan) is an acrylic series imide copolymer.

　　S700N is an α-methylstyrene-acrylonitrile copolymer.

　　ABS type heat-resistant modifiers: A15, A50B, A10 (Japan Gohsen).

　　MBS type heat-resistant modifiers: Mitsubishi H602, 605, 632.

　　In addition, there are ELIX200, 300; GE Blendex 702, 703, 586, 975, etc.

　　6. Adding Inorganic Fillers to PVC

　　Adding a certain amount of filler can improve the heat resistance of PVC. Commonly used fillers include: heavy calcium carbonate, light calcium carbonate, precipitated calcium carbonate, calcined clay, barium sulfate, red mud, titanium dioxide powder, etc. (PVC crosslinking agent manufacturer)

　　7. Adding Glass Fiber to PVC

　　Adding 20%~30% glass fiber to PVC can increase its heat resistance to over 100℃ without (or with less) plasticizer. The increase in heat distortion temperature is even more significant for PVC reinforced with long fibers. (PVC crosslinking agent manufacturer)

Keywords: Seven ways to improve the heat resistance of PVC plastic

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