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polyvinyl chloride (PVC) PVC introduction modified
PVC resin separation understanding temperature degree and processing temperature degree separation 接近. 第一 HCl separation 子脱出, can formed is 一 “拉链式”脱HCl reaction. make resin 出现自 accelerated color, aging phenomenon. processing need add additives, anti separation understanding.
PVC processing properties 差, physical properties 不够理想, must modified.
（1） chlorine polyvinyl chloride (PVC) （CPVC）
generally PVC chlorine amount is 56.8%, CPVC is 66~73%(wt).
（2） crosslinked polyvinyl chloride (PVC)
tool has relatively high heat resistant deformation property, resistant solvent agent property and machine strong/high degree.
（3） copolymer or grafting
chlorine ethylene （VC） and acid ethylene ester （VC） copolymer.
chlorine ethylene / acrylic ester copolymer.
chlorine ethylene /烯烃 copolymer.
material modified 包括PVC resin alloy and filling composite/compounding modified 并进一步 made formed various specialized mixed combined material. is improvement processing properties, improve/increase heat resistant property, low temperature resistance property and impact resistant property can.
table/sheet 格 1 PVC modified methods and modified project and applications
|
modified methods |
copolymer mono 体 |
polymer 名称 |
main/primary modified project |
modified PVC applications |
|
random copolymer combined |
Vac(醋 acid ethylene ester ) ethylene , propylene ethylene ester |
VC/Vac copolymer VC/烯烃 copolymer inner increase 塑PVC |
processing properties processing properties processing properties |
film , sheet/slice 材,唱 sheet/slice , hard 质PVC type material, soft 质PVC type material |
|
grafting copolymer combined |
EPDM,EVA 氨基甲 acid ester acrylic ester SM, acrylic ester |
VC/EVC grafting copolymer , VC/氨 ester grafting copolymer , VC/ acrylic ester grafting copolymer , PVC grafting copolymer , |
resistant impact property can increase agent property resistant property , resistant impact property can processing properties |
pipe/tube ,窗 frame , film pipe/tube ,窗 frame , film pipe/tube ,窗 frame , film 窗 frame ,封口胶 |
|
chlorine method crosslinked polymerization, polymerization degree (2000~10000) polymerization |
chlorine polyvinyl chloride (PVC) crosslinked PVC high polymerization degree PVC |
heat resistant property (90~100℃) 消 light, high elastic property 化 soft 质, high elastic |
pipe/tube , sheet/slice 材,转盘 automotive, use 卡, hard sheet/slice automotive, building materials |
PVC additives types type very more, separation is increase agent, stabilizer, lubricant, modifier, processing additives, filler, color agent and anti-static agent, increase viscous agent, flame retardant, antimicrobial agent and other.
