Shanghai Daoqin Plastics Co., Ltd.

         in automotive inner plastics in, PC/ABS ratio/proportion small. especially is grade 车, PC/ABS use material can 达5-10KG/车. PC/ABS in can property small separation 子(VOC)不容 small 觑, that let 我们一起 understanding lower PC/ABS in VOC 源.

        首先, raw materials in mono and emulsification agent and other; PC无论 is light gas method or ester method, mono comparison less. PC generally pure degree comparison high, this and production process and polymerization methods can separation. ester method PC production process in generate material 质, can 避免残留 has material 质. ABS production process in, 会残留 styrene and acrylonitrile mono 体. another emulsion method production ABS in, 80% emulsification agent ——十二烷基苯磺 acid 会残留 in powder in, easy remove. also has separation AS molecular weight adjustment agent, 如十二烷基硫 alcohol or powder lower, its easy solvent water, relatively easy remove.

         its 次, raw materials production process in solvent agent; PC in use solvent agent is CH2Cl2, method ABS in solvent agent is or 乙苯, 而因甲苯毒 property relatively large, 现以乙苯 solvent agent more. most rear plant/unit 不完善, solvent agent 都会滞留 in product in, formed is VOC material 质. value is, type material is VOC focus/key point tube/pipe for 象.

        第三, additives, compatibilizer, lubricant and demolding agent; PC and ABS in SAN versus separation versus 容, and PB versus versus 容, 故而会 add compatibilizer improvement versus property. certain low separation compatibilizer can can effect/influence VOC dispersion water 平. another, is increase material inner lubricated, formulation in 会引入 lubricant, this small separation is VOC material 质. most rear, in processing in is improved demolding property, outer 喷 一 demolding agent is material 质, is VOC material 质.

         most rear, degradation material. relatively 之ABS material 质, PC relatively easy separation understanding. in PC/ABS system in, generally 不会发生 acid alkali degradation or hydrophilic and agent degradation. in add additives 时, PC/ABS main/primary 会发生 hydrolysis and alcohol understanding. PC water absorption generally in 0.2% left right, PC separation upper ester for water separation 敏感, especially is high temperature lower easy hydrolysis formed small separation 子, generally requirements PC processing moisture content ultra- 0.02%.

         in high temperature lower, 羟基会进攻 ester 基发生 reaction, PC separation 子链发生 fracture formed small separation 子. light gas method PC 端羟基 content is 5%, ester method PC 端羟基 content is 20%, therefore ester method PC ratio light gas method PC more easy alcohol understanding, more easy formed more more small separation 子.

         understanding PC/ABS in VOC rear, for lower 药, in Raw Materials and material processing upper di tube/pipe lower, can has tube/pipe good VOC material 质, 打造出 ultra- low dispersion plastics.