Shanghai Daoqin Plastics Co., Ltd.

         polymer chemical material effect/influence degree and many factors has 关. this factors 包括: polymer formed (chemical formed, and filler and additives in); polymer crystallization degree;暴露 conditions: time, temperature degree, pressure; polymer is to force: processing process in add external or internal force;当然 also chemical material 质自身 property 质: acid, alkali, has machine, machine, aromatic, aliphatic and other and other.

         polymer in chemical material in 时, small separation chemical material and polymer chemical or material versus function.

        · 吸附 is chemical material and polymer surface versus function.

        · absorption is chemical material usually through expand dispersion mechanism in polymer in dispersion, chemical material 质渗透 to polymer in.

         material and chemical versus function

         material versus function usually 会导致 polymer soft 化(也称 is 塑化) and 膨胀, this is due to chemical material 质渗透 to polymer 无定形区域 自由体积 in. in semi crystallization polymer in, polymer crystallization tool has relatively low 自由体积, therefore semi crystallization polymer easy to small separation expand dispersion and absorption effect/influence. in many lower, remove chemical material 质并随 rear drying, can make polymer to its 原始状态.

         however if by absorption chemical material in drying as is solvent agent, solvent understanding remove 无定形 versus in certain low molecular weight polymer, that this type of remove low molecular weight polymer is, can polymer 脆化, make polymer property can significantly property 改变. solvent agent 也会随 time 推移“清洗” polymer in increase agent and stabilizer and other additives.

         and polymer chemical versus function usually 会导致 crosslinked (from increase molecular weight) or degradation /断链(reduce molecular weight). this versus function usually is can 逆, can polymer property can significantly property 改变.

         ring force cracking (ESC)

        当 polymer in chemical material in in force lower (most Common is external add force), force cracking can polymer fracture. ring force cracking (ESC) is in force function lower surface material non chemical versus function 结果: 未发生 chemical 转变, force cracking agent accelerated macro property fracture formed.

         although method forecast which chemical material 质会导致 ring force cracking, usually lower, surface active property agent is most has 效 应 force cracking agent. ring force cracking similar metal in force cracking phenomenon. 而VICTREX™ PEEK can in very large degree upper ring force cracking.

         in-depth research necessary property

        综 upper 述, is development technology innovation type solutions, used for gas ring in polymer chemical resistance testing, is non important 方面. if target/goal is forecast thermoplastic property composite/compounding material tube/pipe in poor use ring in lifespan, can 孤立 考察 polymer degradation, therefore polymer chemical resistance testing is its in 一 方面. also need other mechanism, fiber reinforcement degradation, fiber /基体 interface degradation and versus 邻层间 interface degradation.