Synthesis, surface properties and performance of thiosulphate-substituted plasticized poly(vinyl chloride).
Synthesis, surface properties and performance of thiosulphate-substituted plasticized poly(vinyl chloride).
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DOI：
10.1016/s0142-9612(02)00243-0
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发表时间：
2002-12
期刊：
影响因子：
14
通讯作者：
S. Lakshmi;A. Jayakrishnan
中科院分区：
文献类型：
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作者：
S. Lakshmi;A. Jayakrishnan
增塑聚氯乙烯 (PVC) 通过在水介质中在相转移催化剂存在下用硫代硫酸盐亲核取代 PVC 的氯原子进行表面改性。通过接触角测量、衰减全反射傅里叶变换红外光谱、X射线光电子能谱和扫描电子显微镜评估了改性表面的性能。在己烷、棉籽油和聚乙二醇-400 (PEG-400) 中检查增塑剂邻苯二甲酸二(2-乙基己基)酯从对照以及改性 PVC 中的迁移。虽然发现改性 PVC 在己烷、棉籽油和 PEG-400 中具有高度抗迁移性，但可提取增塑剂。改性 PVC 被发现会引起溶血并具有细胞毒性。从取代过程的机理角度出发，可以解释改性材料在不同提取介质中的性能差异及其毒性。
Plasticized poly(vinyl chloride) (PVC) was surface modified by nucleophilic substitution of the chlorine atoms of PVC by thiosulphate in aqueous media in the presence of a phase-transfer catalyst. The properties of the modified surface were evaluated by contact angle measurements, attenuated total reflection Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and scanning electron microscopy. Migration of the plasticizer di-(2-ethylhexyl) phthalate from control as well as modified PVC was examined in hexane, in cottonseed oil and in poly(ethylene glycol)-400 (PEG-400). While the modified PVC was found to be highly migration resistant in hexane, cottonseed oil and PEG-400 extracted the plasticizer. The modified PVC was found to cause haemolysis and was cytotoxic. A possible explanation for the difference in performance of the modified material in different extraction media and its toxicity is presented from a mechanistic view of the substitution process.