N-取代马来酰亚胺稳定氯乙烯／偏二氯乙烯共聚物

Stabilization of Vinyl Chloride/Vinylidene Chloride Copolymers Using N--Substituted Maleimides

由于它们极好的阻透性能，氯乙烯／偏二氯乙烯共聚物在软包装市场上长期以来占有重要的地位。虽然这些聚合物有许多优秀的性能，然而，在加工温度下，它们往往会发生热诱导降解脱氯化氢反应。这种降解必须防止，以便使聚合物能够加工。本文合成了三个系列的N-取代马来酰亚胺（N-烷基、N-芳烷基和N-芳基），用光谱方法做了表征，作为标准氯乙烯／偏二氯乙烯（85wt％）共聚物可能的稳定剂进行了评价。

As a consequence of their excellent barrier properties,vinyl chloride/vinylidene chloride copolymers have long been prominent in the flexible packaging market. Which these polymers possess a number of superior characteristics,they tend to undergo thermally induced degradative dehydrochlorination at process temperatures. This degradation must be controlled to permit processing of the polymers. Three series of N--substituted maleimides （N--alkyl--,N--aralkyl--, and N- aryl- ）have been synthesized, characterized spectroscopically, and evaluated as potential stabilizers for a standard vinyl ehloride/vinylidene chloride（85wt%） copolymer. As surface blends with the polymer,these compounds are ineffective as stabilizers. However,significant stabilization may be achieved by pretreatment of the polymer with N-- ＇substituted maleimides. The most effective stabilization of the polymer is afforded by N- aralkyl- or N- arylmaleimides ,most notebly ,N-- benzylmaleinide and N-- （p--methoxyphenyl）maleimide.