氯化聚乙烯弹性体的固相法合成

讨论了以固相法合成氯化聚乙烯（ＣＰＥ）弹性体的过程．实验结果表明，以固相氯化反应所得的ＣＰＥ，其大分子链上Ｃｌ取代基的分布比水相悬浮法更均匀．氯化过程的温度直接影响氯化速度及分子结构，如残留结晶、氯分布等．而聚乙烯颗粒表面与内部的氯化程度取决于氯化速度．大分子链上Ｃｌ取代基对邻近基团的氯化起阻碍作用

Chlorinated Polyethylene Elastomer Synthesized by A Solid State Method

In this paper the chlorinated polyethylene(CPE) elastomer is synthesized by a solid state method. Results show that the chlorine distribution of CPE prepared by the solid state method is more homogeneous than that of CPE prepared by an aqueous suspension method. The chlorine distribution in the molecular chain, the residual crystallinity and the chlorination speed are affected by the reaction temperature. The degree of chlorination on the surface and in the bulk of polyethylene grains depends on the chlorination speed. The chlorine substitution on the macro molecular chain obstructs the chlorination of neighboring H atoms.