氯化聚乙烯的热可逆共价交联  

THERMALLY REVERSIBLE COVALENT CROSSLINKING OF CHLORINATED POLYETHYLENE

作　　者：董永强[1] 陈晓农[1] 夏宇正[1] 焦书科[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《高分子学报》2001年第6期760-763,共4页Acta Polymerica Sinica

基　　金：国家自然科学基金 (基金号 2 0 0 740 0 );北京市自然科学基金 (基金号 2 0 0 2 0 15 );中国石化集团公司技术开发中心资助项目

摘　　要：采用新型热可逆共价交联剂 ,以溶液反应法使氯化聚乙烯 (CPE)交联制得了凝胶量在 80 %左右的共价交联CPE ,研究了不同牌号CPE、催化剂及其用量、反应温度、反应时间及交联剂用量对CPE交联程度的影响 。A new type of thermally reversible covalent crosslinker was applied to chlorinated polyethylene(CPE) in order to get a thermally reversible covalent crosslinked CPE and a crosslinked product with 81.79% gel content was obtained by means of solution reaction. The effects of CPE grades, catalysts and their dosage, reaction temperature and time and the dosage of crosslinker on the gel content were studied. It was proved by IR that the gel was generated through esterification between the chlorine on carbon of CPE and the carboxylic salt groups of the crosslinker. The gel content increases with the extension of reaction time and enhancement of temperature and also increases with the increased dosage of crosslinker. It was found that no gel was generated if the phase transfer catalyst was not applied to the reaction system. The crosslinked CPE exhibited thermally reversible behavior due to the dimer/monomer( cyclopentadiene) conversion of -DCPD- moieties via reversible Diels-Alder cycloaddition.

关 键 词：热可逆共价交联 氯化聚化烯 凝胶量 交联剂 热可逆转化 

分 类 号：O632[理学—高分子化学]