活性氯型丙烯酸酯橡胶的热可逆共价交联  

Thermo-reversible Covalent Crosslinking of Acrylic Rubber Containing Active Chlorine

作　　者：刘红梅[1] 吕威贻[1] 李波[1] 夏宇正[1] 石淑先[1] 陈晓农[1] 

机构地区：[1]北京化工大学碳纤维及功能高分子教育部重点实验室,北京100029

出　　处：《高分子通报》2013年第4期171-178,共8页Polymer Bulletin

基　　金：国家科技支撑计划课题(2009BAE77B04)

摘　　要：利用热可逆季铵化反应特性,将含叔胺功能基团的聚合物用于活性氯型丙烯酸酯橡胶(ACM)的热可逆共价交联。通过乳液聚合方法合成了丙烯酸丁酯(BA)/4-乙烯基吡啶(4-VP)共聚物交联剂,考察了交联剂用量、模压温度和模压时间对ACM交联程度、力学性能的影响,并通过DSC、变温扭矩测定、热塑再加工成型等方法研究了交联ACM胶样的热可逆性。研究表明,BA-4-VP共聚物交联的炭黑填充ACM胶样拉伸强度可达8.5MPa,并可进行热塑模压成型,再次加工成型后胶样断裂强度增大、伸长率下降。Tertiary amine functionalized polymer was prepared and employed as thermo-reversible crosslinker for acrylic rubber containing active chlorine （ACM） through reversible quaternization/dequaternization between the tertiary amines and chlorine groups. Butyl acrylate/4-vinylpyridine copolymer crosslinker was synthesized through emulsion polymerization. The effect of the dosage of the crosslinker, thermo-compression temperature and time on the crosslinking degree and mechanical property of ACM was investigated. The reversibility of the crosslinked ACM was revealed by DSC, torque measurement during heating/cooling cycles and thermal re-processing of the crosslinked ACM. The tensile strength of BA-4-VP copolymer crosslinked ACM filled with carbon black could reach at 8.5MPa. The crosslinked carbon black filled ACM rubber could be re-shaped through thermocompression to obtain specimen with a larger tensile strength and a smaller elongation at break.

关 键 词：热可逆共价交联 季铵化反应 活性氯型丙烯酸酯橡胶 

分 类 号：TQ333.97[化学工程—橡胶工业]