摘要
制备了不同相对分子质量、窄分子量分布的超高顺式稀土顺丁橡胶,并实现了连续中试工程放大。考察了稀土顺丁橡胶的相对分子质量及其分布、顺式-1,4-结构质量分数等对其加工性能、物理机械性能及动态力学性能的影响。结果表明,制备的稀土顺丁橡胶的数均分子量为1.1×105~3.4×105g/mol,分子量分布小于3.0,顺式-1,4-结构质量分数大于98.0%,甚至可达98.5%以上。当顺式-1,4-结构质量分数大于98.0%时,其加工性能、物理机械性能及动态力学性能优异,并随分子量分布变窄而进一步改善,压缩生热降低,压缩永久变形减小。
Rare earth polybutadiene with ultra- high mass fraction of cis-1,4-units and different relative molecular mass and narrow molecular weight distribution were prepared, and the continuous pilot industrial enlargement was realized. The effects of relative molecular mass and its distribution, mass fraction of cis-l,4-unit of rare-earth cis-1,4- polybutadiene rubber on processing properties, physical and mechanical properties and dynamic mechanical properties were studied. The results showed that the number average molecular weight of the prepared rare-earth cis-1, 4- polybutadiene rubber were 1.1×10^5～3.4×10^5g/mol, and molecular weight distribution were narrow, the mass fraction of cis-1,4- unit were more than 98.0%, even up to 98.5%. When the mass fraction of cis-1,4-unit was more than 98.0% , processing properties, physical and mechanical properties and dynamic mechanical properties were excellent, and were further improved by the narrowing of molecular mass distribution. Also the compression heat and compression permanent deformation were reduced.
作者
朱寒
郝雁钦
段常青
吴一弦
ZHU Han1, HAO Yan-qin2, DUAN Chang-qing2, WU Yi-xian1(1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; 2. Sinopec Beijing Yanshan Company, Beijing 102503, Chin)
出处
《合成橡胶工业》
CAS
CSCD
北大核心
2018年第2期88-94,共7页
China Synthetic Rubber Industry
基金
国家自然科学基金资助项目(21634002
51521062)
关键词
稀土催化剂
顺式-1
4-聚丁二烯
分子量分布
滚动阻力
抗湿滑性
rare-earth catalyst
cis-1,4- polybutadiene
molecular weight distribution
rolling resistance
wet-skid resistance
