摘要
在５０Ｌ聚合釜中，以ＭｏＣｌ＿５－Ａｌ（ｉ－Ｂｕ）＿３－ＰｈＯ（ｍ－ＣＨ＿３）为催化剂，烯丙基溴为分子量调节剂。先合成高乙烯基聚丁二烯橡胶（ＨＶＢＲ），再加入ＢＲ进行溶液共混，制得ＨＶＢＲ／ＢＲ共混生胶。结果表明，随ＨＶＢＲ用量增加，ＨＶＢＲ／ＢＲ共混生胶的屈服强度和门尼粘度提高，加工行为优于ＨＶＢＲ和牌号为ＣＢ４５ＮＦ的低顺式聚丁二烯橡胶；其硫化胶的耐磨性及回弹性降低，而硬度和耐老化性有所提高。并保持了ＨＶＢＲ低生热的优点。当ＨＶＢＲ用量为４０～６０份时，ＨＶＢＲ／ＢＲ共混硫化胶的综合性能优良，拉伸强度约为１６ＭＰａ，３００％定伸应力约为１０ＭＰａ，撕裂强度大于３０ｋＮ／ｍ，扯断伸长率为４２０％～４５０％。
High vinyl polybutadiene rubb6r(HVBR)was polymerized with MoCl5-Al(i-Bu)3-PbO(mCH3)catalyst system in a 50L polymerization reactor.Then the solution blended HVBR/ BR was prepared by the solution blending of HVBR and cis-1,4-polybutadiene(BR)in different mass ratios.The results showed that with the increase of HVBR content,the yield strength and Mooney viscosity of HVBR/ BR raw rubber increased,the abrasion and resilience of HVBR/BR vulcanizates decreased.hardness and aging resistance increased When HVBR content was 40～60 phr,HVBR/BR vulcanizates had good comprehensive properties,the tensile strength was 16 MPa,300% tensile modulus l0MPa,tear strength was more than 30 kN/m and elongation at break was 420%～450%.
出处
《合成橡胶工业》
CAS
CSCD
北大核心
1996年第6期338-341,共4页
China Synthetic Rubber Industry
关键词
顺丁橡胶
乙烯基
聚丁二烯橡胶
共混
橡胶
cis-1,4-polybutadiene rubber:high vinyl polybutadiene rubber
raw rubber
vulcanizate
microstructure
mechanical property
