摘要
在传统的二步混合加料法合成ＳＢＳ工艺的基础上，使总单体用量质量分数为１５％～１９％，第一步聚合３ｍｉｎ，合成聚苯乙烯硬段，第二步聚合６ｍｉｎ，合成聚丁二烯、无规Ｓ－Ｂ软段及聚苯乙烯硬段，即可制备Ｓ－Ｂ－（Ｓ／Ｂ）－Ｓ型的新型ＳＢＳ。反应体系属中、低粘度体系。在１００ｔ／ａ装置上进行了放大试验，产品的邵尔Ａ型硬度为８８度，拉伸强度为１７．９ＭＰａ，扯断伸长率为１１１２％。
A novel SBS,S-B-(S/B)-S,with high elongation and containing random S-B soft segments was prepared on the basis of synthesis of SBS by two-step mixed-feed process with monomer amount of 15%～19%(mass),synthesizing styrene hard segments in the first step for 3 min ,and synthesizing polybutadiene,random SBS soft segments and styrene hard segments in the second step for 6 min .The reaction system was medium and low viscosity system. The scale up test was carried out in a 100 t/a plant,the product had Shore A hardness 88 , tensile strength 17.9 MPa ,and elongation at break 1 112%.
出处
《合成橡胶工业》
CAS
CSCD
1997年第2期101-104,共4页
China Synthetic Rubber Industry
关键词
丁苯
嵌段共聚物
改性
伸长率
聚苯乙烯橡胶
styrene-butadiene block copolymer
synthesis
modification
styrene-butadiene tetrablock copolymer
microstructure
elongation
mechanical property
