摘要
以丁二烯、苯乙烯为单体，改性萘锂为引发剂，ＳｎＣｌ４为偶联剂，采用负离子聚合，制备了锡偶联型溶聚丁苯橡胶（ＳＳＢＲ）。结果表明，随偶联度和结合苯乙烯含量增加，ＳＳＢＲ的流动性变差；偶联度对ＳＳＢＲ混炼胶流动性的影响明显低于生胶，其值以２．０为宜。与乳聚丁苯橡胶（ＥＳＢＲ）相比，ＳＳＢＲ具有流动性好，挤出膨胀比小，挤出物外观优异等特点；但ＳＳＢＲ对温度的敏感性较强，生胶的辊筒加工性略逊于ＥＳＢＲ。
The rheological properties of solution-polymerized SBR(S-SBR) coupled with tin chloride was studied.It was found that the apparent viscosity(ηa) of S-SBR gum increased with the increase of coupling degree and bound styrene content.The influence of coupling degree on ηa of S-SBR compounds was less than that of S-SBR gum obviously.This showed that the coupling structure of S-SBR was partly destroyed in mix processing, and a large number of bound rubber formed.Compared to the emulsion-polymerized SBR(E-SBR),S-SBR had the advantages of low ηa,small die swell and smooth extrudate appearance.The sensibility of S-SBR to temperature was strong and its compounding properties were slightly worse than those of E-SBR.
出处
《合成橡胶工业》
CAS
CSCD
北大核心
1995年第6期347-350,共4页
China Synthetic Rubber Industry
基金
中国石化总公司发展部资助
关键词
溶聚丁苯橡胶
流变性能
锡偶联型
丁苯橡胶
solution-polymerized SBR
emulsion-polymerized SBR
rheological property
coupling degree
processability
