文献类型：期刊文献

中文题名：星形丁苯热塑性弹性体的合成

英文题名：Synthesis of the star styrene-butadiene thermoplastic elastomer

作者：刘峰[1,2];应圣康[1,2];刘青[1,2]

机构：[1]华东理工大学活性聚合研究室;[2]中国石化燕山石油化工公司研究院

年份：1998

卷号：21

期号：4

起止页码：224

中文期刊名：合成橡胶工业

外文期刊名：China Synthetic Rubber Industry

收录：CSTPCD;;Scopus;CSCD:【CSCD_E2011_2012】；

语种：中文

中文关键词：星形;热塑性弹性体;偶联剂;偶联反应;丁苯橡胶

外文关键词：star styrene-butadiene thermoplastic elastomer;dimethyl phthalate;diphenyl phthalate; coupling agent; coupling reaction

摘要：以正丁基锂为引发剂、环己烷为溶剂、四氢呋喃为活性添加剂和结构调节剂，研究了分别以邻苯二甲酸二甲酯（ＤＭＰ）和邻苯二甲酸二苯酯（ＤＰＰ）为偶联剂合成（ＳＢ）ｎＲ（ｎ大于２）的工艺规律。结果表明，用ＤＰＰ作偶联剂，其偶联效率（ＣＥ）可达９３％以上，偶联反应在４５ｓ内完成；偶联反应温度对偶联反应无明显影响；当四氢呋喃／正丁基锂（ＴＨＦ／Ｌｉ，摩尔比）为０时，ＣＥ与偶联剂／正丁基锂（ＤＰＰ／Ｌｉ，摩尔比）无关；当ＴＨＦ／Ｌｉ大于０，ＤＰＰ／Ｌｉ大于０．３５时，ＣＥ随ＤＰＰ／Ｌｉ增大而减小；当ＤＰＰ／Ｌｉ为０．３５时，ＴＨＦ／Ｌｉ的增大对ＣＥ无明显影响，由于ＤＭＰ烃链上含有α－Ｈ，其ＣＥ只有８０％左右。
The star styrene-butadiene thermoplastic elastomers were synthesized by using dimethyl phthalate(DMP) and diphenyl phthalate(DPP)as coupling agents, n-BuLi as initiator,cyclohexane as solvent and tetrahydrofuran(THF) as activator as well as structure regulator. The effects of the amount of coupling agents and THF, the temperature and time of coupling reaction on the coupling reaction were investigated. The experimental results showed that when t was 45 s,T was 20～80 ℃, coupling efficiency(CE) was up to 93%; when THF/Li(molar ratio) was 0 ,DPP/Li had no influence on CE ; when THF/Li was more than 0, DPP/Li was more than 0.35 , CE gradually decreased with the increase of DPP/Li. Because DMP contains α -H,its CE was only about 80%.