不同结合苯乙烯含量丁苯橡胶产品结构及性能研究  

Structure and properties of emulsion polymerized styrene-butadiene rubber(ESBR) with different bound styrene contents

作　　者：赵志超[1] 龚光碧[1] 吴丝竹[2] 胡育林[1] 李一[2] 

机构地区：[1]中国石油天然气股份有限公司石油化工研究院,北京100086 [2]北京化工大学,北京100029

出　　处：《弹性体》2015年第5期12-15,共4页China Elastomerics

基　　金：中国石油天然气股份有限公司炼油与化工分公司资助项目(2012B-2801-0347)

摘　　要：对中结合苯乙烯含量丁苯橡胶SBR1756进行了结构表征和热性能研究,并与低结合苯乙烯含量SBR1723N进行了对比。研究结果表明,SBR1756数均相对分子质量及重均相对分子质量均低于SBR1723N。红外谱图表明,2种样品的基本组成均为丁苯橡胶和环烷油,且差异不大;核磁共振谱图明确了2种样品的结构及含量,均与理论值相符。SBR1756玻璃化转变温度略高,2种样品热性能差异不大,起始分解温度和终止分解温度都比较接近。The structure and thermal properties of SBR1756,a type of styrene-butadiene rubber with medium bound styrene content,were investigated and compared with those of SBR1723 N,another type of styrene-butadiene rubber with low bound styrene content.The results showed that the weight average molecular weight and the number average molecular weight of SBR1756 were lower than those of SBR1723 N.IR spectrum indicated that the two types of rubber all consisted of ESBR and naphthenic oil;NMR spectrum confirmed the structure and the component content of the two types of rubber,which were consistent with theoretical values.The glass transition temperature of SBR1756 was slightly higher than that of SBR1723 N,and the difference between thermal properties of SBR1756 and that of SBR1723 Nwas not significant,in addition,the initial decomposition temperature and the terminal decomposition temperature of SBR1756 were similar to those of SBR1723 N.

关 键 词：SBR1756 SBR1723N 玻璃化转变温度 分解温度 

分 类 号：TQ333.1[化学工程—橡胶工业]