^1H-NMR法测定苯乙烯-乙烯-丁二烯-苯乙烯嵌段共聚物的加氢度和微观结构  

Determination of hydrogenation degree and microstructure of styrene- ethylene-butadiene-styrene block copolymer by ^1H-NMR

作　　者：卜少华[1,2] 吴春红[2] 王足远[2] 郭灿雄[1] 

机构地区：[1]北京化工大学理学院,北京100029 [2]中国石化北京化工研究院燕山分院,北京102500

出　　处：《合成橡胶工业》2012年第5期332-335,共4页China Synthetic Rubber Industry

基　　金：中国石油化工集团公司攻关项目(499927)

摘　　要：采用核磁共振氢谱(1H-NMR)法测定苯乙烯-乙烯-丁二烯-苯乙烯嵌段共聚物(SEBS)的加氢度和微观结构。结果表明,采用镍系催化剂对苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)进行加氢反应制备SEBS时,在苯乙烯链段未参与加氢反应的前提下,通过对SBS和SEBS的谱峰进行归属,建立了用1H-NMR测定SEBS总加氢度的方法,且无需已知苯乙烯的摩尔分数,适用范围较宽;用该法还可直接得到SEBS中各微观结构含量和丁二烯1,2-结构和1,4-结构的加氢度。The hydrogenation degree and micro- structure of styrene-ethylene-butadiene-styrene block copolymer （SEBS） were determinated by ^1H-nulear magnetic resonance spectroscopy （NMR） . The re- sults showed that based on the assignments of ^1 H- NMR spectra lines of styrene-butadiene-styrene block copolymer （SBS） and SEBS, an analytic method was established to determine the total hydro- genation degrees of SEBS, which was prepared by the hydrogenation of SBS with nickel catalyst, andno styrene segment was saturated. The method had a broader determination range, need not know the mole fraction of styrene and could be used directly to determine the microstructure contents in SEBS and the hydrogenation degree of 1,2-unit and 1,4-unit of budadiene.

关 键 词：苯乙烯-乙烯-丁二烯-苯乙烯嵌段共聚物 核磁共振氢谱 加氢度 微观结构 

分 类 号：TQ330.1[化学工程—橡胶工业]