溶聚SBR和乳聚SBR的结构表征  

CHARACTERIZATION OF SOLUTION SBR AND EMULSION SBR

作　　者：贺智端[1] 胡慧贞[1] 张浩[1] 周伟平[1] 张颖[1] 

机构地区：[1]中国科学院长春应用化学研究所,130022

出　　处：《合成橡胶工业》1993年第1期48-51,共4页China Synthetic Rubber Industry

基　　金：中国石油化工总公司合成橡胶技术开发中心资助

摘　　要：用凝胶渗透色谱((GPC)和激光小角光散射(LALLS)联用法对不同牌号的溶聚SBR(S-SBR)和乳聚SBR(E-SBR)的分子量及其分布进行了测定。结果发现,E-SBR的(?)_w较大,分子量分布较宽,有些试样含有少量特大分子,还发现偶联的S-SBR图谱具有双峰。用氢质子核磁共振仪对两者的微观结构进行了表征,其中E-SBR不同试样的微观结构差别较小,而S-SBR不同试样的微观结构则存在明显差异,表明S-SBR链结构具有较大的可调节性。The molecular weight ana molecular weight distribution of solution styrene-butadiene rubber (S-SBR) and emulsion styrene-butadiene rubber ( E-SBR) were determined by gel permeation chromatography (GPC) combined with low angle laser light scattering (LALLS) method . It was found that the weight average molecular weight (Mw) of E - SBR was high andits distribution was wider .Some E- SBR samples possessed very small amount of ultra high molecules fraction . The chromatograms of coupled S-SBR consisted of two peaks . The micro-structures of S-SBR and E-SBR were determined by 'H-NMR.

关 键 词：丁苯橡胶 分子量 微观结构 

分 类 号：TQ333.1[化学工程—橡胶工业]