应用化学 ›› 1985, Vol. 0 ›› Issue (1): 77-79.

• 研究简报 • 上一篇    下一篇

GPC-LALLS研究各类顺丁橡胶的分子量分布

王小兵, 张宣琪, 贺智端   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1984-06-26 修回日期:1984-10-04 出版日期:1985-03-10 发布日期:1985-03-10

DETERMINATION OF MOLECULAR WEIGHT DISTRIBUTION OF 1,4-POLYBUTADIENE SAMPLES BY GPC-LALLS

Wang Xiaobing, Zhang Xuanqi, He Zhiduan   

  1. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1984-06-26 Revised:1984-10-04 Published:1985-03-10 Online:1985-03-10

摘要: 凝胶色谱与激光小角光散射(GPC-LALLS)联用是高聚物表征的有效手段,但将它用来研究橡胶的报导还很少见,这是由于实践中存在着一定的团难。对顺丁橡胶的表征国外曾有一些报导[1-3]。GPC-LALLS法不仅可以测定试样的几种平均分子量,更有意义的是可以直接测得谱图各区间的分子量,而且溶质的分子量越大,散射光强越高,因此光散射法对大分子特别敏感,本工作利用这方法的特点,克服了技术上的困难,对国内外不同催化体系合成的顺丁胶进行了对比表征,得到了满意的结果。

Abstract: Cis 1,4-polybutadiene samples prepared with different catalysts haye different physical, mechanical properties and processibility as well.It is related to their molecular weight distribution, microstructure and contents of the branched chains. The present paper describes the characterization of various kinds of cis 1,4-polybutadiene by gel permeation chromatography (GPC) coupled with low angle laser light scattering spectrometry (LALLS). Satisfactory results are obtained for both linear and branched samples.