应用化学 ›› 1986, Vol. 0 ›› Issue (3): 50-55.

• 研究论文 • 上一篇    下一篇

1,2-聚丁二烯长链支化的研究

金春山, 孙淑莲, 隋少武   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1985-01-22 修回日期:1985-04-05 出版日期:1986-06-10 发布日期:1986-06-10
  • 通讯作者: 金春山

STUDY ON LONG CHAIN BRANCHING OF 1,2-POLYBUTADIENES USING GPC COUPLED WITH CAPLLARY VISCOMETER

Jin Chunshan, Sun shulian, Sui Shaowu   

  1. Changchun Institute of Applied Chemistry, Academia sinica
  • Received:1985-01-22 Revised:1985-04-05 Published:1986-06-10 Online:1986-06-10

摘要: 本文研究了1,2-结构含量在80~90%的1,2-聚丁二烯的长链支化,发现聚合物的立体规整性与聚合物的分子量无关,可以用GPC-自动粘度计联用技术研究其长链支化,产生支化的临界分子量为40万左右。

Abstract: The tacticity of 1,2-polybutadienes Was determined by using 13C-NMR technique.The results obtained show that the tacticity of the molecules did not change much with the change of molecular weight. Therefore the long chain branching of 1,2-polybutadiene may be characterized by GPC-AUV technique. The long chain branching of 1,2-polybutadienes was measured by a GPC coupled with an automatic recording capillary viscometer. In this work the experimental relation [η](V) was translated to the calibration curve [η](VR) for the mono disperse samples.The curve [η](VR) combined with the principle of universal calibration will provide the molecular weight distribution and the average brandhing effect in the samples.