高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (8): 1137.

• 论文 • 上一篇    下一篇

GPC普适标定对星形支化聚苯乙烯适用性的实验验证

程叔耀   

  1. 武汉大学化学系, 武汉, 430072
  • 收稿日期:1991-10-22 出版日期:1992-08-24 发布日期:1992-08-24

A Study of the Applicability of GPC Universal Calibration to Star Branched Polystyrene

CHENG Shu-Yao   

  1. Department of Chemistry, Wuhan University, Wuhan, 430072
  • Received:1991-10-22 Online:1992-08-24 Published:1992-08-24

摘要: 用GPC-连续型粘度计-小角激光光散射光度计三联用装置研究了GPC普适标定对星形支化聚苯乙烯试样的适用性问题.结果证实:支化度因子g'≥0.131时的所有星形聚苯乙烯级分,普适标定均适用;但对g'<0.131时的星形支化聚苯乙烯高支化级分,普适标定将不能适用.

关键词: GPC-连续粘度计-小角光散射, 长链支化, 星形聚苯乙烯, 普适标定

Abstract: The applicability of universal calibration to star branched polystyrene was investigated by means of the apparatus of GPCcombined with a continuous viscorneter and a low angle laser light scattering photometer.The results show that the universal calibration is applicable to fractions of star branched polystyrene when their branched parameter g' (=[η]b/[η]l) is equal to or greater than 0.131z` but not to the higher branched fractions with g' <0.131.

Key words: GPC-continuous viscometer-low angle light scattering photometer, Long chain branching, Star-shaped polystyrene, Universal calibration

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