GPC普适标定对星形支化聚苯乙烯适用性的实验验证

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

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.

The applicability of universal calibration to star branched polystyrene was investigated by means of the apparatus of GPC combined 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 0.131 but not to the higher branched fractions with g' <0.131.