多检测GPC/SEC技术在高分子表征中的应用Ⅷ.超支化高分子的溶液性质

Use of Multiple Detectors GPC/SEC in Polymer Characterization Ⅷ. The Solution Properties of Hyper-branched Polymer

采用体积排斥色谱法 /示差折光指数 /直角激光光散射 /示差粘度三检测联用技术在 2 5℃的THF中表征了超支化高分子的溶液性质 ;结果表明超支化高分子符合普适标定规律 ,体积排斥色谱法 /示差折光指数 /直角激光光散射 /示差粘度三检测联用技术能解释传统SEC/RI技术不能解释的溶液行为。

Hyper-branched polymers were studied via SEC/RI/RALLS/DV in THF at 25 ℃. The solution behavior was discussed. The universal calabration was justified. The slope α and intercept K of logR g vs logM equation for different hyper-branched polymers characterized were obtained and the effect of molecular structure on the slope α was also discussed. The results show that SEC/RI/RALLS/DV can give meaningful information of the hyper-branched polymers, which can not be obtained via conventional SEC/RI.