用双检测器凝胶渗透色谱法测定顺丁橡胶长链支化度

Determination of long chain branching in cis-1,4polybutadiene rubber by gel permeation chromatography with double detector combination

用带有示差折光检测器和自动黏度计的双检测器凝胶渗透色谱(GPC)测定了顺丁橡胶的长链支化度,与常用GPC-特性黏度([η])法的测定结果进行了对比,并考察了顺丁橡胶的微观结构对其长链支化度的影响。结果表明,用双检测器GPC测定顺丁橡胶的长链支化度是可行的;测定顺丁橡胶的长链支化度可不考虑其微观结构变化的影响。

The long chain branching in cis-polybutadiene rubber was measured by gel permeation chromatography （GPC） with refractometer/ viscometer detectors combination. The results obtained were close to those obtained by GPC-[η]. The influence of macrostructure on long chin branching were examined . The results showed that GPC with double detectors combination could determine long chain branching in cis-polybutadiene rubber moreconvenient than commonly used techniques and the variation of macrostructure had not significant effect determination for log chain branching in c/s-polybutadiene rubber.