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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分别测定了窄分布和宽分布聚苯乙烯标样 ;得到了Mark -Houwink -Sakurada方程的K、α参数 ;计算了不同分子量范围的MHS方程指数α,建立了旋转半径和分子量的关系式。结果表明SEC/RI/RALLS/DV可以准确和方便地获取MHS方程的K、α参数 ,α值具有分子量依赖性。
The narrow-distribution and wide-distribution polystyrene standards were determined by volume exclusion chromatography / refractive index / orthogonal laser light scattering / differential viscosity detection. The K, α parameters of Mark-Hauwink-Sakurada equation were obtained. The index α of MHS equation in different molecular weight range was calculated, and the relationship between the radius of gyration and the molecular weight was established. The results show that SEC / RI / RALLS / DV can obtain K and α parameters of MHS equation accurately and conveniently, and α value has molecular weight dependence.