【摘要】 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。更多还原

【Abstract】 PS standard samples with narrow and broad MWD were calibrated via SEC/RI/RALLS/DV. The good performance of the GPC/SEC instrument was confirmed. The dependence of exponent α of MHS equation on molecular weight was studied. The relationship of the radius of gyration(the root mean square radius) vs molecular weight was established. The results show that the SEC/RI/RALLS/DV technique can offer an effective way to obtain the parameters K、α of MHS equation, and the value of exponential α increases as the molecular weights of the samples increase.更多还原