窄分布聚苯乙烯的分子表征

The Molecular Characterization of Polystyrene with Narrow Molecular Weight Distribution

一系列窄分布聚苯乙烯试样的平均分子量和分子量分布用NMR、VPO、粘度和SEC作了表征。本工作运用了表征方法的一些新发展,如VPO仪器常数的恰当订定,SEC扩展效应的改正,广义特性粘数方程的应用以求得各个分子参数。各试样用不同方法所得的结果相互印证,说明这些试样可作为多种用途的工作标准使用。

The average molecular weight and molecular weight distribution of a series of polystyrene samples with narrow molecular weight distribution were characterized by NMR, VPO, viseometry and SEC. The recent advances on the characterization methods such as proper determination of VPO instrumental constant, spreading correction of SEC and utilization of generalized intrinsic viscosity equation were adopted to evaluate the molecular parameters.The results obtained for each sample by different characterization methods were consistent, thus these samples could be used as working standards for various applications.