摘 要：介绍了一种用于可生物降解医用高分子材料聚乳酸（PLA）及其改性高分子的分子量和分子量分布测定的GPC-十八角激光光散射联用技术。给出了该方法的实验原理、实验步骤和方法，并对其分析测试过程中的关键实验技术及实验结果进行了详细的讨论。实验获得了满意的结果，该方法可作为常规测定聚乳酸（PLA）及其改性高分子分子量及其分布的测定方法。
Abstract ：The paper introduced a GPC eighteen angles laser light scattering method to determine molecular weight and its distribution of biodegradable polymers of polylactid and laser light scattering experimental principle and experimental procedure. The method takes THF as mobile phase and solvent .The results of the experiment is satisfactory. It can be used as a routine method to determine biodegradable polymers of polylactid molecular weight and its distribution.
