The weight-average molar mass ( Mw) of PCL reached 44800 g/ mol with polydispersity index ( Mw/ Mn) 1.6 when a reaction mixture of e-CL and benzoic acid was irradiated at 680W for 240 min. 反应混合体系于微波功率680W下辐照240分钟,所得聚合物的分子量达到44800g/mol且分散度为1.6。
Polyamide acid was prepared by means of polycondensation, taking PMDA and ODA as raw materials, and the effect of reaction time on the change of the weight-average molar mass of polyamide acid was measured by gel permeation chromatography ( GPC). 以均苯四甲酸二酐、4,4′二胺基二苯醚为原料,通过缩聚反应制备了聚酰胺酸,采用凝胶渗透色谱(GPC)考察了反应时间对产物重均摩尔质量的影响;