Preparation and Rheological Characterization of Long Chain Branching Polyglycolide  

作　　者：Wei-Lin Liu Ming-Fu Lyu Heng-Yuan Zhang Jian-Ye Liu Shi-Jun Zhang 

机构地区：[1]Beijing University of Chemical Technology,Beijing 100029,China [2]SINOPEC(Beijing)Research Institute of Chemical Industry Co.,Ltd.,Beijing 100013,China

出　　处：《Chinese Journal of Polymer Science》2024年第8期1177-1184,共8页高分子科学（英文版）

摘　　要：The long chain branching(LCB)polyglycolide(PGA)was successfully prepared by the successive reactions of the terminal hydroxyl groups of PGA with triglycidyl isocyanurate(TGIC)and pyromellitic dianhydride(PMDA).The influence of LCB produced by functional group reaction on rheological and crystallization behavior was studied and discussed through linear rheology,uniaxial elongation and DSC(differential scanning calorimetry).The much higher viscosity and the more notable strain hardening behavior of modified PGA indicates the LCB with high degree of entanglements are created.The melt strength of PGA is finally improved greatly and can make su re that the supercritical CO_(2)foaming can be carried out successfully.

关 键 词：Polyglycolide(PGA) Long chain branching(LCB) RHEOLOGY 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]