Advanced Rheology Institute, Department of Polymer Science and Engineering,
Shanghai Jiao Tong University, Shanghai 200240, ChinaAliphatic poly(butylene carbonate) (PBC) is a kind of biodegradable materials which has a broad application prospects, but the thermal degradation, low melt strength during processing has greatly limited its application. Therefore, in this paper long chain branching (LCB) poly(butylene carbonate) (PBC) was prepared by reactive processing using multi-functional monomers blending. LCB PBC with high molecular weight and long branch was successfully prepared by the successive reactions of the end hydroxyl groups of PBC with pyromellitic dianhydride (PMDA) and triglycidyl isocyanurate (TGIC). Gel permeation chromatography (GPC) and rheology were adopted to characterize the structures of LCB PBC. The reaction mechanism was also suggested.The research results showed that modified PBC samples had better mechanicalproperties, and the properties of LCB PBC are the best.
Key words:poly(butylene carbonate); long chain branching;rheology