Synthesis and Rheological Properties of PBSu/PBAu Polyester Ureide Multiblock Copolymer
DAI Hong1,2, LIU Yuejun1,2, CUI Lingna2, LI Qiuai2
1 Key Laboratory of Polymer Processing Principle and Application, Xiamen University of Technology, Xiamen 361024 2 Key Laboratory of New Materials and Technology for Packaging, Hunan University of Technology, Zhuzhou 412007
Abstract: Anovel biodegradable polymer material — polyester ureide multiblock copolymers (PBSu-b-PBAu) composed of poly(butylene-succinate-urea) (PBSu) and poly(butylene-adipate-uera) (PBAu) was synthesized with toluene-2,4-diisocyanate (TDI) as a chain extender by melt polymerization. The optimum chain-extending reaction condition was obtained by conducting the synthesis experiment under varied reaction duration, reaction temperatures and chain extender adding amounts, and by applying the single factor analysis method. According to the optimum polymerization condition, we synthesized a series of PBSu-b-PBAu block copolymers, differing in feed composition, and determined their mole-cular weight and rheological propertied by means of GPC, rotational rheometry and capillary rheometry, respectively. The results showed that the multiblock copolymers possess higher viscosity and superior elastic effect compared to either PBSu or PBAu.
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2019, Vol. 33 
