长支链聚碳酸丁二酯的制备及表征  

Preparation and Characterization of Long Chain Branching Poly( Butylene Carbonate)

作　　者：林珊珊[1] 俞炜[1] 周持兴[1] 

机构地区：[1]上海交通大学化学化工学院流变学研究所,上海200240

出　　处：《中国材料进展》2014年第4期238-243,252,共7页Materials China

基　　金：国家自然科学基金资助项目(21074072);科技部973计划项目(2012CB025901)

摘　　要：脂肪族聚碳酸丁二酯是一种有着广泛应用前景的生物可降解材料,但是材料在加工过程中发生的热降解反应及材料本身存在的熔体强度低、拉伸强度低等缺陷却大大限制了其应用。为此,采用反应加工的方式对聚碳酸丁二酯进行改性,通过在共混体系内加入多官能团单体的方法来制备长支化的聚碳酸丁二酯。探索出了一种用酸酐类和环氧类多官能单体联用的方法,制备得到了高支化度、高分子量的聚碳酸丁二酯,并通过凝胶渗透色谱仪(GPC)及流变学方法,表征了长支化结构的产生,并推测了制备长支化聚碳酸丁二酯的官能团反应过程及可能出现的支化结构。研究结果表明,与未改性的聚碳酸丁二酯相比,改性后的样品力学性能得到明显改善,采用多官能单体联用的方法制备得到的长支化样品的力学性能最优。Aliphatic 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 isocya- nurate （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 me- chanical properties, and the properties of LCB-PBC are the best.

关 键 词：聚碳酸丁二酯 长支链 流变学 

分 类 号：O633.14[理学—高分子化学]