增容型聚甲基乙撑碳酸酯/聚丁二酸丁二醇酯共混材料的制备与性能  

Preparation and Properties of Compatible Poly(Propylene Carbonate)/Poly(Butylene Succinate)Blends

作　　者：陈桂吉[1] 李伯全 赵敬东 甘力强[4] 王拴紧[1] 肖敏[1] 孟跃中[1] 

机构地区：[1]广东省低碳化学与过程节能重点实验室中山大学,广东广州510275 [2]广州科晶化学有限公司,广东广州510730 [3]深圳市盛佳伦橡塑工业有限公司,广东深圳518110 [4]河南天冠企业集团有限公司,河南南阳473000

出　　处：《高分子材料科学与工程》2013年第12期148-151,共4页Polymer Materials Science & Engineering

基　　金：863计划重点项目(2009AA034900);广东省重大专项(2008A08080021)

摘　　要：在聚甲基乙撑碳酸酯(PPC)/聚丁二酸丁二醇酯(PBS)共混体系中加入4,4′,4″-三苯基甲烷三异氰酸酯(TTI)作为增容剂,与PPC和PBS的端羟基反应形成扩链产物,原位生成PPC和PBS的相容剂,从而提高材料的相容性。文中采用熔体流动速率分析、微卡软化温度测定、拉伸性能和冲击强度测试来表征材料的性能。共混物制备过程扭矩的提高和共混物熔体流动速率的降低表明了扩链反应的进行,材料断裂伸长率和冲击强度的提高表明,TTI的加入能促进两组分相容性的明显改善,扩链反应的进行和体系相容性的提高也使共混材料的热性能得到显著提高。当TTI加入量由0 phr增加到0.36 phr时,共混物的断裂伸长率由46.3%增加到了212.0%,缺口冲击强度由4.5kJ/m2增加至9.0 kJ/m2,维卡软化点由57.6℃提高到了68.7℃。The blends of high molecular weight poly（propylene carbonate） （PPC） and poly（butylene succinate） （PBS） were prepared by melt blending using 4, 4＇, 4＂-triphenylmethane triisocyanate （TTI） as reactive coupling agent. TTI also serves as compatibilizer for PPC/PBS blends, the properties of PPC/PBS blends were investigated through the measurements of melt flow rate, Vicat softening temperature, tensile testing and impact testing. The increase of torque during melt blending and the decrease of melt flow rate indicate the reaction of chain extension. The enhancement of thermal and mechanical properties of PPC/PBS blends demonstrates the improvement of compatibility between PPC and PBS. When 0.36 phr TTI was added, the elongation at break of PPC/35PBS blends increases from 46.3% to 212.0%, the Charpy impact strength increases from 4.5 kJ/m2 to 9.0 kJ/m2, and the Vicat softening temperature improves from 57.6℃ to 68.7 ℃.

关 键 词：聚甲基乙撑碳酸酯 聚丁二酸丁二醇酯 4 4’ 4”-三苯基甲烷三异氰酸酯 增容剂 

分 类 号：TQ316.63[化学工程—高聚物工业]