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℃.
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