用熔融共混法制备了成核剂癸二酸二苯甲酰肼(TMC-300)质量分数分别为0、0.1％、0.2％、0.3％、0.5％的PLLA2003D/TMC-300复合材料.采用偏光显微镜、差示扫描量热分析、热变形温度、扫描电子显微镜及力学测试等方法研究了PLLA复合材料的结晶性能、热性能和力学性能.结果表明,TMC-300的异相成核作用显著,复合材料的结晶度随着TMC-300含量的增加而大幅度增大.当加入质量分数0.5％的TMC-300时,PLLA 2003D的结晶度由6.00％提高到41.27％.含0.5％TMC-300的PLLA 2003D/TMC-300复合材料在110℃～120℃热处理5 min,H-DT值可达到115.8℃,TMC-300成核剂的加入提高了聚乳酸的耐热性和热稳定性.另外TMC-300成核剂可明显提高PLLA的力学性能,PLLA的拉伸强度和冲击强度都随着成核剂的加入明显提高.当加入0.5％的TMG300时,PLLA的冲击强度提高49.78％.
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