作　　者： ; ; ; ; ; ;

机构地区： 海南大学材料与化工学院

出　　处： 《功能材料》 2011年第B04期295-298,共4页

摘　　要： 用熔融法制备了含成核剂TMC-328质量分数分别为0、0.1%、0.2%、0.3%的聚乳酸(PLA)/TMC-328共混物,采用偏光显微镜(POM)、差示扫描量热仪(DSC)及扫描电子显微镜(SEM),研究了PLA共混物的结晶性能、热性能和内部形貌。结果表明,TMC-328对PLA结晶性能的影响体现在PLA的冷结晶过程上,并且最佳添加量为0.1%,相对应的冷结晶温度(Tcc)从126.14℃降到111.40℃,冷结晶焓(ΔHcc)从11.34J/g增加到23.49J/g,在100℃下完全结晶的时间为22min左右,SEM照片显示TMC-328的团聚现象随着含量的增加变得很明显。 A series of poly（lactic acid） （PLA）/ TMC-328 blends were prepared by melt blending based on nucleating agent TMC-328 contents were 0, 0.1%, 0.2%, 0.3%, respectively. This work presented the effect of TMC-328 on poly（lactic acid） （PLA） crystalline structure and property. Various techniques including DSC, SEM and polarized light microscopy（POM） were employed to investigate crystalline structure property and thermal properties for the samples. Experimental results indicated that the influence of TMC-328 on crystalliza- tion properties of PLA embodied in the PLA cold crystallization, and the optimum TMC-328 addition was 0.1%, according to the cold crystallization temperature（Tee） and enthalpy（ΔHcc） from 126.14 down to 111.40, from 11.34J/g to 23.49J/g, respectively. It was approximately 22min until the PLA crystallization completely from melt at 100℃. The agglomeration of TMC-328 increasing with the contents becomes obviously by the SEM photographs.

关 键 词： 聚乳酸 成核剂 冷结晶 结晶性能

领　　域： [化学工程]