成核剂TMC-210对聚乳酸结晶及性能的影响

发布时间：2018-08-26 21:36

【摘要】：针对聚乳酸结晶速率慢和冲击强度低的问题,考察了熔融共混添加成核剂TMC-210对PLLA结晶、熔融行为和力学性能的影响。研究发现,纯L-聚乳酸(PLLA)在10℃/min降温过程中不结晶,当TMC-210质量分数为0.2%时,PLLA就能显著结晶,并且随着TMC-210含量的增加,结晶峰移向高温。从等温结晶结果看,TMC-210的添加使得PLLA结晶时间缩短,结晶速率加快。另外,PLLA的成核密度增加且球晶尺寸减小,同时,TMC-210质量分数为0.2%时,PLLA的冲击强度提高了3.3倍。因此,添加TMC-210是一种能够促进PLLA结晶和增韧的有效成核剂。
[Abstract]:In view of the low crystallization rate and low impact strength of polylactic acid, the effects of nucleating agent TMC-210 on the crystallization, melting behavior and mechanical properties of PLLA were investigated. It is found that pure L- polylactic acid (PLLA) does not crystallize during cooling at 10 鈩，

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