摘要
采用1%～5%不同浓度的碳酸钾晶须(PTW)对精制后的L型聚乳酸(PLLA)进行共混改性,以三氯甲烷为溶剂制成膜。分别用调制式热重分析法(MTGA),红外光谱(FTIR-ATR)和动态力学分析(DMA)对其进行表征。MT-GA结果表明PTW/PLLA共混物热分解的活化能Ea、指前因子Z和比速率ln[rate ratio]等热分解动力学常数均较未添加晶须的PLLA高,且PLLA的热分解过程为一步反应,FTIR-ATR和DMA结果表明,和PLLA相比,PTW/PLLA共混物的力学性能均有所改善。
The poly（L-lactic acid）（PLLA）cast film was blend modified using purified PLLA and 1%-5% potassi- um titanate whiskers（PTW）, the purified CHC13 acted as solvent. The specimen was investigated by modulated thermo- gravmitry analysis. The results showed the thermal decomposition process of the PLLA had step reaction, at the same time the value of E, Z and ln[rate ratio]all larger than pure PLLA. The data of Fourier transform infrared spectrometer-attenu- ate total reflection（FTIR-ATR） and dynamic mechanical analyses（DMA） supported that mechanical properties of PLLA were improved.
出处
《化工新型材料》
CAS
CSCD
北大核心
2013年第6期121-122,131,共3页
New Chemical Materials
基金
陕西省科技攻关项目(2008K07-32)
陕西省教育厅攻关项目(2010JS057)
陕西科技大学研究生创新基金资助
关键词
聚乳酸
钛酸钾晶须
共混改性
热稳定性
力学性能
poly（I
lactic acid）, potassium titanate whisker, blend modification, thermostability, mechanical property
