摘要
为了了解聚L-乳酸(PLLA)自身结构特点,更好地控制其成型加工过程,研究了PLLA的非等温结晶行为、熔融行为和热失重过程。结果表明:降温速率对PLLA的非等温结晶过程具有显著影响,在1℃/min的降温速率下,PLLA的结晶起始温度为121℃,结晶焓为3.363 J/g;PLLA的熔融双峰遵循熔融-再结晶的机理;PLLA热分解温度在300℃左右,且随升温速率的增加而增大。
The non-isothermal crystallization behavior,melting behavior and thermal gravimetric progress of poly（L-lactic acid）（PLLA） were investigated in order to obtain the structure characteristics and control the processing technology of PLLA.The results show that the non-isothermal crystallization process of PLLA is affected by cooling rate,the oneset temperature of crystallization for PLLA is 121℃,and the crystallization enthalpy is 3.363 J/g;the double-melting peaks of PLLA result from melting-recrystallization;the thermal decomposition temperature of PLLA is about 300℃,which increases with the increase of heating rate.
出处
《塑料科技》
CAS
北大核心
2012年第1期80-83,共4页
Plastics Science and Technology
基金
四川省科技厅重点攻关项目(No.2006Z02-025)
关键词
聚L-乳酸
热性能
结晶行为
熔融行为
Poly（L-lactic acid）
Thermal property
Crystallization behavior
Melting behavior
