| 聚L-乳酸的热性能研究 |
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| 引用本文： | 李顺江,蔡艳华. 聚L-乳酸的热性能研究[J]. 塑料科技, 2012, 40(1): 80-83 |
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| 作者姓名： | 李顺江 蔡艳华 |
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| 作者单位： | 重庆文理学院材料学院,重庆,402160 |
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| 基金项目： | 四川省科技厅重点攻关项目 |
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| 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。
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| 关 键 词： | 聚L-乳酸 热性能 结晶行为 熔融行为 |
Study on Thermal Properties of Poly(L-lactic acid) |
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| Li Shunjiang , Cai Yanhua. Study on Thermal Properties of Poly(L-lactic acid)[J]. Plastics Science and Technology, 2012, 40(1): 80-83 |
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| Authors: | Li Shunjiang Cai Yanhua |
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| Affiliation: | College of Materials,Chongqing University of Arts and Sciences,Chongqing 40260,China |
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| Abstract: | 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. |
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| Keywords: | Poly(L-lactic acid) Thermal property Crystallization behavior Melting behavior |
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