Open AccessThermal Decomposition Kinetics of Poly(L-lactic acid) after Heat Treatment
Author(s) -
YanHua Cai,
Yun-Chen Xie,
Ying Tang,
Lisha Zhao
Publication year - 2015
Publication title -
the open materials science journal
Language(s) - English
Resource type - Journals
ISSN - 1874-088X
DOI - 10.2174/1874088x01509010028
Subject(s) - thermal decomposition , materials science , decomposition , thermogravimetric analysis , activation energy , kinetics , isothermal process , chemical engineering , composite material , chemistry , thermodynamics , organic chemistry , physics , quantum mechanics , engineering
Thermal decomposition behavior of Poly(L-lactic acid) (PLLA) and PLLA composites after different heattreatment were investigated using thermogravimetric analysis. Firstly, the thermal decomposition results of neat PLLAshowed that the decomposition of PLLA was a first-order kinetic reaction, and thermal decomposition kinetics indicatedthat the heat treatment significantly affected activation energy of thermal decomposition of PLLA. The measurementresults also exhibited that the onset decomposition temperature of PLLA treated below 115 ° C was lower than that of thepristine PLLA. Then, the effect of additive CaCo 3 on the thermal decomposition behavior of PLLA was evaluated. Theaddition of CaCo 3 could significantly improve the crystallization performance of PLLA, but the CaCo 3 did not changethe decomposition trend of PLLA, and the thermal decomposition behavior of PLLA/CaCo 3 composites after isothermalheat treatment was similar to that of PLLA. However, the thermal decomposition activation energy of PLLA/CaCo 3 islower than that of PLLA.