Citation: WU Wei-Kang, WANG Jia-Li, LIU Su-Qin, HUANG Ke-Long, LIU Yan-Fei. Thermal Decomposition Kinetics of Poly(propylene carbonate maleate)[J]. Acta Physico-Chimica Sinica, ;2010, 26(11): 2915-2919. doi: 10.3866/PKU.WHXB20101028 shu

Thermal Decomposition Kinetics of Poly(propylene carbonate maleate)

1.
1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China;
2. The Translational Medicine R &DCenter, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, Guangdong Province, P. R. China

Received Date: 14 May 2010
Available Online: 17 September 2010
Fund Project: 国家自然科学基金(20976197) (20976197)高等学校博士学科点专项科研基金(20090162120013)资助项目 (20090162120013)

The thermal decomposition kinetics of the novel terpolymer, poly(propylene carbonate maleate) (PPCMA), was investigated using thermogravimetric (TG) analysis at different heating rates. A new computational method called nonlinear approximation (NLA) is introduced in this work. The Flynn-Wall-Ozawa (FWO), Tang, Kissinger-Akahira- Sunose (KAS), and NLA methods were used to calculate the apparent activation energy (Ea). The results show that the NLA method is ideal for Ea calculations because of its simpler and more appropriate analysis process. It does, however, give slightly higher average relative errors for Ea compared to the other typical model-free methods. Calculations using the solid-state reaction model-fitting method indicated that the thermal decomposition process was composed of multiple mechanisms. For the whole decomposition process, the values of Ea were between 70 and 135 kJ·mol^-1, and the pre-exponential factor (A) varied from5.24×10⁴ to 9.89×10⁷ min^-1. The differences in Ea also explain the differences in decomposition temperature between poly(propylene carbonate) (PPC) and PPCMA.
- Polycarbonate,
- Carbon dioxide,
- Thermal decomposition kinetics
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