A study on the thermodynamic properties of polyimide BTDA-ODA by adiabatic calorimetry and thermal analysis |
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| Authors: | Song Y.-J. Meng S.-H. Wang F.-D. Sun C.-X. Tan Z.-C. |
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| Affiliation: | (1) School of Chemical and Material Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102600, China;(2) Dalian Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China |
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| Abstract: | ![]()
Polyimide BTDA-ODA sample was prepared by polycondensation or step-growth polymerization method. Its low temperature heat capacities were measured by an adiabatic calorimeter in the temperature range between 80 and 400 K. No thermal anomaly was found in this temperature range. A DSC experiment was conducted in the temperature region from 373 to 673 K. There was not phase change or decomposition phenomena in this temperature range. However two glass transitions were found at 420.16 and 564.38 K. Corresponding heat capacity increments were 0.068 and 0.824 J g–1 K–1, respectively. To study the decomposition characteristics of BTDA-ODA, a TG experiment was carried out and it was found that this polyimide started to decompose at ca 673 K.This revised version was published online in November 2005 with corrections to the Cover Date. |
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| Keywords: | thermal analysis low temperature adiabatic calorimetry polyimide thermodynamic property |
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