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Thermal degradation behaviour of aromatic poly(ester–imide) investigated by pyrolysis–GC/MS

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Abstract

The thermal degradation behaviours of a novel aromatic poly(ester–imide) (PEI) derived from pyromellitic dianhydride and 2,7-bis(4-aminobenzoyloxy)naphthalene have been investigated by thermogravimetric analysis (TGA) and by pyrolysis–gas chromatography/mass spectrometry (pyrolysis–GC/MS). The weight of PEI fell slightly in the temperature range of 350–450 °C in the TGA analysis, but the major weight loss occurred at 520 °C. Evolve gas analysis (EGA) of the PEI showed maximum release of pyrolyzates at 550 °C. The chemical structure of the volatile products resulted from the PEI pyrolysis at different temperatures was identified by pyrolysis–GC/MS. The cleavage of the ester linkage within the polymer chain initiated at 350 °C, and bond scission in the partially hydrolyzed pyromellitimide unit occurred in the temperature range of 450–500 °C. The bonds within the pyromellitimide unit started to cleave at 550 °C. The extensive decomposition of the pyromellitimide segment within the polymer backbone occurred at 600 °C. The possible thermal degradation pathways of this PEI are proposed on the basis of the pyrolysis products.

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Authors and Affiliations

  1. Department of Chemical Engineering, National Taipei University of Technology, 1 Chunghsiao East Road, 3rd Section, Taipei 100, Taiwan, Republic of China

    Wenjeng Guo, Tsu-Hwang Chuang & Sheng-Tuang Huang

  2. Department of Chemical Engineering, Tatung University, 40 Chungshan North Road, 3rd Section, Taipei 104, Taiwan, Republic of China

    Wen-Tsuen Leu & Sheng-Huei Hsiao

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  1. Wenjeng Guo
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  2. Tsu-Hwang Chuang
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  3. Sheng-Tuang Huang
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  4. Wen-Tsuen Leu
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  5. Sheng-Huei Hsiao
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Correspondence to Sheng-Huei Hsiao.

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Guo, W., Chuang, TH., Huang, ST. et al. Thermal degradation behaviour of aromatic poly(ester–imide) investigated by pyrolysis–GC/MS. J Polym Res 14, 401–409 (2007). https://doi.org/10.1007/s10965-007-9123-9

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  • DOI: https://doi.org/10.1007/s10965-007-9123-9

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