Thermal decomposition of aryl-alicyclic polyimides studied by thermogravimetry/mass spectrometry and pyrolysis-gas chromatography/mass spectrometry

E. Jakab, F. Till, T. Székely, S. S. Kozhabekov, B. A. Zhubanov

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The thermal decomposition of four aryl-alicyclic polyimides was studied by thermogravimetry/mass spectrometry and pyrolysis-gas chromatography/mass spectrometry. The effect of the structure of aliphatic segments on the thermal stability and decomposition mechanism of polyimides is discussed. The thermal stability is highly affected by the ring strain of the aliphatic cycles, but the chemical structure of aliphatic units has only a minor effect on the decomposition temperature of aromatic segments. However, the yield of pyrolysis products of both aromatic and aliphatic origin is substantially affected by the structure of aliphatic segments, showing that the primary decomposition of alicycles plays a key role in the decomposition mechanism. The fast pyrolysis and thermogravimetric analysis result in different product yields. However, in both cases the charring process is influenced by the hydrogen-content of the samples indicating the importance of hydrogen-transfer processes.

Original languageEnglish
Pages (from-to)229-243
Number of pages15
JournalJournal of Analytical and Applied Pyrolysis
Volume23
Issue number3
DOIs
Publication statusPublished - 1992

Fingerprint

gas chromatography
thermogravimetry
polyimides
Polyimides
Gas chromatography
thermal decomposition
pyrolysis
Mass spectrometry
Thermogravimetric analysis
Pyrolysis
mass spectroscopy
decomposition
thermal stability
charring
Decomposition
hydrogen
products
Hydrogen
Thermodynamic stability
cycles

Keywords

  • Gas chromatography
  • mass spectrometry
  • polyimide
  • pyrolysis
  • thermal decomposition
  • thermogravimetry.

ASJC Scopus subject areas

  • Analytical Chemistry
  • Physical and Theoretical Chemistry

Cite this

Thermal decomposition of aryl-alicyclic polyimides studied by thermogravimetry/mass spectrometry and pyrolysis-gas chromatography/mass spectrometry. / Jakab, E.; Till, F.; Székely, T.; Kozhabekov, S. S.; Zhubanov, B. A.

In: Journal of Analytical and Applied Pyrolysis, Vol. 23, No. 3, 1992, p. 229-243.

Research output: Contribution to journalArticle

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AU - Till, F.

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AU - Kozhabekov, S. S.

AU - Zhubanov, B. A.

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AB - The thermal decomposition of four aryl-alicyclic polyimides was studied by thermogravimetry/mass spectrometry and pyrolysis-gas chromatography/mass spectrometry. The effect of the structure of aliphatic segments on the thermal stability and decomposition mechanism of polyimides is discussed. The thermal stability is highly affected by the ring strain of the aliphatic cycles, but the chemical structure of aliphatic units has only a minor effect on the decomposition temperature of aromatic segments. However, the yield of pyrolysis products of both aromatic and aliphatic origin is substantially affected by the structure of aliphatic segments, showing that the primary decomposition of alicycles plays a key role in the decomposition mechanism. The fast pyrolysis and thermogravimetric analysis result in different product yields. However, in both cases the charring process is influenced by the hydrogen-content of the samples indicating the importance of hydrogen-transfer processes.

KW - Gas chromatography

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KW - pyrolysis

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