Cited by 404Thermal and Kinetic AnalysisPolymer Science and PVCPolymer crystallization and properties

Thermal degradation of segmented polyurethanes

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Petrović, Zoran S., Zavargo, Zoltan, Flyn, Joseph H., Macknight, William J.·1994·Journal of Applied Polymer Science

Abstract

Abstract Thermal degradation of polyurethane samples was studied by a thermogravimetric method. The effect of soft‐segment length and soft‐segment concentration on activation energy of the degradation process was measured. Three methods of calculation gave activation energies at different stages of the very complex weight loss process. It was shown that at initial stages of the weight loss the process was dominated by hard‐segment degradation. Activation energy of the whole process calculated by the Ozawa–Flynn method did not offer clear insight into the structure–stability relationship of polyurethanes. The second method showed that activation energy of the initial stage of degradation increased with decrease in hard‐segment length. The Flynn method of calculating activation energy produced fairly constant activation energy of the first 40% degradation, at around 150 kJ/mol, for polymers in the C series. Generally, calculation of kinetic parameters of a complex degradation process as in polyurethanes gives results that are not easy to interpret. It has been shown qualitatively that polymers with higher soft‐segment concentration display lower initial weight loss and higher onset temperatures of degradation. © 1994 John Wiley & Sons, Inc.

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Crossref · 10.1002/app.1994.070510615

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  • Thermoplastic SMPUs undergo thermal degradation first via decomposition of urethane bonds before soft segments start to decompose.

    “Thermoplastic SMPUs undergo thermal degradation first via decomposition of urethane bonds before soft segments start to decompose [235,236].”

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Research works printed but not linked: 14

  1. S. A. Stepanyan and I. V. Kozlov, Vysokomol. Soyed. Ser. B, 1 4 ( 4 ) , 246 (1972).
  2. V. K. Belyakov, I. I. Bukin, 0. G. Tarakanov, and A.A. Berlin, Vysokomol. Soyed. Ser. A, 13, 1585 (1971).
  3. P. L. Rumao and K. C. Frisch, J. Polym. Sci. A l , 10, 1499 (1972).
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  7. Z. Petrovit, PhD Thesis, University of Strathclyde, Glasgow, 1974.
  8. J. Ferguson and Z. Petrovit, Eur. Polym. J., 12, 177 (1976).
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  13. J. H. Flynn, in Thermal Methods in Polymer Analysis, S. W. Shalaby, Ed., The Franklin Institute Press, Philadelphia, 1978, pp. 163-186.
  14. J. H. Flynn, in Thermal Analysis, R. F. Schenker, Jr. and P. D. Garn, Eds., Academic Press, New York, 32,4353 (1986).

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Authors
Petrović, Z. S., Zavargo, Z., Flyn, J. H., & Macknight, W. J.
Affiliations
  • University of Novi Sad (RS)
  • National Institute of Standards and Technology (US)
  • University of Massachusetts Amherst (US)
Venue
Journal of Applied Polymer Science
Publisher
Wiley
Published
1994-02-07
Volume
51
Issue
6
Pages
1087-1095
ISSN
  • 0021-8995 (ISSN-L)
  • 1097-4628
OpenAlex
W1973937445
Cited by
404
References
18
Citations by year
2026: 14 · 2025: 14 · 2024: 24 · 2023: 17 · 2022: 19 · 2021: 12 · 2020: 12 · 2019: 22 · 2018: 21 · 2017: 19 · 2016: 25 · 2015: 19 · 2014: 21 · 2013: 17 · 2012: 16
FWCI
2.35
Type
journal article
Language
en
Open access
Locations
  • Journal of Applied Polymer Science (publishedVersion)
  • ScholarWorks@UMassAmherst (University of Massachusetts Amherst) (submittedVersion)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Thermal and Kinetic Analysis
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer Science and PVC
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
Keywords
segmented polyurethanes, thermal degradation, activation energy, soft segment length, degradation kinetics, structure-stability relationship, weight loss

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