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TG-DTA/FT-IR method for analyzing thermal decomposition mechanism of polyesters

  • Polymers
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Abstract

An attempt to estimate the thermal decomposition mechanism of polymers using the simultaneous TG-DTA/FT-IR system was summarized. The library search of FT-IR spectra at various temperatures and of the subtraction spectrum obtained by subtracting the spectra at different temperatures were used to determine the types of evolved gases from poly(ethylene terephthalate) and poly(butylene terephthalate) at given stages of decomposition. The quantitative analysis of evolved gases was carried out using the specific gas profiles at the specific absorption band. The kinetic parameters were estimated from both TG and spectroscopic curves measured at various heating rates.

Zusammenfassung

Mittels eines simultanen TG-DTA/FT-IR Systemes wurde ein Versuch zur Abschätzung des Mechanismus der thermischen Zersetzung von Polymeren unternommen und beschrieben. Zur Bestimmung des Types flüchtiger Substanzen, die in bestimmten Stadien der Zersetzung aus Poly(ethylen-terephthalat) und Poly(butylen-terephthalat) entstehen, wurden die FT-IR-Spektren bei verschiedenen Temperaturen und die Differenzspektren aus Subtraktion der Spektren bei verschiedenen Temperaturen in einem Spektrenverzeichnis gesucht. Die quantitative Analyse der freigesetzten Gase wurde unter Verwendung der spezifischen Gasprofile an den spezifischen Absorptionsbanden durchgeführt. Die kinetischen Parameter wurden anhand der TG-und der spektroskopischen Kurven für verschiedene Temperaturen geschätzt.

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Authors and Affiliations

  1. Scientific Instruments Division, Seiko Instruments Inc., 36-1 Takenoshita, Oyama-Cho, Sunto-Gun, 410-13, Shizuoka, Japan

    R. Kinoshita & Y. Teramoto

  2. Department of Industrial Chemistry, Tokyo Metropolitan University, Minami Ohsawa, 192-03, Hachioji-shi, Tokyo, Japan

    H. Yoshida

Authors
  1. R. Kinoshita
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  2. Y. Teramoto
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  3. H. Yoshida
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Kinoshita, R., Teramoto, Y. & Yoshida, H. TG-DTA/FT-IR method for analyzing thermal decomposition mechanism of polyesters. Journal of Thermal Analysis 40, 605–611 (1993). https://doi.org/10.1007/BF02546630

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  • DOI: https://doi.org/10.1007/BF02546630

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