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Thermal analysis of polymeric materials looked at from the environmental and recycling point of view

  • Polymers
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Abstract

This paper presents DSC investigations on the curing kinetics of an epoxy-polyester (EP/PE) powder coating system with two different accelerators and on the crystallization behaviour of a semicrystalline thermoplastic containing regranulate. In addition thermal degradation and entropy relaxation effects of an amorphous, thermoplastic due to different injection moulding parameters are discussed. Thermogravimetry results are presented for quantitative analysis of rubber, and for elucidating problems which may arise during the injection moulding of thermoplastic regranulate which is obtained from painted rejects.

The measurements were carried out using NETZSCH DSC 200 (heat flux DSC) and thermobalances TG 439 and TG 209.

Zusammenfassung

Dieser Artikel beschreibt DSC-Untersuchungen an der Aushärtungskinetik eines Epoxid-Polyester (EP/PE) Pulverbeschichtungssystemes mit zwei verschiedenen Beschleunigen und am Kristallisationsverhalten eines semikristallinen Thermoplastes mit Regranulatanteil. Zusätzlich werden der thermische Abbau und Entropierelaxationseffekte eines amorphen Thermoplastes in Verbindung mit Parametern von verschiedenen Spritzgussverfahren diskutiert. Es werden TG-Ergebnisse für die quantitative Analyse von Gummi und für Aufhellungsprobleme dargelegt, die sich beim Spritzgiessen von thermoplastischem Regranulate aus gefärbtem Recycling-Material ergeben können.

Die Messungen wurden mittels eines NETZSCH DSC 200 (Wärmefluss DSC) und den Thermowaagen TG 439 und TG 209 durchgeführt.

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Authors and Affiliations

  1. Department of Plastics and Rubber Engineering, Fachhochschule Würzburg-Schweinfurt, Röntgenring 8, W-8700, Würzburg, FRG

    H. Möhler

  2. Netzsch-Gerätebau GMBH, Wittelsbacher Str. 45, W-8672, Selb, FRG

    E. Kaisersberger

Authors
  1. H. Möhler
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  2. E. Kaisersberger
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Möhler, H., Kaisersberger, E. Thermal analysis of polymeric materials looked at from the environmental and recycling point of view. Journal of Thermal Analysis 40, 807–820 (1993). https://doi.org/10.1007/BF02546655

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  • DOI: https://doi.org/10.1007/BF02546655

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