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Polymers and Polymer Composites

THERMAL DEGRADATION OF POLYURETHANE BICOMPONENT SYSTEMS IN CONTROLLED ATMOSPHERES

January 1, 2005 By: Ketata N; Sanglar C; Waton H; Alamercery S; Delolme F; Raffin G; Grenier-Loustalot M F Research article

Title: THERMAL DEGRADATION OF POLYURETHANE BICOMPONENT SYSTEMS IN CONTROLLED ATMOSPHERES
Page Range: p.1-26
Author(s): Ketata N; Sanglar C; Waton H; Alamercery S; Delolme F; Raffin G; Grenier-Loustalot M F
File size: 353K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 13
Issue No: No. 1

Abstract
The thermal behaviour of bicomponent polyurethanes in conditions of controlled atmosphere and temperature was characterised by determining their heat stability using on-line TGA/FT-IR coupling and off-line TGA/TCT/GC/MS coupling in order to identify the volatile compounds released. Degradation residues were analysed by FT-IR and MALDI-TOF mass spectrometry. A major disadvantage of these thermoplastic elastomers is that one of the components, isocyanate, is toxic. Based on the data obtained with model urethane compounds (para-TI-based) and bicomponent polyurethane polymer (MDI and PEG-based), this paper demonstrates that the thermal degradations are different. Since the various applications to which these materials are applied and the fact that they are exposed to extreme working conditions, reaction mechanisms for their degradation are proposed. 47 refs.

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