Designing thermoplastic oligomers with programmed degradation mechanisms using a combined empirical and simulation approach

Hamerton, I, Howlin, BJ and Yeung, S-YC (2013) Designing thermoplastic oligomers with programmed degradation mechanisms using a combined empirical and simulation approach Polymer Degradation and Stability, 98 (4). pp. 829-838.

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Abstract

Molecular simulation is used to probe the structure property relationships displayed by polysulphone (PS) and polyethersulphone (PES) and reproduces closely the temperatures at which thermal degradation occurs (and the glass transition temperatures). Both data sets agree well with those obtained empirically using TGA. The examination of the thermal and thermo-oxidative stability of thermoplastic oligomers (M = 5454-33,866 g mol , PDI 1.33-1.82) based on PS, PES, polyetherimide (PEI) and poly(amide-imide) (PAI), is reported. TGA reveals the least thermally stable polymer is PES (T = ∼250 °C), while PAI (T = ∼350 °C) is the highest: the materials usually display two-step decomposition patterns: scission of bridging group and degradation of backbone structure. A possible mechanism for the degradation of a PAI is proposed on the basis of the empirical and simulation data. This work provides a general method for the prediction of the thermal stability of oligomeric modifiers (and high molecular weight polymers). © 2013 Elsevier Ltd. All rights reserved.

Item Type:	Article
Authors :	Name Email ORCID Hamerton, I Howlin, BJ Yeung, S-YC
Date :	April 2013
DOI :	10.1016/j.polymdegradstab.2012.12.020
Depositing User :	Symplectic Elements
Date Deposited :	28 Mar 2017 13:24
Last Modified :	28 Mar 2017 13:24
URI:	http://epubs.surrey.ac.uk/id/eprint/804231

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