Non-isothermal depolymerisation kinetics of poly(ethylene oxide)

[img]
Preview
PDS PEO NIK R1.pdf - Accepted Version (397kB) | Preview

Cran, Marlene ORCID: 0000-0002-6000-8093, Gray, Stephen R, Scheirs, John and Bigger, Stephen W (2011) Non-isothermal depolymerisation kinetics of poly(ethylene oxide). Polymer Degradation and Stability, 96 (8). pp. 1497-1502. ISSN 0141-3910

Abstract

The depolymerisation of low molecular weight poly(ethylene oxide) (PEO) under mild conditions was studied using a linear temperature ramped non-isothermal technique and the results compared with those obtained from a conventional isothermal technique. The analysis of the non-isothermal kinetic (NIK) data was performed using an original computer program incorporating an algorithm that systematically minimizes the sum of the squares of the residuals between the experimental data and the calculated theoretical kinetic profile in order to extract the kinetic parameters. The results revealed that the depolymerisation of PEO proceeds in accordance with the Ekenstam model and follows the Arrhenius equation over the temperature range of ca. 40–130 °C. The NIK analysis resulted in a two-dimensional convergence to produce a unique solution set for the kinetic parameters of Ea = 89.4 kJ mol−1 and A = 9.6 × 106 h−1. These data are consistent with the results obtained from the isothermal experiments. It is proposed that NIK analysis is a quick and reliable means of obtaining kinetic parameters relevant to lifetime predictions in polymers whose degradation behaviour can be considered to be close to ideal.

Dimensions Badge

Altmetric Badge

Item type Article
URI https://vuir.vu.edu.au/id/eprint/7667
DOI https://doi.org/10.1016/j.polymdegradstab.2011.05.004
Official URL http://www.sciencedirect.com/science/article/pii/S...
Subjects Historical > Faculty/School/Research Centre/Department > School of Engineering and Science
Historical > FOR Classification > 0303 Macromolecular and Materials Chemistry
Historical > SEO Classification > 970103 Expanding Knowledge in the Chemical Sciences
Keywords ResPubID22911, non-isothermal kinetics, poly(ethylene oxide) PEO, depolymerisation, lifetime prediction, thermal degradation
Citations in Scopus 5 - View on Scopus
Download/View statistics View download statistics for this item

Search Google Scholar

Repository staff login