Thermal behavior of some aromatic copolyethers containing a propylenic spacer-Reference-Cited by-同舟云学术

Thermal behavior of some aromatic copolyethers containing a propylenic spacer

Published:2005-03-01 Issue:1 Volume:3 Page:53-62
ISSN:2391-5420
Container-title:Open Chemistry
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Author:

Hurduc Nicolae¹,Damian Cristina²,Tarus Anca²,Toader Violeta¹,Hurduc Natalia²

Affiliation:

1. 1Department of Macromolecules, Technical University Iasi, Bd. Mangeron 71, 700050, Iasi, Romania

2. 2Department of Physical and Theoretical Chemistry, “A.I. Cuza” University Iasi, Bd. Carol 11, Iasi, Romania

Abstract

AbstractThe main objective of this paper is to study the thermal stability of some aromatic copolyethers containing a propylenic spacer. Some of the investigated copolyethers displayed a liquid crystalline (LC) behavior, with the presence of the mesogenic groups in the main chain, inducing high values of the thermal transition temperatures. As a consequence, a thermal stability study was necessary to establish the maximum temperature value for the LC behavior characterization. A thermal degradation mechanism is proposed, taking into consideration the azobenzenic unit as the weakest link in the polymer chain and thus, the starting point of the thermal degradation process. The degradation mechanisms were correlated with the chemical structure and the polarity and conformation of the chains. Conformational analysis was performed using molecular simulations. Freeman-Caroll and Coats-Redfern methods were used to calculate some kinetic characteristics.

Publisher

Walter de Gruyter GmbH

Subject

Materials Chemistry,General Chemistry

Link

http://link.springer.com/content/pdf/10.2478/BF02476237.pdf

Reference15 articles.

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