Effect of composition and polyesterification catalysts on the optical properties of cured polyesters

Simitzis, J; Zoumpoulakis, L; Soulis, S

dc.contributor.author	Simitzis, J	en
dc.contributor.author	Zoumpoulakis, L	en
dc.contributor.author	Soulis, S	en
dc.date.accessioned	2014-03-01T01:17:45Z
dc.date.available	2014-03-01T01:17:45Z
dc.date.issued	2002	en
dc.identifier.issn	0959-8103	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14650
dc.subject	Colour	en
dc.subject	Curing	en
dc.subject	Isomerization	en
dc.subject	Polymerization catalysts	en
dc.subject	Unsaturated polyesters	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Carboxylic acids	en
dc.subject.other	Catalysts	en
dc.subject.other	Composition	en
dc.subject.other	Differential scanning calorimetry	en
dc.subject.other	Fourier transform infrared spectroscopy	en
dc.subject.other	Isomerization	en
dc.subject.other	Polyethylene glycols	en
dc.subject.other	Synthesis (chemical)	en
dc.subject.other	Polyesterification catalysts	en
dc.subject.other	Polyesters	en
dc.subject.other	catalyst	en
dc.subject.other	curing	en
dc.subject.other	polyester	en
dc.subject.other	polymerization	en
dc.subject.other	resin	en
dc.title	Effect of composition and polyesterification catalysts on the optical properties of cured polyesters	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/pi.825	en
heal.identifier.secondary	http://dx.doi.org/10.1002/pi.825	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	Unsaturated polyesters based on ethylene glycol have been synthesized using a variety of anhydride, saturated and unsaturated dicarboxylic acids and various catalysts. The structure of the polyesters and the effect of the different compositions on the colour of cured polyesters are studied by FTIR, DSC and colorimetry. The structure of cured polyesters greatly depends on the isomerization of maleic acid to fumaric acid during polyesterification. The colour of unsaturated polyesters cured with the most common curing system (MEKP as initiator and CoNp as accelerator) is firstly influenced by the curing accelerator CoNp via the d-d transitions of the transition metal cobalt. Secondly, the composition of the dicarboxylic acids and anhydride used in the polyesterification influences the colour of the polyesters which depends especially on the isomerization of maleic acid. The cured maleate polyesters have more unreacted double bonds and more polar structure because of the presence of carbonyl groups, compared to the corresponding fumarate polyesters, and this structure affects the colour. The residual catalysts from the polyesterification have minor influence on the colour of cured polyesters. Copyright (C) 2002 Society of Chemical Industry.	en
heal.publisher	JOHN WILEY & SONS LTD	en
heal.journalName	Polymer International	en
dc.identifier.doi	10.1002/pi.825	en
dc.identifier.isi	ISI:000175026200004	en
dc.identifier.volume	51	en
dc.identifier.issue	4	en
dc.identifier.spage	297	en
dc.identifier.epage	307	en