Influence of residual polyesterification catalysts on the curing of polyesters

Simitzis, JCh; Zoumpoulakis, LTh; Soulis, SK; Mendrinos, LN

dc.contributor.author	Simitzis, JCh	en
dc.contributor.author	Zoumpoulakis, LTh	en
dc.contributor.author	Soulis, SK	en
dc.contributor.author	Mendrinos, LN	en
dc.date.accessioned	2014-03-01T02:41:54Z
dc.date.available	2014-03-01T02:41:54Z
dc.date.issued	2001	en
dc.identifier.issn	0026-3672	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30662
dc.subject	Catalytic polyesterification	en
dc.subject	Kinetics of curing	en
dc.subject	Unsaturated polyester	en
dc.subject.classification	Chemistry, Analytical	en
dc.subject.other	adipic acid	en
dc.subject.other	dicarboxylic acid	en
dc.subject.other	ketone derivative	en
dc.subject.other	lead	en
dc.subject.other	lead dioxide	en
dc.subject.other	maleic acid	en
dc.subject.other	metal derivative	en
dc.subject.other	metal oxide	en
dc.subject.other	methylketone peroxide	en
dc.subject.other	naphthenate cobalt	en
dc.subject.other	phthalic acid	en
dc.subject.other	polyester	en
dc.subject.other	resin	en
dc.subject.other	styrene	en
dc.subject.other	sulfonic acid derivative	en
dc.subject.other	toluenesulfonic acid	en
dc.subject.other	unclassified drug	en
dc.subject.other	zinc acetate	en
dc.subject.other	acceleration	en
dc.subject.other	catalyst	en
dc.subject.other	chemical analysis	en
dc.subject.other	color	en
dc.subject.other	conference paper	en
dc.subject.other	cross linking	en
dc.subject.other	differential scanning calorimetry	en
dc.subject.other	esterification	en
dc.subject.other	heat transfer	en
dc.subject.other	kinetics	en
dc.subject.other	polymerization	en
dc.subject.other	stoichiometry	en
dc.subject.other	synthesis	en
dc.title	Influence of residual polyesterification catalysts on the curing of polyesters	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1007/s006040170049	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s006040170049	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	Unsaturated polyesters are synthesized by means of polyesterification, often with catalysts like strong acids, metal oxides and metal-organic salts. Most often, the catalysts used cannot be separated from the bulk of the polyester. Also, some organic or inorganic additives - called fillers - which are used with the polyester in order to decrease cost, affect the curing of the polyester. In this work the effect of residual catalyst on the curing of unsaturated polyester is studied. Unsaturated polyesters were prepared using propylene glycol with a 10% molar excess over stoichiometry and a mixture of dicarboxylic acids, namely maleic acid (unsaturated) adipic acid (saturated) and phthalic anhydride (saturated) at a molar ratio 1:2:2. Lead dioxide, p-toluenesulfonic acid and zinc acetate were used as catalysts, at 0.1% w/w. After the polyesterification, the polymers were diluted with styrene at a proportion of 100:30 w/w. The resins were cured by using MEKP (methylethylketone peroxide) as initiator and CoNp (cobalt naphthenate) as accelerator. Catalysts affect the final color of the polyester. The kinetics of curing of the resins was studied by DSC analysis based on the exothermic peak due to the double bonds breaking to give crosslinked macromolecules. The heat released DeltaH is decreased by the presence of catalyst, while activation energy, the frequency factor and the order of reaction are increased.	en
heal.publisher	SPRINGER-VERLAG WIEN	en
heal.journalName	Mikrochimica Acta	en
dc.identifier.doi	10.1007/s006040170049	en
dc.identifier.isi	ISI:000169798600013	en
dc.identifier.volume	136	en
dc.identifier.issue	3-4	en
dc.identifier.spage	171	en
dc.identifier.epage	174	en