A mathematical model for computer simulation of the production of unsaturated polyesters with catalysts

Simitzis, J

dc.contributor.author	Simitzis, J	en
dc.date.accessioned	2014-03-01T01:07:02Z
dc.date.available	2014-03-01T01:07:02Z
dc.date.issued	1988	en
dc.identifier.issn	0014-3057	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/9762
dc.subject	Computer Simulation	en
dc.subject	Mathematical Model	en
dc.subject.classification	Polymer Science	en
dc.title	A mathematical model for computer simulation of the production of unsaturated polyesters with catalysts	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0014-3057(88)90184-X	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0014-3057(88)90184-X	en
heal.language	English	en
heal.publicationDate	1988	en
heal.abstract	A new method is described for following the polyesterification of propylene glycol with adipic acid or with maleic anhydride/adipic acid (70:30) by using p-toluensulphonic acid or zinc acetate as catalyst. This method is based on the volumetric measurement of the water produced during the polyesterification following appropriate heating programs. The kinetics of the reaction according to the measurements in the isothermal phases were examined; it was found that the reaction order was two in all cases and that the activation energy E and the frequency factor ko have lower values than in the case of the exclusive use of adipic acid, and also by using p-toluensulphonic acid as compared to the corresponding cases using zinc acetate. The values of E, ko and order consititute the fundamental parameters of a mathematical equation including also a correction factor Z (depending mainly on the heating rate). According to this equation, the water produced at various stages can be very well simulated. There are obvious applications of this method in connection with the automation for the industrial production of unsaturated polyesters by using a catalyst having the advantages of carrying out the reaction at lower temperatures and reduced total time in comparison with the corresponding non-catalyzed reaction. © 1988.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	European Polymer Journal	en
dc.identifier.doi	10.1016/0014-3057(88)90184-X	en
dc.identifier.isi	ISI:A1988Q583400015	en
dc.identifier.volume	24	en
dc.identifier.issue	10	en
dc.identifier.spage	999	en
dc.identifier.epage	1003	en