Solid state polyamidation processes

Papaspyrides Constantine, D

dc.contributor.author	Papaspyrides Constantine, D	en
dc.date.accessioned	2014-03-01T01:09:03Z
dc.date.available	2014-03-01T01:09:03Z
dc.date.issued	1992	en
dc.identifier.issn	0959-8103	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/10812
dc.subject	HEXAMETHYLENEDIAMMONIUM ADIPATE	en
dc.subject	SOLID STATE POLYCONDENSATION (POLYAMIDATION)	en
dc.subject	ACID CATALYSTS	en
dc.subject	SOLID MELT TRANSITION	en
dc.subject	WATER ACCUMULATION	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Catalysts	en
dc.subject.other	Nylon polymers	en
dc.subject.other	Polymerization	en
dc.subject.other	Reaction kinetics	en
dc.subject.other	Nylon salts	en
dc.subject.other	Polyamidation	en
dc.subject.other	Solid state polymerization	en
dc.subject.other	Polyamides	en
dc.title	Solid state polyamidation processes	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/pi.4990290409	en
heal.identifier.secondary	http://dx.doi.org/10.1002/pi.4990290409	en
heal.language	English	en
heal.publicationDate	1992	en
heal.abstract	Low reaction rates and distinct transition phenomena from the solid to the melt state restrain solid state polymerisation (SSP) reactions of nylon salts for industrial application. To alleviate these problems, catalysts containing nylon salts are employed. In this study, hexamethylenediammonium adipate (HMA) particles were used containing a strictly controlled amount of catalyst, either phosphoric acid, sulphuric acid or boric acid. The results show considerable acceleration of the reaction rate, especially in the presence of boric acid, while the solid state character of the process is maintained throughout the total course of the reaction. Comparative polymerisation runs were monitored both by end-group and quantitative water determinations of the reacting material to exclude any accumulation of the water of polycondensation within the reacting particles. The results obtained support further the mechanism proposed for the transition solid-melt in SSP runs of nylon salts in the absence of catalysts. In the latter case extended water accumulation is the rule.	en
heal.publisher	JOHN WILEY & SONS LTD	en
heal.journalName	Polymer International	en
dc.identifier.doi	10.1002/pi.4990290409	en
dc.identifier.isi	ISI:A1992JK87800008	en
dc.identifier.volume	29	en
dc.identifier.issue	4	en
dc.identifier.spage	293	en
dc.identifier.epage	298	en