Solid state polyamidation of hexamethylenediammonium adipate. II. The influence of acid catalysts

Katsikopoulos, PV; Papaspyrides, CD

dc.contributor.author	Katsikopoulos, PV	en
dc.contributor.author	Papaspyrides, CD	en
dc.date.accessioned	2014-03-01T01:10:17Z
dc.date.available	2014-03-01T01:10:17Z
dc.date.issued	1994	en
dc.identifier.issn	0887-624X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11354
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.classification	Polymer Science	en
dc.subject.other	Ammonium compounds	en
dc.subject.other	Catalysts	en
dc.subject.other	Condensation reactions	en
dc.subject.other	Inorganic acids	en
dc.subject.other	Nylon polymers	en
dc.subject.other	Phase transitions	en
dc.subject.other	Polymerization	en
dc.subject.other	Reaction kinetics	en
dc.subject.other	Solids	en
dc.subject.other	Temperature	en
dc.subject.other	Concentration (solutions)	en
dc.subject.other	Hexamethylene diammonium adipate	en
dc.subject.other	Polyamidation	en
dc.subject.other	Solid melt transition	en
dc.subject.other	Solid state polymerization	en
dc.subject.other	Polyamides	en
dc.title	Solid state polyamidation of hexamethylenediammonium adipate. II. The influence of acid catalysts	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/pola.1994.080320306	en
heal.identifier.secondary	http://dx.doi.org/10.1002/pola.1994.080320306	en
heal.language	English	en
heal.publicationDate	1994	en
heal.abstract	Loss of diamine and distinct transition phenomena from the solid to the melt state restrain solid-state polymerization (SSP) of nylon salts from industrial application. To depress these phenomena temperatures well below the melting point of the starting material are employed, resulting however in low reaction rates. The need to use catalysts arises and accordingly in this study hexamethylenediammonium adipate (HMA) particles were polymerized containing a strictly controlled amount of uniformly distributed catalyst. The catalysts included boric, sulphuric, and phosphoric acids with boric acid being the most effective in accelerating the reaction while eliminating the tendency to agglomeration. In general, catalyst concentration up to a critical value plays a considerable role in the overall behavior. Furthermore, in agreement with non catalytic processes, the reaction temperature remains an influential parameter. (C) 1994 John Wiley & Sons, Inc.	en
heal.publisher	JOHN WILEY & SONS INC	en
heal.journalName	Journal of Polymer Science, Part A: Polymer Chemistry	en
dc.identifier.doi	10.1002/pola.1994.080320306	en
dc.identifier.isi	ISI:A1994MR78500006	en
dc.identifier.volume	32	en
dc.identifier.issue	3	en
dc.identifier.spage	451	en
dc.identifier.epage	456	en