New aspects on the mechanism of the solid state polyamidation of PA 6,6 salt

Papaspyrides, CD; Vouyiouka, SN; Bletsos, IV

dc.contributor.author	Papaspyrides, CD	en
dc.contributor.author	Vouyiouka, SN	en
dc.contributor.author	Bletsos, IV	en
dc.date.accessioned	2014-03-01T01:24:42Z
dc.date.available	2014-03-01T01:24:42Z
dc.date.issued	2006	en
dc.identifier.issn	0032-3861	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17408
dc.subject	Nylon 6,6 salt	en
dc.subject	Solid state polymerization	en
dc.subject	Thermogravimetric analysis	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Ammonium compounds	en
dc.subject.other	Crystalline materials	en
dc.subject.other	Polycondensation	en
dc.subject.other	Polymerization	en
dc.subject.other	Reaction kinetics	en
dc.subject.other	Solid state devices	en
dc.subject.other	Thermogravimetric analysis	en
dc.subject.other	Volatile organic compounds	en
dc.subject.other	Nylon 6,6 salt	en
dc.subject.other	Polycondensation water	en
dc.subject.other	Salt crystals	en
dc.subject.other	Solid state polymerization	en
dc.subject.other	Amines	en
dc.subject.other	polymer science	en
dc.title	New aspects on the mechanism of the solid state polyamidation of PA 6,6 salt	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.polymer.2005.12.041	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.polymer.2005.12.041	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	Hexamethylenediammonium adipate (PA 6,6 salt) was solid state polymerized in the temperature range of 158-190 degrees C, in a thermogravimetric analysis (TGA) chamber, which simulates a polyamidation reactor. A mechanism based on the role of the volatile component of the salt (i.e. hexamethylenediamine) is found to predominate: the diamine escapes along with polycondensation water, meanwhile this volatilization occurs earlier than the water formation, apparently resulting in an increase of the vacancy defects and of the nucleation sites in the salt crystals. In addition, critical reaction parameters, such as reaction time, temperature, surrounding gas and presence of catalyst in the starting material were investigated, so as to discern the rate-controlling mechanism of the process. Finally, proper SSP kinetics were studied taking into consideration the diamine loss occurred and SSP rate constants were calculated through a suitable rate expression. (c) 2005 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Polymer	en
dc.identifier.doi	10.1016/j.polymer.2005.12.041	en
dc.identifier.isi	ISI:000235522900010	en
dc.identifier.volume	47	en
dc.identifier.issue	4	en
dc.identifier.spage	1020	en
dc.identifier.epage	1027	en