Pure component recovery from polyamide 6/6 6 mixtures by selective dissolution and reprecipitation

Kartalis, CN; Poulakis, JG; Tsenoglou, CJ; Papaspyrides, CD

dc.contributor.author	Kartalis, CN	en
dc.contributor.author	Poulakis, JG	en
dc.contributor.author	Tsenoglou, CJ	en
dc.contributor.author	Papaspyrides, CD	en
dc.date.accessioned	2014-03-01T01:18:16Z
dc.date.available	2014-03-01T01:18:16Z
dc.date.issued	2002	en
dc.identifier.issn	0021-8995	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14900
dc.subject	Dissolution/reprecipitation	en
dc.subject	Poly-ε-caproamide	en
dc.subject	Polyamides	en
dc.subject	Polyhexamethyleneadipamide	en
dc.subject	Recovery	en
dc.subject	Solvent-based recycling	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Addition reactions	en
dc.subject.other	Composition	en
dc.subject.other	Crystallization	en
dc.subject.other	Differential scanning calorimetry	en
dc.subject.other	Dissolution	en
dc.subject.other	Hydrolysis	en
dc.subject.other	Mixtures	en
dc.subject.other	Molecular weight	en
dc.subject.other	Precipitation (chemical)	en
dc.subject.other	Recovery	en
dc.subject.other	Thermal effects	en
dc.subject.other	Viscosity measurement	en
dc.subject.other	Crystallizability	en
dc.subject.other	Dilute solution viscometry	en
dc.subject.other	End-group analysis	en
dc.subject.other	Molecular weight preservation	en
dc.subject.other	Polyamide mixtures	en
dc.subject.other	Pure component recovery	en
dc.subject.other	Reprecipitation	en
dc.subject.other	Selective dissolution	en
dc.subject.other	Polyamides	en
dc.subject.other	dissolution	en
dc.subject.other	polyamide	en
dc.subject.other	precipitation	en
dc.subject.other	recovery technique	en
dc.subject.other	recycling	en
dc.title	Pure component recovery from polyamide 6/6 6 mixtures by selective dissolution and reprecipitation	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/app.11147	en
heal.identifier.secondary	http://dx.doi.org/10.1002/app.11147	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	A selective dissolution/reprecipitation technique was applied for the effective recovery of Polyamide 6 (PA 6) and Polyamide 6 6 (PA 6 6) from their mixtures. The proposed process comprises mainly selective polyamide dissolution in an appropriate solvent at a specific temperature, reprecipitation of the polymer from the solution by addition of a nonsolvent, washing, and drying. A model mixture of virgin PA 6 and PA 6 6 pellets was initially tried, whereas in a following stage the selective dissolution technique was applied for the recovery of a PA-copolymer layer from a three-layered bottle end product also containing HDPE and EVA. End-group analysis, dilute solution viscometry, and differential scanning calorimetry were used to assess the molecular weight preservation and crystallizability of the recycled polyamides. The recycled materials demonstrated excellent retention of the properties studied, although in the copolymer case, due to hydrolysis, a molecular weight decrease was detected, accompanied with a slight compositional shift, favoring the PA6 6 presence in the final product. (C) 2002 Wiley Periodicals, Inc.	en
heal.publisher	JOHN WILEY & SONS INC	en
heal.journalName	Journal of Applied Polymer Science	en
dc.identifier.doi	10.1002/app.11147	en
dc.identifier.isi	ISI:000178107300017	en
dc.identifier.volume	86	en
dc.identifier.issue	8	en
dc.identifier.spage	1924	en
dc.identifier.epage	1930	en