A model study for the recovery of polyamides using the dissolution/reprecipitation technique

Papaspyrides, CD; Kartalis, CN

dc.contributor.author	Papaspyrides, CD	en
dc.contributor.author	Kartalis, CN	en
dc.date.accessioned	2014-03-01T01:15:26Z
dc.date.available	2014-03-01T01:15:26Z
dc.date.issued	2000	en
dc.identifier.issn	0032-3888	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13493
dc.subject.classification	Engineering, Chemical	en
dc.subject.classification	Polymer Science	en
dc.subject.other	HIGH-DENSITY POLYETHYLENE	en
dc.subject.other	RESTABILIZATION	en
dc.subject.other	COMPOSITES	en
dc.title	A model study for the recovery of polyamides using the dissolution/reprecipitation technique	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/pen.11225	en
heal.identifier.secondary	http://dx.doi.org/10.1002/pen.11225	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	A model dissolution/reprecipitation. process is studied for the recycling of both poly-epsilon-caprolactam (PA 6) and polyhexamethyleneadipamide (PA 6 6). This process comprises dissolution of each of the aforementioned polyamides in an appropriate solvent, reprecipitation by addition of a nonsolvent and finally recovery of the polymers through washing and drying. Dimethylsulfoxide/methyl-ethyl-ketone (DMSO/MEK) proved to be the most suitable solvent/nonsolvent system for the recovery of PA 6, while formic acid/methyl-ethyl-ketone was used as a potential pair of solvent/nonsolvent in the case of recovering PA 6 6. The recycled polyamides were evaluated in terms of the following characteristic properties: molecular weight (based on end-group analysis and intrinsic viscosity determination), crystallinity and grain size analysis. In all cases, the recycled materials present excellent retention of the properties studied. Finally, the solvent mixtures involved are separated by distillation for reuse.	en
heal.publisher	SOC PLASTICS ENG INC	en
heal.journalName	POLYMER ENGINEERING AND SCIENCE	en
dc.identifier.doi	10.1002/pen.11225	en
dc.identifier.isi	ISI:000086759300013	en
dc.identifier.volume	40	en
dc.identifier.issue	4	en
dc.identifier.spage	979	en
dc.identifier.epage	984	en