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

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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

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