Solid-state hydrolysis of postconsumer polyethylene terephthalate after plasma treatment

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorMancini, Sandro Donnini
dc.creatorNogueira, Alex Rodrigues
dc.creatorRangel, Elidiane Cipriano
dc.creatorCruz, Nilson Cristino da
dc.date2014-05-27T11:28:21Z
dc.date2016-10-25T18:43:33Z
dc.date2014-05-27T11:28:21Z
dc.date2016-10-25T18:43:33Z
dc.date2013-02-05
dc.date.accessioned2017-04-06T02:12:44Z
dc.date.available2017-04-06T02:12:44Z
dc.identifierJournal of Applied Polymer Science, v. 127, n. 3, p. 1989-1996, 2013.
dc.identifier0021-8995
dc.identifier1097-4628
dc.identifierhttp://hdl.handle.net/11449/74558
dc.identifierhttp://acervodigital.unesp.br/handle/11449/74558
dc.identifier10.1002/app.37591
dc.identifierWOS:000310603100068
dc.identifier2-s2.0-84868486264
dc.identifier0000-0002-4287-1969
dc.identifierhttp://dx.doi.org/10.1002/app.37591
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/895321
dc.descriptionPlasma treatments were applied on the surface of postconsumer polyethylene terephthalate (PET) bottles to increase their wettability and hasten the subsequent hydrolysis process. Sixty-four treatments were tested by varying plasma composition (oxygen and air), power (25-130 W), pressure (50-200 mTorr), and time (1 and 5 min). The best treatment was the one applied in air plasma at 130 W and 50 mTorr for 5 min, as it provided the lowest contact angle, 9.4°. Samples of PET before and after the optimized plasma condition were subjected to hydrolysis at 205°C. Although the treatment changed only a thin surface layer, its influence was evident up to relatively high conversion rates, as the treated samples presented more than 40% higher conversion rates than the untreated ones after 2 h of reaction. Infrared spectroscopy showed that the terephthalic acid obtained from 99% of depolymerization was similar to the commercial product used in PET synthesis. © 2012 Wiley Periodicals, Inc.
dc.languageeng
dc.relationJournal of Applied Polymer Science
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectplasma treatment
dc.subjectpolyesters
dc.subjectrecycling
dc.subjectsurface modification
dc.subjectAir plasmas
dc.subjectCommercial products
dc.subjectConversion rates
dc.subjectHigh conversions
dc.subjectPlasma composition
dc.subjectPlasma conditions
dc.subjectPlasma treatment
dc.subjectSubsequent hydrolysis
dc.subjectTerephthalic acids
dc.subjectThin surface layer
dc.subjectContact angle
dc.subjectInfrared spectroscopy
dc.subjectPlasma applications
dc.subjectPolyesters
dc.subjectPolyethylene terephthalates
dc.subjectReaction rates
dc.subjectRecycling
dc.subjectSurface treatment
dc.subjectSynthesis (chemical)
dc.subjectHydrolysis
dc.titleSolid-state hydrolysis of postconsumer polyethylene terephthalate after plasma treatment
dc.typeOtro


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