dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-05-27T11:28:21Z | |
dc.date.accessioned | 2022-10-05T18:43:41Z | |
dc.date.available | 2014-05-27T11:28:21Z | |
dc.date.available | 2022-10-05T18:43:41Z | |
dc.date.created | 2014-05-27T11:28:21Z | |
dc.date.issued | 2013-02-05 | |
dc.identifier | Journal of Applied Polymer Science, v. 127, n. 3, p. 1989-1996, 2013. | |
dc.identifier | 0021-8995 | |
dc.identifier | 1097-4628 | |
dc.identifier | http://hdl.handle.net/11449/74558 | |
dc.identifier | 10.1002/app.37591 | |
dc.identifier | WOS:000310603100068 | |
dc.identifier | 2-s2.0-84868486264 | |
dc.identifier | 7157327220048138 | |
dc.identifier | 0000-0002-4287-1969 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/3923512 | |
dc.description.abstract | Plasma 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.language | eng | |
dc.relation | Journal of Applied Polymer Science | |
dc.relation | 1.901 | |
dc.relation | 0,543 | |
dc.relation | 0,543 | |
dc.rights | Acesso restrito | |
dc.source | Scopus | |
dc.subject | plasma treatment | |
dc.subject | polyesters | |
dc.subject | recycling | |
dc.subject | surface modification | |
dc.subject | Air plasmas | |
dc.subject | Commercial products | |
dc.subject | Conversion rates | |
dc.subject | High conversions | |
dc.subject | Plasma composition | |
dc.subject | Plasma conditions | |
dc.subject | Plasma treatment | |
dc.subject | Subsequent hydrolysis | |
dc.subject | Terephthalic acids | |
dc.subject | Thin surface layer | |
dc.subject | Contact angle | |
dc.subject | Infrared spectroscopy | |
dc.subject | Plasma applications | |
dc.subject | Polyesters | |
dc.subject | Polyethylene terephthalates | |
dc.subject | Reaction rates | |
dc.subject | Recycling | |
dc.subject | Surface treatment | |
dc.subject | Synthesis (chemical) | |
dc.subject | Hydrolysis | |
dc.title | Solid-state hydrolysis of postconsumer polyethylene terephthalate after plasma treatment | |
dc.type | Artigo | |