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Type: Artigo de periódico
Title: Characterization of poly(ethylene terephtalate) after multiple processing cycles
Author: Spinace, MAS
De Paoli, MA
Abstract: Poly(ethylene terephthalate) (PET) pellets used for production of soft drink battles were reprocessed in a single-screw extruder and cut into pellets in five processing cycles. The reprocessed pellets were characterized by its rheological, mechanical, and thermal. properties. Carboxylic end groups number concentration and melt flow index were also determined. After three reprocessing cycles the mechanical properties and crystallinity degree changed drastically. Moreover, after five cycles we did not observe changes in the onset temperature of mass loss; therefore, the samples were thermally stable. However, an increase in melt flow index and carboxylic end groups concentration indicated a certain degree of mechanochemical degradation. (C) 2001 John Wiley & Sons, Inc.
Subject: PET
Country: EUA
Editor: John Wiley & Sons Inc
Citation: Journal Of Applied Polymer Science. John Wiley & Sons Inc, v. 80, n. 1, n. 20, n. 25, 2001.
Rights: fechado
Identifier DOI: 10.1002/1097-4628(20010404)80:1<20
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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