Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/75282
Type: Artigo de periódico
Title: STUDY OF LOW-DENSITY POLYETHYLENE-POLY(VINYL CHLORIDE) BLEND SECONDARY RELAXATIONS BY PHOTOLUMINESCENCE
Author: MARTINSFRANCHETTI, SM
ATVARS, TDZ
Abstract: Secondary relaxations of low density polyethylene-poly(vinyl chloride) blends with various proportions of components (1:9, 1:1 and 9:1 w/w) were studied by photoluminescence of anthracene molecules dissolved in the bulk polymer. The temperatures of the relaxation processes were determined by the ratio of the vibronic components of the fluorescence band on the temperature. The molecular mechanism of this relaxation involves motions of short segments of the polymer chains. These blends show phase separation in the solid state which is observed by fluorescence optical microscopy. It is also noted that the distribution of anthracene molecules in the blends is not homogeneous and it is mostly concentrated in the polyethylene domains.
Country: Inglaterra
Editor: Pergamon-elsevier Science Ltd
Rights: fechado
Identifier DOI: 10.1016/0014-3057(94)00182-0
Date Issue: 1995
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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