Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/66015
Type: Artigo de periódico
Title: Evaluation of the thermophysical properties of modified and dyed poly(ethylene terephthalate) films
Author: Olenka, L
da Silva, EN
Santos, WLF
Muniz, EC
Rubira, AF
Cardoso, LP
Medina, AN
Miranda, LCM
Baesso, ML
Bento, AC
Abstract: In this work we report thermal diffusivity and specific heat measurements in N,N-dimethylacrylamide modified poly (ethylene terephthalate) (PET) films for incorporating the dye blue Samaron HGS. These thermophysical properties were studied by changing the sample preparation conditions, such as the temperature and time of N,N-dimethylacrylamide treatment, and the time and temperature of dyeing. The results showed that the heat conduction was improved when the PET film was dyed at a temperature below the glass transition (T < 70 <degrees>C). On the other hand the thermal diffusivity decreased for samples dyed at T > 70 degreesC. This behaviour can be attributed to microstructure changes in the polymer chains, as shown by the change in the amorphous/crystalline ratio, observed in the x-ray diffraction data.
Country: Inglaterra
Editor: Iop Publishing Ltd
Rights: fechado
Identifier DOI: 10.1088/0022-3727/34/15/302
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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