Modification of glass transition and liquid—liquid transition in PMMA doped with fluorescent dyes
作者:
A. Chafa,
D. Chatain,
J. Dugas,
C. Lacabanne,
E. Vayssi,
期刊:
Journal of Macromolecular Science, Part B
(Taylor Available online 1983)
卷期:
Volume 22,
issue 5-6
页码: 633-643
ISSN:0022-2348
年代: 1983
DOI:10.1080/00222348308245747
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
PMMA doped with fluorescent dyes presents important modifications of thermally stimulated current spectra at high temperature. Glass and liquid-liquid transitions are no longer resolved and only one intense peak appears at 127°C. This peak cannot be resolved by the thermal sampling method. It has an Arrhenius behavior, and the plot of τ(1/T) shows the existence of a compensation phenomenon with a characteristic temperature which does not depend on the dye concentration. The modification is induced even if the dye concentration is as weak as some 10s of ppm. Thus it cannot be considered as a plasticization effect.
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