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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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