Article (Scientific journals)
Evaluation of nonradiative energy transfer as a means of probing polymer miscibility and polymer phase separation
Henrioulle-Granville, M.; Kyuda, K.; Jérôme, Robert et al.
1990In Macromolecules, 23 (4), p. 1202-1207
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Keywords :
Mixtures--Physical Chemistry; Polymethyl methacrylate; Polyvinyl chloride; Miscibility; Nonradiative Energy Transfer; Phase Separation; Polymer Blends; Tacticity; Polymers
Abstract :
[en] The ability of nonradiative energy transfer (NRET) to probe polymer miscibility and polymer phase separation is discussed for blends of PVC and PMMA of various tacticity. The sensitivity of that fluorescence technique depends on the range between the lower (total miscibility) and the upper value (complete immiscibility) of the ratio of the intensity emitted by naphthalene and anthracene (IN/IA) used to label PVC and PMMA, respectively. Although measurements of the lower limit are reproducible, determination of the upper limit is quite a problem, making uncertain the analysis of any system phase separated on a scale of at least 2-3 nm. At and above this dimension, solvent-cast PVC/PMMA blends appear to be completely miscible whatever the PMMA tacticity. That the IN/IA ratio of the PVC/PMMA blends changes with the tacticity of PMMA is interpreted as an effect of chain conformation on the probability of intermolecular interactions. For instance, the more rigid the PMMA is in relation to its tacticity, the more extended the intermolecular contacts with PVC see blend above the LCST does not lead to an increase in the IN/IA ratio great enough to detect phase separation. © 1990, American Chemical Society. All rights reserved.
Disciplines :
Chemistry
Author, co-author :
Henrioulle-Granville, M.;  Laboratory of Macromolecular Chemistry and Organic Catalysis, University of Liége, United States
Kyuda, K.;  Laboratory of Macromolecular Chemistry and Organic Catalysis, University of Liége, United States
Jérôme, Robert ;  Université de Liège - ULiège > Département de chimie (sciences) > Département de chimie (sciences)
Teyssié, Philippe ;  Université de Liège - ULiège > Relations académiques et scientifiques (Sciences)
De Schryver, Frans C.;  Laboratory of Molecular Dynamics and Spectroscopy, KU Leuven, Department of Chemistry, United States
Language :
English
Title :
Evaluation of nonradiative energy transfer as a means of probing polymer miscibility and polymer phase separation
Publication date :
1990
Journal title :
Macromolecules
ISSN :
0024-9297
eISSN :
1520-5835
Publisher :
American Chemical Society, United States - District of Columbia
Volume :
23
Issue :
4
Pages :
1202-1207
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 05 December 2019

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