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Physical gelation processes revealed by fluorescence technique
Author(s) -
Itagaki Hideyuki
Publication year - 2001
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200103)166:1<13::aid-masy13>3.0.co;2-5
Subject(s) - decalin , fluorescence , polystyrene , tacticity , molecule , polymer , solvent , materials science , photochemistry , chemistry , organic chemistry , optics , physics , catalysis , polymerization
The structure of an isotactic polystyrene (iPS) chain in its thermoreversible gel formed with trans‐ and cis‐decalin was determined to be of 3 1 ‐helical form or near 3 1 ‐helical form by monitoring the fluorescence behavior of iPS. The fluorescence depolarization measurements of five fluorescent molecules having different molecular sizes doped into iPS in decalin clearly showed that there is enough space for decalin molecules to intercalate among the iPS helical chains. Our fluorescence data support the idea that a polymer‐solvent compound that can be described by a ladder‐like model is formed in iPS‐decalin gels.