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Self‐Association and Degree of Branching: Fluorescence‐Probe Study of Hyperbranched Poly(sulfone‐amine)s in Aqueous Solution
Author(s) -
Gao Chao,
Yan Deyue,
Chen Wei
Publication year - 2002
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/1521-3927(20020501)23:8<465::aid-marc465>3.0.co;2-o
Subject(s) - branching (polymer chemistry) , monomer , amine gas treating , sulfone , fluorescence , pyrene , aqueous solution , excimer , polymer chemistry , chemistry , photochemistry , branching fraction , materials science , polymer , organic chemistry , physics , optics , atomic physics
Pyrene is used as a fluorescence probe to investigate the self‐association behavior of poly(sulfone‐amine)s with various degrees of branching (DB). The ratio of excimer to monomer emission intensity increases gradually with DB, passes through a critical point at a DB of about 35%, and then increases dramatically. The study reveals that the higher DB, the stronger the association.