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Dissolution of latex films after γ‐ray treatment
Author(s) -
Aydin K.,
Adiyaman N.,
Uğur Ş.,
Pekcan Ö.
Publication year - 2001
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.2235
Subject(s) - dissolution , annealing (glass) , glass transition , materials science , desorption , analytical chemistry (journal) , polymer , irradiation , methyl methacrylate , polymer chemistry , nuclear chemistry , chemistry , copolymer , chromatography , composite material , adsorption , physics , nuclear physics
Latex films were prepared by annealing pyrene (Py)‐labeled poly(methyl methacrylate) particles at glass‐transition temperature (100°C). These films were then irradiated by γ‐rays from 60 Co in a gamma cell at room temperature at the same dose rate (rad/h) for 30 min. Before dissolution films were annealed at elevated temperatures for a 30‐min time interval to complete the film formation process. Steady‐state fluorescence (SSF) technique were used to monitor the dissolution of these irradiated latex films. The dissolution of films in chloroform–heptane (80–20%) mixture was monitored in real time by the Py fluorescence intensity change. Relaxation constants k 0 and desorption coefficients D d of polymer chains were measured. It was observed that both D d and k 0 values first increased and then decreased by increasing the annealing temperature. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 129–137, 2002