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Fast transient fluorescence technique (FTRT) for studying dissolution of polymer glasses
Author(s) -
Pekcan Ö.,
Uğur Ş.
Publication year - 1999
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/(sici)1097-4628(19991024)74:4<948::aid-app21>3.0.co;2-d
Subject(s) - dissolution , swelling , methyl methacrylate , anthracene , polymer , fluorescence , quenching (fluorescence) , materials science , polymerization , polymer chemistry , analytical chemistry (journal) , photochemistry , chemical engineering , chemistry , organic chemistry , composite material , physics , engineering , quantum mechanics
The fast transient fluorescence technique (FTRT) was used for studying the swelling and dissolution of a glassy polymer formed by free‐radical polymerization of methyl methacrylate (MMA). Anthracene (An) was introduced during polymerization as a fluorescence probe to monitor swelling and dissolution. Swelling and dissolution processes of disc‐shaped poly(methyl methacrylate) (PMMA) glasses in a chloroform–heptane mixture were monitored by measuring the fluorescence lifetimes of An from its decay traces. A method is developed for low quenching efficiencies for measuring lifetimes, τ, of An, and it was observed that τ values decreased as the dissolution process proceeded. Desorption, D , and mutual diffusion, D m , coefficients of An molecules were measured during dissolution of PMMA and found to be around 5.4 × 10 −6 (cm 2 /s) and 2.2 × 10 −5 (cm 2 /s), respectively. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 948–957, 1999