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Fluorescence method of studying void closure kinetics during film formation from high‐T latex particles
Author(s) -
Pekcan Önder,
Canpolat Murat
Publication year - 1997
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(19971024)66:4<655::aid-app5>3.0.co;2-r
Subject(s) - void (composites) , materials science , fluorescence , kinetics , annealing (glass) , copolymer , methyl methacrylate , glass transition , polymer chemistry , composite material , analytical chemistry (journal) , chemistry , polymer , optics , chromatography , physics , quantum mechanics
Void closure process due to viscous flow was studied during film formation from high‐T latex particles. Steady‐state fluorescence and photon transmission techniques were used to probe the evolution of optical clarity during film formation. The latex films were prepared from pyrene (P)‐labeled poly(methyl methacrylate) particles and annealed in 10‐min time intervals above glass transition temperature. Fluorescence intensity from P was measured after each annealing step. A relation for void closure time versus fluorescence intensity was derived, using the Vogel—Fulcher equation. Viscosity constant B was measured from the above relation and found to be as 11 × 10 3 K. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 655–661, 1997