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Real time monitoring of latex film dissolution by UVV technique
Author(s) -
Pekcan Önder,
Arda Ertan
Publication year - 2000
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(20000222)75:8<1075::aid-app12>3.0.co;2-x
Subject(s) - methyl methacrylate , solvent , desorption , polymer , dissolution , absorbance , materials science , polymer chemistry , annealing (glass) , diffusion , analytical chemistry (journal) , chemical engineering , copolymer , chemistry , chromatography , organic chemistry , adsorption , composite material , thermodynamics , physics , engineering
Abstract UV–visible (UVV) technique is used for monitoring of polymer film dissolution. These films are formed from pyrene (P)‐labeled poly(methyl methacrylate) (PMMA) latex particles, sterically stabilized by poly isobutylene (PIB, Annealing of films was performed above T g at various temperatures for 30‐min time intervals. Diffusion of solvent molecules (chloroform) into the annealed latex film was followed by desorption of PMMA chains. Desorption of P‐labeled PMMA chains was monitored in real time by the absorbance change of P in the polymer–solvent mixture. A diffusion model with a moving boundary was used to quantify real time UVV data. Diffusion coefficients of desorbed PMMA chains were measured and found to be between 2 and 0.6 × 10 −11 cm 2 s −1 in the 100 and 275°C temperature range. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 75: 1075–1082, 2000