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Solute and penetrant diffusion in swellable polymers. XI. The dynamic swelling behavior of hydrophilic copolymers containing multiethylene glycol dimethacrylates
Author(s) -
Shieh Lisa Y.,
Peppas Nikolaos A.
Publication year - 1991
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.1991.070420611
Subject(s) - copolymer , swelling , polymer chemistry , methacrylate , penetrant (biochemical) , polymer , materials science , ethylene glycol dimethacrylate , chemical engineering , polymerization , diffusion , ethylene glycol , chemistry , organic chemistry , composite material , thermodynamics , methacrylic acid , physics , engineering
Copolymers of 2‐hydroxyethyl methacrylate with a number of multiethylene glycol dimethacrylates were prepared by bulk copolymerization in the presence of AIBN s an initiator. The content of the dimethacrylate varied between 30 and 50 mol %. Additional copolymers were prepared by solution polymerization in the presence of water or ethanol. All samples were swollen in water up to thermodynamic equilibrium, and their dynamic swelling behavior was studied as a function of time. It was concluded that the mechanism of water transport in these moderately and highly crosslinked polymers was a coupled relaxation and diffusion and that the relaxational contribution to the overall transport depended on the chain length of the multiethylene glycol dimethacrylate.