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Poly(methyl methacrylate) membranes
Author(s) -
Sakai Yoshitada,
Tanzawa Hiroshi
Publication year - 1978
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.1978.070220706
Subject(s) - tacticity , membrane , methyl methacrylate , materials science , polymer , polymer chemistry , permeability (electromagnetism) , methacrylate , poly(methyl methacrylate) , chemical engineering , capillary action , composite material , copolymer , chemistry , polymerization , biochemistry , engineering
Uniform and symmetric membranes were formed from poly(methyl methacrylate) (PMMA) by making use of the stereocomplex phenomenon which characteristically occurs in the solution of a mixture of isotactic PMMA and syndiotactic PMMA. The water permeability of the membrane was very high compared to a commercially available cellulosic membrane, whereas their NaCl permeabilities were the same. The permeabilities of the membranes are explained by a simple capillary model. By varying the tacticity of the polymer it was found that the finest membrane structure is formed at the isotactic polymer ratio of ca. 30%. This shows the close relationship between complex formation and membrane permeability.