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Synthesis and characterization of mica—vinyl graft copolymers
Author(s) -
Rao K. Panduranga,
Kanniappan E. P.,
Jayaraman K. S.,
Joseph K. Thomas,
Nayudamma Y.
Publication year - 1981
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.1981.070261015
Subject(s) - copolymer , grafting , acrylonitrile , mica , polymer chemistry , methyl methacrylate , saponification , materials science , aqueous solution , chemistry , organic chemistry , polymer , composite material
Graft copolymerization of methyl methacrylate (MMA) and acrylonitrile (AN) onto mica was carried out by the ceric ion method. Experiments were carried out both in the presence and absence of oxygen; oxygen has some detrimental effect in the grafting of AN onto mica. Mica—vinyl graft copolymers were characterized using infrared spectra after purifying the crude graft copolymers for the removal of the occluded homopolymers. The percent grafting, grafting efficiency and the ratio of R g / R h were determined. Mica—graft copolymers were saponified by treating with aqueous alkali to convert the nitrile groups to carboxyl groups with a view to utilize these groups for coupling to collagen substrates. Since in a chrome‐tanned leather there are available coordination sites due to fixed chromium, the mica—graft copolymer could get bound, thereby resulting in a well filled‐up leather.