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New catalytic systems based on intercalated polymer‐montmorillonite supports
Author(s) -
Akelah Ahmed,
ElBorai Mohamed A.,
Abd ElAal Mohmoud F.,
Rehab Ahmed,
AbouZeid Mostafa S.
Publication year - 1999
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(19990501)200:5<955::aid-macp955>3.0.co;2-d
Subject(s) - chemistry , polymer chemistry , acrylonitrile , cyanate , catalysis , sulfonium , montmorillonite , divinylbenzene , thiocyanate , polymerization , phase transfer catalyst , onium , alkyl , polymer , salt (chemistry) , organic chemistry , styrene , copolymer , ion
A composite material was prepared by ion exchange between the ammonium salt of the α , ω ‐diamine‐terminated oligo(butadiene‐ co ‐acrylonitrile) (ATBN) and the interlamellar cation of the montmorillonite (Na‐MMT). Grafted free radical polymerization of both oligo(oxyethylene)methacrylate and chloromethylstyrene supported onto the above composite was prepared. The chloromethyl groups were modified to produce onium salts which are suitable as phase transfer catalysts. The catalytic activities were investigated in nucleophilic reactions of thiocyanate, cyanate and nitrite with alkyl or aryl halides. The effects of the nature and structure of the support, amount of catalyst, solvent, and the temperature on the rate of reactions were studied.