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Polymerization of unsaturated dibasic acid derivatives capable of forming micelles. A novel synthetic method for anionic oligomers with high charge densities
Author(s) -
Aoki Shuzo,
Okuno Masakazu
Publication year - 1996
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(199601)39:1<47::aid-pi447>3.0.co;2-l
Subject(s) - dibasic acid , itaconic acid , maleic acid , polymerization , monomer , polymer chemistry , chemistry , cationic polymerization , fumaric acid , hydrolysis , oligomer , radical polymerization , aqueous solution , polymer , copolymer , organic chemistry
A novel synthetic method for producing anionic oligomers with high charge densities was developed by polymerization of surface active monomers in aqueous micellar solutions. Unsaturated dibasic acids, such as itaconic, maleic and fumaric acids, having low or no homopolymerizability in water, were converted to surface active derivatives by introducing a long chain alkyl by ester or amide bonding. Their polymerizabilities were greatly improved to give poly(itaconic acid derivative)s and poly(fumaric acid derivative)s in fairly good yield. However, in the case of sodium salts of maleic acid half ester and N ‐alkylmaleamic acid, hydrolysis of the monomer as a side reaction during the polymerization occurred to a great extent, reducing the active monomer concentration, and the polymer formation was apparently saturated at a rather early stage of the process. The resulting polymers, with molecular weight in the oligomer region, were hydrolysed to the polyanious.