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Copolymers of Bromine-containing Monomers 8. Copolymers of Acrylonitrile with some Brominated Phenyl Methacrylate

Zvonimir Janović ; IN A-Research Institute, Zagreb, Croatia, Yugoslavia
Karla Sarić ; IN A-Research Institute, Zagreb, Croatia, Yugoslavia
Otto Vogl ; Polytechnic Institute of New York Brooklyn, New York 11201

Sažetak

Acrylonitrile was free radical copolymerized with 2,4,6-tribromophenyl
methacrylate of pentabromophenyl methacrylate in aqueous emulsion or dimethylformamide solutions. The thermal and flammability characteristics of the resulting polymers were investigated. The reactivity ratios of the monomers and the initial rates for homopolymerization and copolymerization reactions were determined. The monomer reactivity ratios were found to depend slightly on the reaction medium and the reaction rates are in the order acrylonitrile > pentabromophenyl methacrylate > tribromophenyl methacrylate.
Thermal stability determined from TGA and DTG measurements
showed that poly(2,4,6-tribromophenyl methacrylate) and
its acrylonitrile copolymers were thermally more stable than the
poly(pentabromophenyl methacrylate) and its acrylonitrile copolymers, though the latter showed better flame-retardant properties as was demonstrated by limiting oxygen index measurements.

Ključne riječi

Hrčak ID:

177368

URI

https://hrcak.srce.hr/177368

Datum izdavanja:

20.6.1986.

Posjeta: 602 *