One model and two commercial ABS (acrylonitrile–butadiene–styrene) resins have been separated into three polymeric phases: polybutadiene, styrene–acrylonitrile copolymer, and styrene–acrylonitrile copolymer grafted onto polybutadiene. A third commercial ABS resin has been separated into two polymeric phases: styrene–acrylonitrile copolymer and butadiene–acrylonitrile copolymer.
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B. D. Gesner (1965) studied this question.
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