STYRENE AND ACRYLONITRILE COPOLYMERIZA-TION UNDER ULTRASONIC IRRADIATION
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概要
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The bulk copolymerization of styrene and acrylonitrile with 2, 2''-azobisisobutyronitrile as the initiator, was carried out under ultrasonic irradiation. The effects of ultrasonic waves on the copolymerization rate and the average molecular weight of polymer were studied. It was found that the kinetic scheme of copolymerization was not affected by ultrasound, but that the kintic parameters were affected by ultrasonic waves except for the rate constant of acrylonitrile homopolymerization, δ''B, and reactivity ratios, rA and rB. The rate constant of styrene homopolymerization, δ''A, andØ value increased with ultrasonic irradiation, although initiator efficiency decreased slightly with ultrasonic irradiation. It is suggested from these results that ultrasonic waves increased the recombination of two free radicals.
- 公益社団法人 化学工学会の論文
著者
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Miyata Takao
Department Of Earth And Planetary Sciences Faculty Of Science Kobe University
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Nakashio Fumiyuki
Department Of Applied Chemistry Kyushu University
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