Vinyl Polymerization. CLXXII. Polymerization of Methyl Methacrylate Initiated by Nickel Peroxide
作者:
Tadashi Nakata,
Takayuki Otsu,
Masami Yamaguchi,
Minoru Imoto,
期刊:
Journal of Macromolecular Science: Part A - Chemistry
(Taylor Available online 1967)
卷期:
Volume 1,
issue 8
页码: 1447-1455
ISSN:0022-233X
年代: 1967
DOI:10.1080/10601326708053784
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
When nickel peroxide was used as an initiator of the polymerization of methyl methacrylate, it was found that the radical polymerization proceeded easier than styrene under similar conditions, and that the polymers obtained at low temperatures showed somewhat increased syndiotactic sequence as compared with ordinary radical polymers. From the NMR determinations of the polymers resulted by nickel peroxide at various temperatures, the Bovey-Tiers relationship, that is, that the probabilities of formation of isotactic, syndiotactic, and heterotactic triads of monomer unit among the polymer chain are controlled by a single parameter of the probability of isotactic addition of monomer in the propagation step was confirmed in this case. Similarly, the ratioki/ksin rate constants for isotactic and syndiotactic additions in the polymerization by nickel peroxide in bulk was expressed by the following equation:
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