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Iodine-initiated, solid-state copolymerization of tetraoxane with 1,3-dioxolane in the presence of methylal. I. Fundamental study on beaker-scale copolymerization

✍ Scribed by Isao Ishigaki; Yuhei Watanabe; Yosuke Morita; Kiyoshi Takada; Akihiko Ito

Publisher: John Wiley and Sons
Year: 1977
Tongue: English
Weight: 704 KB
Volume: 21
Category: Article
ISSN: 0021-8995
DOI: 10.1002/app.1977.070210312

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✦ Synopsis

Abstract

The iodine‐initiated, solid‐state copolymerization of tetraoxane with 1,3‐dioxolane in the presence of methylal has been studied on a beaker scale. It was found that tetraoxane can be easily copolymerized with 1,3‐dioxolane by a small amount of iodine as initiator and gives oxymethylene copolymer with excellent thermal stability in a high yield. The copolymerization was largely influenced by the concentrations of iodine, 1,3‐dioxolane, and methylal, i.e., the polymerization rate increased with increase not only in iodine but also in 1,3‐dioxolane, and the thermal stability and the molecular weight of the copolymer were mainly affected by 1,3‐dioxolane and methylal concentration, respectively.

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The iodine-initiated, solid-state copolymerization of the tetraoxane-1,3-dioxolane-methylal system has been studied by measuring the molecular weight distribution of the copolymer. The molecular weight distribution of the copolymer is found to be strongly dependent on the addition method of the 1,3-