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Iodine‐initiated, solid‐state copolymerization of tetraoxane with 1,3‐dioxolane in the presence of methylal. VI. Studies on copolymer composition
Author(s) -
Morita Yousuke,
Ishigaki Isao,
Kumakura Minoru,
Watanabe Yuhei,
Ito Akihiko
Publication year - 1979
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1979.070231123
Subject(s) - dioxolane , copolymer , polymer chemistry , differential scanning calorimetry , materials science , chemistry , organic chemistry , polymer , physics , thermodynamics
In order to elucidate the mechanism of copolymerization of tetraoxane‐1,3‐dioxolane, the consumption rate of 1,3‐dioxolane was measured by using gas chromatography, and the copolymer composition was determined by high‐resolution NMR spectroscopy and differential scanning calorimetry. It was found that 1,3‐dioxolane is rapidly consumed in the early stage of copolymerization if 1,3‐dioxolane is added at once. The copolymer thus obtained is characterized by a heterogeneous distribution of 1,3‐dioxolane in the copolymer chain. However, if 1,3‐dioxolane is added continuously during the progress of the copolymerization, the distribution and content of 1,3‐dioxolane in the copolymer chain was found to be very homogeneous.