Studies of the Cross-linking and Glass Transition of Fatty Acid-Modified Alkyd Resins
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概要
- 論文の詳細を見る
a) The degree of cross-linking observed in films of fatty acid modified alkyd resins increases with the content of unsaturated acids. Moreover, cross-linking is not so effective in raising the <I>T</I><SUB>g</SUB> as the benzene ring, which has a larger cohesive energy.<BR>b) Both the <I>T</I><SUB>g</SUB> and the degree of cross-linking increase with the increase in the molecular weight of the prepolymer.<BR>c) The excess of glycerol employed in fatty acid-modified alkyd resin is effective in raising the <I>T</I><SUB>g</SUB> and encouraging the progress of the cross-linking.<BR>d) Generally, the cross-linking is not soon completed; as time elapses, the <I>T</I><SUB>g</SUB> rises, and the cross-linking progresses. No change in the <I>G</I><SUB>h</SUB> with the elevation of the <I>T</I><SUB>g</SUB> (baked film with the addition of a drier) is considered to be caused by the formation of polar groups by air-oxidation.<BR>e) In the early period of drying, a sub-glass transition caused by the unrestrained chain of the acyl groups is observed.
- 社団法人 日本化学会の論文
著者
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Chen L.
Department Of Engineering Science National Cheng Kung University
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Kumanotani Ju
Department of Applied Chemistry Faculty of Engineering The University of Tokyo
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Kumanotani J.
Department of Applied Chemistry Faculty of Engineering The University of Tokyo
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Kuwata Tsutomu
Department of Applied Chemistry Faculty of Engineering The University of Tokyo
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Chen L.
Department of Applied Chemistry Faculty of Engineering The University of Tokyo
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