Formaldehyde Resins. LXXV. Novolak Resin from <I>p</I>-Chlorophenol and Formaldehyde

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概要

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• A novolak resin of a higher molecular weight, as described by Burke et al., was not obtained. It was considered that the reaction of <I>p</I>-chlorophenol with <I>s</I>-trioxane proceeded as follows: (1) At first, a normal reaction of novolak formation proceeded. The molecular weight distribution was explained by Imoto's theoretical equation (120°C, 4 hr.). The analytical value of C1% was rather close to the calculated value. (2) Then " reformation reaction" started (120°C, 7 hr. and 150°C, 2 hr.).(3) Reformation took place rather vigorously, and the molecular weight distribution became close to Poisson's distribution (150°C, 8 hr.). (4) A three-dimensional compound was formed, and the molecular weight of the soluble part was lowered (150°C, 11 hr.). (5) The molecular weight of the soluble part increased by the decomposition of the threedimensional compound and by the dehydrochlorination reaction (150°C, 24 hr.).

• 社団法人 日本化学会の論文

著者

• Imoto M.

  Department Of Civil Engineering The University Of Tokushima

• Nakade Shin-ichi

  Department of Applied Chemistry Faculty of Engineering Osaka City University

関連論文

• Aerodynamic Properties for Closely Spaced Triple Circular Cylinders
• Formaldehyde Resins. LXXV. Novolak Resin from p-Chlorophenol and Formaldehyde

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