液状1,2ポリブタジエンの酸化硬化塗膜に関する研究

概要

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Mecharical properties and some other physical properties of the oxidative cured films from liquid 1, 2-polybutadiene (1. 2-PB) which prepared by anionic living polymerigation were studied. The effect of molecular weights, catalysts and baking temperatures are discussed. Furthermore performance of the films from the 1, 2-PB were compared with that of such similar resins as a commercial sodium catalyzed liquid polybutadiene, baking type acryl, and melamine alkyd. Results obtained are as follows : <BR>1) As catalyst, Zn and PB gave the films of higher tensile strength, elongation and better hardness, bending resistance and impact resistance than that from Co and Mn. As to the viscoelastic properties, the Co catalyzed film give higher Tg (165°C) than that from Zn (Tg=75°C) <BR>2) In accordance with the higher baking temperature, the tensile strength increases and elongation decreases. As molecular weight of 1, 2-PB increased, tensile of the films increased proportionally, but dependance to the baking temperature decreased.<BR>3) The films from 1, 2-PB showed good phyoical properties as coating as well as melamine-alky baking aeryl, but the films form commercial sodium catalyzed liquid polybutadiene shoued inforion results.<BR>4) Oxidative curing reaction of 1, 2-PB was followed with IR spectrum. From the change of unsaturation, hydroxyl and carbonyl contents, differences, in mechanism of the metals as catalyst were descussed.
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