応力塗料膜におけるSolvent-Crackingの発生機構について

概要

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When the coating using calcium rosin as a basic ingredient comes in contact with solvents, it shows "solvent-cracking" which is peculiar to high polymers, and thus the cracking of coating occurs at lower stress than in air. Therefore, strain sensitivity of brittle coating has been improved by applying solvent-cracking, and the experimental strain analysis has become very easy. A few theories such as spherulitic aggregate and others, has been introduced in high polymers as mechanism of solvent-cracking. Since the molecular structure of brittle coating is different from high polymers, it is doubtful whether the mechanism may be applied to brittle coating even if the above theory has been established. Through the structural model which was observed in the previous report, the author has assumed and investigated systematically a few mechanism for the cracking. From the result, the mechanism of solvent-cracking on brittle coating is concluded as follows ; when the coating comes in contact with solvents, its components, rosin aced and pure calcium salt, show such a different degree of swelling that tensile stress occurs transitionally in brittle coating.
社団法人日本材料学会の論文
1962-02-15