メタクリル酸メチル (MMA) -アクリルアミド (AM) 共重合体 (MMA/AM=0.95/0.05モル比) の収着過程を流動電位から求まるζポテンシャルの経時的減少過程から追求した。
速度定数のアレニウスプロットから得た収着の活性化エネルギーは,
ΔE₁^z=-5.62 kcal/mol (T<T_g)
ΔE₂^z=7.19 kcal/mol (T>T_g) である。ここにT_gは共重合体のガラス転移点 (507℃) である。
他方, 収着実験から直接得た拡散定数のアレニウスプロットから, ΔE₂^s (T>T_g) は1.88kcal/molであった。また収着量は通常の疎水性高分子の10倍ほどあった。
これらの結果をMMA-N-ヒドロキシメチルアクリルアミード (MAM) 共重合体 (MMA/MAM=0.95/005モル比) の収着から得た結果と比較し, MMA共重合体におけるNH₂基やNHCH₂OH基の収着への効果を議論した。

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This paper deals with the influence of solvent composition upon viscoelastic properties of paint films.
The samples of various solvent-diluent ratio in the solvent composition were prepared for typical nitro-cellulose lacquer, typical acrylic lacquer, acid catalyzed melamine alkyd resin paint, alkyd resin paint, polyamide resin cured epoxy resin paint and melamine alkyd resin paint. Viscoelastic properties of the films were determined by the measurements of stress-strain relation and dynamical viscoelasticity. Meanwhile, degree of swelling of the films was measured and also the retained solvent in the films were measured by gas chromatography. Experimental results are summarized as follows.
(1) It was generally found for air drying type paint that when the concentration of diluent increased, values for dynamical modulus E and stress σ decreased and breaking elongation ε showed maximun value. Influence of the solvent composition was not found for nitrocellulose lacquer due to the rigidity of the nitrocellulose molecule.
(2) Although acid catalyzed melamine-alkyd resin paint gave apparently the similar results as (1), the mechanism is not the same. The main reason is in the difference of the cross-link density of the films.
(3) As a rule, viscoelastic properties of baking type paint were not affected with the solvent composition.
(4) The results described above were considered from the viewpoint on the state of vehicle polymer in the solution.

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