Abstract
Poly(vinylamine) (2) and copolymers (3) resulting from various degrees of substitution (DS) with benzyl groups were synthesized. The viscosity of the polymers measured in Tris buffer (μ= 0.05 M) at different pH values decreases with the increase of the hydrophobic character, and 3 takes a very tight conformation for DS> 50%. A fluorescence study was carried out using potassium 2-p-toluidinylnaphthalene-6-sulfonate (TNS) as the hydrophobic probe. We showed the existence of an apolar microdomain which is at the origin of the solubilizing power of 3. The hydrolysis of p-nitrophenyl acetate (PNPA) carried out at 25°C in Tris buffer solution (pH= 8.74; μ= 0.05 M) was accelerated up to 20-fold compared to the 2 catalyzed reaction
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