Abstract

Polymer latexes stabilized with different acrylic acid (AA) chain lengths (controlled by Reversible Addition–Fragmentation Chain Transfer) were synthesized following different routes: Starting from poly(acrylic acid) (PAA) chains as surfactant precursors or starting from poly(acrylic acid)-block-poly(butyl acrylate) (PAA-b-PBA) copolymers as surfactants. In this last case, both the activated and deactivated copolymers were used. The final water resistance and mechanical properties of the films obtained from the different latexes was studied. The effect of the PAA chain length on the water resistance depended on the way the PAA was added to the latex, as homopolymer or as block copolymer. The effect on the coalescence of the particles was not significant, but the PAA length affected the final mechanical properties of the films, lowering them for longer PAA lengths.

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