This paper is aimed at working out the part played by particle/particle interfaces in the viscoelastic behaviour of latex films. More precisely, a thorough analysis of the effect of neutral or ionized carboxyl functional groups, chemically incorporated in the latex particles and at the surface of the particles, is provided. The tensile micromechanical properties of styrene-butadiene copolymer latex films, with various carboxyl group contents and various neutralizing agents, are studied using dynamic mechanical analysis. Then, the structure of the latex films is investigated, using transmission electron microscopy (TEM) performed on stained ultramicrotomed films. The features of the interfacial crosslinking which result from ionic or hydrogen bonding interactions at the particle/particle interfaces are shown up, in close correlation with structural information gained from TEM investigations. The opportunity offered by the combination of the techniques used in this work, for a comprehensive prediction of the cohesive strength of the latex films is emphasized.
Посилання на статтю:
Dynamic micromechanical investigations into particle/particle interfaces in latex films / J. Richard* and J. Maquet // Polymer. – 1992. – Vol 33. – P. 4164-4173.