Emulsion polymerization of acrylic monomers in the presence of nanosilica for potential application in pressure-sensitive adhesives

Acrylic pressure-sensitive adhesives (PSAs) are defined as multi-component polymers, containing acrylic acid esters which have been coated on a high mechanically resistant strip. In this study, a definite ratio of 2-ethylhexyl acrylate/acrylic acid/methyl methacrylate (2-EHA/AA/MMA) was considered for the preparation of latexes via emulsion polymerization with applicability in PSAs. Particle size and morphological properties were studied by DLS, SEM and TEM analyses. Further investigations on the adhesion properties showed a considerable improvement in tack resistance for the nanocomposite films. 250% and 300% increase were obtained for the samples with 2 and 4 wt% of nanosilica, respectively. Also peel analysis results showed the appropriateness of the sample with 2 wt% of silica nanoparticles for this purpose

Keywords:

Nanosilica , Acrylic , Nanocomposite particles , Pressure sensitive adhesives , Adhesion