No abstract

No abstract

No abstract

No abstract

CeO 2 nanoparticles have been successfully incorporated into acrylic latex particles with an excellent homogeneous distribution (mostly one inorganic particle per polymer particle) and limited aggregation (inorganic nanoparticles predominantly in the 17-26 nm range, when the original cerium oxide dispersion had a volume average diameter of 8 nm). The hydrophobicity and wettability of the inorganic nanoparticles with the monomer mixture and the process used, semibatch emulsion polymerization on a seed produced by miniemulsion polymerization containing the whole load of the metal oxide, were the key aspects to achieve this morphology for the first time at industrially relevant solids content (40 wt%). Furthermore, the transparency and the substantially enhanced UV-Vis absorbance capacity make those hybrid acrylic/CeO 2 dispersions excellent candidates for a large number of applications including clear coatings and cosmetics.

No abstract

No abstract

A cationic macromonomer, 2-methacryloylethylhexadecyldimethylammonium bromide MA16, and a cationic macroinitiator, cationic acrylic/styrene oligomer end-capped with a nitroxide, were used to modify pristine Na−MMT, to enhance compatibility between the clay platelets and the host acrylic polymer matrix in waterborne nanocomposites. Both cationic species were successfully exchanged in the montmorillonite. The organically modified clays were used for the synthesis of acrylic (MMA/BA)/clay waterborne nanocomposites by miniemulsion polymerization. The 30% solids containing latexes were stable and coagulum free and presented better mechanical, thermal and barrier properties than the pristine acrylic copolymer.