Core-Shell Morphology of Redispersible Powders in Polymer-Cement Waterproof Mortars.

ABSTRACT: Redispersible powders based on soft core-hard shell polymer particles can be used as additives in polymer-cement mortars. The role of this morphology on the spray-drying production of these powders and on the crack-bridging properties of the corresponding cement-based membranes is investigated. Different polymer latexes at high solid content with varied core-shell ratio, shell thickness and chemical composition (hardness) were prepared from styrene and 2-ethylhexyl acrylate monomers via semi-batch emulsion polymerization. The latexes were characterized in terms of size, composition, and glass transition temperature (T g ), and spray-dried to obtain redispersible polymer powders (RPPs) using poly (vinyl alcohol) and limestone powder as anti-caking agents. The polymer powders were mixed with

SUBMITTER: Caimi S 

PROVIDER: S-EPMC6403678 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature