Cross-Linking and Catalytic Effects of Ca exp 2+ Ions Released from Cement on the Properties of Unsaturated Polyester and Resorcinol Phenol-Formaldehyde Polymer Concrete

摘要

The Ca exp 2+ bivalent metallic ions released from the portland cement grains in a polymer concrete (PC) formulation consisting of unsaturated polyester (UP) monomer, water, cement, and aggregate contribute to the prevention of the scission of polymer chains caused by the hydrolysis of the carboxylic ester groups existing in the main chains of UP monomer. This is due to the formation of ionic bonds between the Ca exp 2+ ions and the carboxylic anions (-COO exp - ) formed by the hydrolytic reaction of esters. Ca exp 2+ ions also have an active catalytic effect on the polymerization rates of PC containing resorcinol phenol-formaldehyde (RPF) as a binder material. (ERA citation 06:009430)