Novel Cross-Linking Mechanism with Diol Type Cross-Linkers, to Prepare PAA Microgels via Precipitation Polymerization Method.

This article describes a new cross-linking mechanism for synthesizing PAA microgels by precipitation polymerization method. The post curing stage was defined, for the first time, in this study. Effect of cross-linker concentration, and the time and temperature of post curing stage on the samples properties was investigated. A new relationship between gelation rate in the post curing stage and hydroxyl content was defined. Also a new relationship betweenMc, hydroxyl concentration and temperature of post curing stage was suggested too. According to rheological characterization, microgels synthesized by novel mechanism have better rheological properties than microgels synthesized by conventional mechanism. [ABSTRACT FROM PUBLISHER]