Swelling factors affecting, ASTs

The thickening mechanisms of linear carboxyl-containing emulsion polymers have been studied in considerable detail. The polymer molecules of AST emulsions are initially in a coiled configuration within individual latex particles of submicrometer size, and the viscosity of the diluted latex emulsion is similar to that of water prior to neutralization. On the addition of base, the carboxyl groups are ionized, and hydrophilic polymer is formed within the particles. Depending on various factors, which will be elaborated on later in this chapter under the section entitled Factors Affecting the Swelling Dissolution Behavior of Conventional ASTs , the particles may only swell or dissolve completely, or the surface polymer may dissolve and leave swollen cores. 

Factors Affecting the Swelling Dissolution Behavior of Conventional ASTs... 

List 1. Factors Known To Affect the Thickening, Swelling, or Dissolution Behavior of Conventional AST Emulsion Polymers (ASE Thickeners) ... 

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