The role of pH, ionic strength and monomer concentration on the terpolymerization of 2-acrylamido-2-methylpropane sulfonic acid, acrylamide and acrylic acid

POLYMER

卷:177

Article

Scott, Alison J.¹  Duever, Thomas A.²  Penlidis, Alexander¹ 

[1] Univ Waterloo, Inst Polymer Res, Dept Chem Engn, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada

[2] Ryerson Univ, Dept Chem Engn, 350 Victoria St, Toronto, ON M5B 2K3, Canada

关键词: Effects on reactivity ratios;    Terpolymerization kinetics;    Water-soluble polymers;   

DOI  :  10.1016/j.polymer.2019.06.006

来源: Elsevier

【 摘 要 】

The current study examines the effects of important factors (namely, pH, ionic strength and monomer concentration) on the terpolymerization of 2-acrylamido-2-methylpropane sulfonic acid (AMPS), acrylamide (AAm) and acrylic acid (AAc). A good understanding of how these factor levels affect terpolymerization reactivity ratios, and terpolymer composition, microstructure and molecular weight paves the way for the synthesis of custom-made polymers for specific applications. For the range of conditions studied, ionic strength has the greatest influence on reactivity ratios; results indicate that cross-over behavior exists for AMPS-based reactivity ratios. No clear correlation is observed between pH and reactivity ratio estimates (for 5 <= pH <= 9), but parameter estimation results suggest that the incorporation of acidic comonomers (AMPS and AAc) is affected by pH within this range. Finally, monomer concentration has a dominant impact on molecular weight averages, even when other factors are varied.

【 授权许可】

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