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The higher mechanical stability of the sulfonated polymer is attributed to the higher rigidity of its molecules in solution. On the other hand, the ability of the high-molecular-weight polymers to form transient, flow-induced microgels boost their mechanical stability. This ability increases with the increase in the molecular weight of the polymer.
Mechanical stability of high-molecular-weight polyacrylamides and an (acrylamido tert -butyl sulfonic acid)-acrylamide copolymer used in enhanced oil recovery. Journal of Applied Polymer Science 2014, 131 (20) , n/a-n/a. DOI: 10.1002/app.40921.
