rheological screening of low-molecular-weight polyacrylamide

rheological screening of low-molecular-weight polyacrylamide
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  • Does hydrolysis of polyacrylamide occur during gelation?
  • The effects of HD and initial pH revealed particular effects that indicate that the kinetics of hydrolysis of polyacrylamide during gelation is to be considered in the gelation mechanism and constitutes a working prospect. Al-Muntasheri GA (2012) Conformance control with polymer gels: what it takes to be successful.
  • Can acrylamide based polymers cross-link?
  • Most importantly, it can cross-link with different acrylamide-based polymers, covering a wide temperature application range from 4.4 [ 16] to 205 °C [ 17 ]. The first gel system based on cross-linking using PEI (PAtBA/PEI) was introduced by Morgan et al. [ 18] for water/gas shutoff treatments.
  • How do NH2 groups affect cross-linking in polyacrylamide chains?
  • In a general scheme where PEI macromolecules are dispersed in an entanglement of polyacrylamide chains, the cross-linking appears to be governed by the number of macromolecules (concentration) and the number of NH 2 groups that are present. In our case, the two PEIs had the same BD (BD = 57–59), but with a molecular weight ratio of 34.