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Table 2

Summary of activities performed with acrylamide-based polymers and organic crosslinkers.

Year Activity Authors
1984 Formation of the first gels by organic crosslinking – PAM/resorcinol-formaldehyde and PAM/phenol-formaldehyde Chang et al.
1993 Developed phenol-formaldehyde crosslinked systems Moradi-Araghi
1996 Produced and reported the application of PAM gels crosslinked with HQ–HMTA for use in high-temperature reservoirs Hutchins et al.
1997 Observed a long gelation time and thermal stability of PAM/HQ–HMTA systems Dovan et al.
1997 Developed phenol-formaldehyde systems Bryant et al.
1998 and 1999 Produced the first stable crosslinked by PEI Hardy et al.
2000 Developed phenol-formaldehyde crosslinked systems Moradi-Araghi
2007 Investigated the viscoelastic properties of gels formed by PAM–tBA and PEI Al-Muntasheri et al.
2008b Studied gelling kinetics of PAM/PEI systems under HTHP conditions Al-Muntasheri et al.
2009 Developed a comparative study between PAM/PEI and PAM–tBA/PEI Al-Muntasheri et al.
2010 Investigated the influence of polymer concentration and molecular weight on PHPA/PEI hydrogels Jia et al.
2011 Evaluated the performance of PHPA/PEI systems Zhao et al.
2012 Conducted studies of the properties of PAM/HQ–HMTA hydrogels Sengupta et al.
2012 Concluded that several factors influence the gelling performance of PHPA/PEI systems Jia et al.
2012 Developed a delayed gel system consisting of PHPA, PEI, and dextran sulfate Jayakumar and Lane
2013a, b Studied the gelling kinetics of gels formed by PHPA/HQ–HMTA Yadav and Matho
2013 Developed gel systems with PHPA, PEI and AMPS Jayakumar and Lane
2014 Investigated the influence of several factors on PAM/HQ–HMTA systems Sengupta et al.
2014b, c Evaluated the action of NaCl and NH4Cl in PAM/PEI systems El-Karsani et al.
2015b Prepared systems with hydrophobically associated polyacrylamide and PEI Bai et al.
2016 Investigated the influence of several factors on PAM/HQ–HMTA systems Liu et al.
2016 Studied systems formed by PHPA and PEI Hashmat et al.
2017 Developed PHPA/HQ–HMTA gel systems with resistance to HTHS conditions Fang et al.
2017 Produced gel systems formed by a terpolymer of AM, AA and AMC16S, crosslinked by PEI Zhang et al.
2017 Developed systems composed of PHPA, PEI and silica nanoparticles Ma et al.
2018 Developed PAM–PEI systems reinforced with nanosilica Chen et al.
2018 Studied the action of nanosilica as a reinforcement filler in PAM/resorcinol-HMTA systems Lashari et al.
2018 Developed gel systems with multiple crosslinking, formed by PHPA, Cr(III) acetate and PEI Jia and Chen
2018 Developed PHPA/PEI systems reinforced with coal fly ash Adewunmi et al.
2019 Studied the effects of several factors on the gelation performance of hydrogels formed by terpolymer (AM–AMPS–NVP) and PEI Zhu et al.
2019 Evaluated systems formed by acrylamide-based polymers, PEI, and bentonite Tessarolli et al.

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