scholarly journals Removal of Water from Water-in-crude Oil Emulsions with Poly[(acrylic acid)-co-(sodium acrylate)] as Water-absorptive-polymers

2018 ◽  
Vol 61 (2) ◽  
pp. 59-71
Author(s):  
Chiyu Nakano ◽  
Yuta Takada ◽  
Yutaro Chida ◽  
Sumio Kato ◽  
Masataka Ogasawara ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Crude Oil ◽  
Sodium Acrylate ◽  
Oil Emulsions ◽  
Poly Acrylic Acid

Degree of branching in poly(acrylic acid) prepared by controlled and conventional radical polymerization

2019 ◽  
Vol 10 (19) ◽  
pp. 2469-2476 ◽  
Author(s):  
Alison R. Maniego ◽  
Adam T. Sutton ◽  
Yohann Guillaneuf ◽  
Catherine Lefay ◽  
Mathias Destarac ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Radical Polymerization ◽  
Sodium Acrylate ◽  
Degree Of Branching ◽  
Poly Acrylic Acid

Poly(acrylic acid)s, PAAs and poly(sodium acrylate)s, PNaAs were characterized in detail.

Nanoscale Elastic and Tribological Properties of Poly(Acrylic Acid) Superabsorbent Gels

2008 ◽  
Vol 1085 ◽  
Author(s):  
Beatriz Talavera ◽  
Juan J. Martínez ◽  
Francisca Santiago ◽  
M. Teresa Cuberes
Keyword(s):  
Acrylic Acid ◽  
Sodium Hydroxide ◽  
Sodium Acrylate ◽  
Water Molecules ◽  
Friction Force Microscopy ◽  
Ambient Conditions ◽  
Force Microscopy ◽  
Topographic High ◽  
Poly Acrylic Acid

ABSTRACTUltrasonic Force Microscopy and Friction Force Microscopy have been applied to the characterization of the elastic and tribological responses of poly(acrylic acid) hydrogels at ambient conditions. The gels were prepared by free radical polymerization of acrylic acid monomers partially neutralized by sodium hydroxide, using N, N'-methylen-bis-acrylamide as a crosslinker. Nanoscale domains with different stiffness and friction are observed. Increasing the amount of crosslinker leads to the formation of smaller, more densely packed domains. The domains with higher stiffness also exhibit higher friction and lower topographic high. The results can be understood by assuming that (i) neutralization by sodium hydroxide leads to the formation of both acrylic acid and sodium acrylate polymeric strands (ii) the observed domains differ in their acrylic acid / sodium acrylate content. In the acrylic acid rich domains, hydrogen bonding among the polymeric strands explains a higher stiffness and lower topography. In the sodium acrylate rich domains, lubrication by water molecules linked by solvation to the sodium counterions accounts for a lower friction.

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