Abstracts Book - IMRC 2018

• SB1-O010
PERFORMANCE STUDY OF NOVEL CATIONIC TERPOLYMERS
SUBMITTED TO ELEVATED TEMPERATURES AND A HIGHLY
CONCENTRATED BRINE.
Natalya Victorovna Likhanova 1 , Diego Guzmán Lucero 2 , Felipe de Jesus Guevara Rodríguez 1 ,
Jorge F. Palomeque Santiago 3 , Javier Guzman Pantoja 4
1
Instituto Mexicano del Petróleo, Gerencia de Desarrollo de Materiales y Productos Químicos,
Mexico. 2 Instituto Mexicano del Petróleo, Gerencia de Transformación de Biomasa,, Mexico.
3 Instituto Mexicano del Petróleo, Gerencia de Productos Quimicos, Mexico. 4 Instituto Mexicano
del Petróleo, Gerencia de Refinación de hidrocarburos, Mexico.
The introduction of fragments of ionic groups into polyacrylamides forms ionicwater-soluble
polymers, and depending on what type of functional groups are
present in these polymers, these could have a positive or negative charge
degree. The hydrodynamic volume and viscosity of anionic polyacrylamides
depend on the molecular weight of these compounds, and the electrostatic
repulsion between polymer coils, but in the presence of brine, the shielding
effect of the charges leads to a reduction in electrostatic repulsion and thus to
a less significant expansion of the anionic polymer coils in the solution and
consequently to viscosity reduction. The presence of divalent ions in brine
produces the formation of salts with low solubility and intra-molecular
associations that are independent of the molecular weight of the anionic
polymer. In the present work, derivatives of polyacrylamides with
vinylpirrolidone and two ionic liquid fragments 1-vinyl-3-alkylimidazolium (AM-
VP-VIm) and 4-vinylbencyl-trimethylammonium chloride (AM-VP-VBtMA), were
studied by focusing on the solubility and resistance to a high salt concentration
(250000 ppm) brine at 160 °C. The chemical structures and thermal properties
were conï¬Â•rmed by spectroscopic techniques and thermogravimetric
analysis, respectively. The solubility of polymers in brine was analyzed through
a new methodology based on the gyration radius of polymers computed the
molecular dynamics simulation, and these theoretical results were correlated
and supported by experimental evidences. According to the aforesaid, AM-VP-
VBtMA showed better resistance in the aggressive evaluation media in
comparison with AM-VP-VIm and the commercial polymer of the SAV series; due
to the presence of an aromatic ring, a methylene bridge and the bulky
trimethylammonium group, the space volume of this polymeric ion alone is
larger with respect to imidazolium derivatives, which allows the formation of
bigger positive charge sites on the polymer and distribution of the positive