Synthesis and characterization of copolymers with 1,3-oxazolic pendant groups

Vega, Isabel; Sánchez, Leonardo; D’Accorso, Norma B.

doi:10.1016/j.reactfunctpolym.2007.09.003

Cited by 14 publications

(11 citation statements)

References 17 publications

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“…This increase suggests that the higher the number of bulky heterocyclic pendant groups on the polymer backbone, the larger the separation between chains, thus allowing a more effective reactant attack. We observed a similar situation in the modification of PAM 9…”

Section: Resultssupporting

confidence: 78%

“…Conversely, the polymers containing heterocyclic moieties have a great interest due to their intriguing topologic architecture and vast application in many fields 7. Previously, we have described the synthesis of copolymers with heterocyclic pendant groups, by chemical modification, for its use as a gravel‐pack carrier fluid,8 completion fluid or fracturing fluid 9, 10. The properties of these new materials are significantly different from their precursors.…”

Section: Introductionmentioning

confidence: 99%

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New copolymers with heterocyclic pendant groups obtained from PVC using microwave‐assisted process

Lamanna

D’Accorso

2011

J of Applied Polymer Sci

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ABSTRACT:We report the synthesis of new copolymers from poly(vinyl chloride) (PVC) with 1,2,4-triazol-5-yl-sulfanyl pendant groups (PVCT) by nucleophilic substitution using microwave energetic sources. By comparing the synthesis of PVCT between microwave and thermal conditions, it was found that the use of microwave-assisted process led to higher conversion levels than that of the thermal synthesis. Moreover, significant decrease in reaction times was obtained for the microwave assisted synthesis, which avoided secondary reactions. Conversion yields were calculated from elemental analysis and the molecular weighs were analyzed by means of SEC. The molecular structures of the new copolymers were confirmed by FTIR,

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Section: Resultssupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

New copolymers with heterocyclic pendant groups obtained from PVC using microwave‐assisted process

Lamanna

D’Accorso

2011

J of Applied Polymer Sci

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“…Furthermore, the strong adsorption between positive quaternary or weak tertiary cationic groups and the sand surfaces will strongly decrease the polymer concentration when it propagates in the porous media. Copolymerizing of AM with functional monomers such as vinylpyrrolidone, 1,3-oxazolic, and N -phenylmaleimide is an alternative strategy to enhance the salt tolerance. However, the low polymerization activity of theses monomers makes it difficult to achieve high molecular weight and the molar ratio of functional monomers is within the range of 10%–30%, which implies that much higher cost is needed to produce this type of polymer .…”

Section: Introductionmentioning

confidence: 99%

Comparative Studies on Enhanced Oil Recovery: Thermoviscosifying Polymer Versus Polyacrylamide

Yin

et al. 2017

Energy Fuels

116

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High-molecular-weight polyacrylamide (PAM) has been widely used in chemically enhanced oil recovery (EOR) processes under mild conditions, but its poor tolerance to high temperature and high salinity impeded the use in severe oil reservoirs. To overcome the inadequacies of PAM, thermoviscosifying polymers (TVPs) whose viscosity increases upon increasing temperature and salinity were developed in recent years. In this work, comparative studies with PAM and TVP, having more similar molecular weights, were performed with regard to their rheological behaviors, thermal stability, and core flooding feasibility. It was found that the TVP aqueous solution exhibited thermothickening ability, even at a polymer concentration of 0.2 wt % with a total dissolved solids ratio (TDS) of 101 000 mg L–1 upon increasing temperature, while PAM only showed a monotonic decrease in viscosity under identical conditions. Remaining viscosity of TVP was higher than that of PAM after aging at 45 or 85 °C for one month. Core flooding tests demonstrated both polymers show good transportation in porous media, and a higher oil recovery of 16.4% and 15.5% can be attained by TVP at 45 and 85 °C, respectively, while those of PAM are only 12.0% and 9.20%.

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“…For example, PAM copolymers containing 1,3-oxazolic pendant groups were obtained using the amide-5-phenyl-1,3-oxazole, which showed high viscosity values after 2 h of conversion. Since the gel is relatively weak, the bonds between the copolymer chains are reversible with the applied shear [150].…”

Section: Phmentioning

confidence: 99%

Water Control with Gels Based on Synthetic Polymers under Extreme Conditions in Oil Wells

et al. 2022

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A bibliographic review of research works dealing with gels based on synthetic polymers and their application in water control under harsh conditions was compiled. The extreme conditions were defined to be above 100 °C with 100 000 ppm of total dissolved solids, including divalent ions. Works describing laboratory experiments and oilfield implementations were also considered. According to current literature, some gels based on synthetic polymers have displayed desirable properties for water control, but in many cases, research is still at laboratory level. Therefore, further studies are required to understand the mode of action and stability of gels and polymers submitted to hard conditions in order to produce high‐performance prototypes.

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Synthesis and characterization of copolymers with 1,3-oxazolic pendant groups

Cited by 14 publications

References 17 publications

New copolymers with heterocyclic pendant groups obtained from PVC using microwave‐assisted process

New copolymers with heterocyclic pendant groups obtained from PVC using microwave‐assisted process

Comparative Studies on Enhanced Oil Recovery: Thermoviscosifying Polymer Versus Polyacrylamide

Water Control with Gels Based on Synthetic Polymers under Extreme Conditions in Oil Wells

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