Grafting mechanism of poly(acrylic acid) from silica particles during the gelation process

Ryu, Jungju; Lee, Hoik; Seol, Daun; Nguyễn, Ngọc Quang; Chung, Hoeil; Sohn, Daewon

doi:10.1016/j.polymer.2021.124270

Cited by 5 publications

(3 citation statements)

References 52 publications

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“…By deconvolution and fitting of the peaks for Si 2p, it was observed that there were three compositional peaks in SiEPDM, as shown in Figure 2C. The peak at ≈102.5 eV is from Si─O─C, and the one at ≈100.7 eV comes from Si─C, [ 35–37 ] and the short peak at ≈101.5 eV could have come from Si─O─Si. [ 38,39 ] These observations correlated well with the FTIR results.…”

Section: Resultsmentioning

confidence: 99%

Sulfur Free Crosslinking of EPDM Composites via Silane Grafting and Silica Incorporation

Chen,

Vahidifar,

et al. 2023

Macromol. Rapid Commun.

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This study aims at evaluating and developing an environmental‐friendly and sulfur‐free cured ethylene propylene diene monomer (EPDM) composites. Silane grafted EPDM (SiEPDM) composites incorporated with silica is prepared via a solvent‐free, one‐step reactive mixing process. The silane grafting and silica filler bonding are characterized using Fourier transform infrared spectroscopy and X‐ray photoelectron spectroscopy. The mechanical properties of the developed composites are examined. The fracture morphology is observed using an environmental scanning electron microscopy. The rheology and thermomechanical properties are evaluated by using a rotational rheometer and dynamic mechanical analyzer. Notably, a robust bonding between silica and the grafted silane is established, yielding a crosslinking network within the composite structure. This phenomenon is substantiated by the observed gel efficiency and rheology behavior. Consequently, a pronounced augmentation of up to 75% in tensile strength and 29% in tear strength are observed in the optimized SiEPDM‐silica composites, distinguishing them from their EPDM‐silica counterparts. The introduction of paraffin oil contributes to enhanced processability; however, it is concomitant with a reduction in gel efficiency and associated mechanical properties. Furthermore, subsequent UV weathering test unveils that the SiEPDM‐silica composites exhibit the highest levels of residual tensile strength and modulus, indicative of their exceptional UV stability.

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Section: Resultsmentioning

confidence: 99%

Sulfur Free Crosslinking of EPDM Composites via Silane Grafting and Silica Incorporation

Chen,

Vahidifar,

et al. 2023

Macromol. Rapid Commun.

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“…Therefore, the gelling agent with excellent performance is added to the acid to improve the viscosity of the acid, effectively limit the convection inside the fluid, and limit the transmission of H + to diffusion. At the same time, the added polymer gelling agent forms a colloidal network structure in the acid, which also prevents the activity of H + , thus effectively delaying the reaction rate of acid and rock. − At present, gelling agents mainly include synthetic polymers and natural polymers. − It is noteworthy that natural polymers have the advantages of low cost and wide sources, but their temperature resistance is poor. − Synthetic polymers can be designed according to the needs of the formation, and finally suitable gelling agent products can be obtained . At the same time, research shows that the synthetic polymer gelling acid has the characteristics of small filtration, low friction, and certain suspension and is easy to inject at a high speed, which is helpful to remove insoluble particles after reaction. − However, the synthetic gelling agents suitable for high-temperature conditions are still few (i.e., temperature resistance ≥180 °C).…”

Section: Introductionmentioning

confidence: 99%

“… 12 − 14 Synthetic polymers can be designed according to the needs of the formation, and finally suitable gelling agent products can be obtained. 15 At the same time, research shows that the synthetic polymer gelling acid has the characteristics of small filtration, low friction, and certain suspension and is easy to inject at a high speed, which is helpful to remove insoluble particles after reaction. 16 − 18 However, the synthetic gelling agents suitable for high-temperature conditions are still few (i.e., temperature resistance ≥180 °C).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of a Resin/Acrylamide-2-acrylamide-2-methylpropane Sulfonate-Diallyl Dimethyl Ammonium Chloride-N-vinyl-2-pyrrolidinone Polymer Microcapsule Gelling Agent for Oil and Gas Field Transformation

Liu,

Zhou,

Tang

et al. 2023

ACS Omega

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Deep carbonate rock oil and gas reservoir is an important support for increasing oil and gas storage and production at present. The environment of ultradeep and ultrahigh-temperature reservoirs has put forward higher technical requirements for reservoir modification acid technology. Moreover, gelling acid is the main acid solution for high-temperature reservoir acidizing transformation, with a temperature resistance of no more than 180 °C, and the gelling agent is one of the key factors restricting its high-temperature resistance performance. In this paper, AM, AMPS, DMDAAC, and NVP were used as monomers, oxidants, and reducing agents to prepare a high-temperature-resistant polymer gel through polymerization. At the same time, microcapsules were prepared by in situ polymerization using epoxy resin as the wall material. The indoor performance evaluation results indicate that the gelling agent is easily soluble in high-concentration acid solution and has good viscosity increasing effect. At 180 °C and 170 s –1 shear rate, 0.8% mass fraction of the gelling agent was dissolved in 20% mass fraction of hydrochloric acid. After shearing for 60 min, the viscosity remained at about 22.45 mPa·s, demonstrating good temperature resistance and shear resistance, and its performance was superior to existing commonly used gelling agent products.

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Smart hybrid copolymer-coated silica nanosystems with dual responsiveness as a carrier for positive charged molecules

Améndola,

Velasco,

Acosta

et al. 2024

European Polymer Journal

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Grafting mechanism of poly(acrylic acid) from silica particles during the gelation process

Cited by 5 publications

References 52 publications

Sulfur Free Crosslinking of EPDM Composites via Silane Grafting and Silica Incorporation

Sulfur Free Crosslinking of EPDM Composites via Silane Grafting and Silica Incorporation

Synthesis and Characterization of a Resin/Acrylamide-2-acrylamide-2-methylpropane Sulfonate-Diallyl Dimethyl Ammonium Chloride-N-vinyl-2-pyrrolidinone Polymer Microcapsule Gelling Agent for Oil and Gas Field Transformation

Smart hybrid copolymer-coated silica nanosystems with dual responsiveness as a carrier for positive charged molecules

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