The molecular structure control of butyl methacrylate/acrylamide (co)polymers

Ding, Hongyao; Tang, Hongyan; Wang, Feng; Zhang, Huapeng; Guo, Yuhai

doi:10.1016/j.matdes.2015.09.037

Cited by 3 publications

(1 citation statement)

References 33 publications

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“…Therefore, in combination with the FTIR results (Figure 5), a possible conclusion would be that in the batch reaction, when increasing the PEGDMA unit content in the BA/PEGDMA ratio, the Tg value of the copolymer increases. According to Ding et al [35], the addition of an acrylamide unit in the butyl methacrylate/acrylamide copolymers increased the intermolecular polarity because of the occurrence of the strong polar group (-NH2), which would also increase the Tg value of the copolymer.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of butyl acrylate-co-poly (ethylene glycol) dimethacrylate obtained by microemulsion polymerization

Alvarado

Rabelero

Aguilar

et al. 2020

Designed Monomers and Polymers

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The synthesis and characterization of copolymers of n-Butyl Acrylate (BA) and Poly(ethylene glycol) dimethacrylate (PEGDMA) were realized by microemulsion. In this synthesis, the relation of PEGDMA 10, 20, 30, 40 and 50% wt with respect to BA was changed. The copolymers obtained were characterized by the determination of conversions (gravimetry), infrared spectroscopy: Fourier transform (FTIR), dynamic light scattering (DLS), thermogravimetry (TGA) and differential scanning calorimetry (DSC). The results confirmed the synthesis of BA-co -PEGDMA copolymers by the identification of characteristic FTIR bands and which determined the glass transition temperature of the copolymers. The conversions were found in the range of 85% to 90%. Within the stability of the produced latex, it was observed that at 10% and 30% wt. of PEGDMA the systems were stable, but when more PEGDMA was added up 40% to 50% wt., the system became unstable. The stability of produced latexes depends on the PEGDMA contents and this must be less than 30% wt.; meanwhile the PEGDMA content greater than 30% wt. leads to unstable latexes, forming clots. Copolymers showed single glass transition temperatures between −53.37°C and −16.58°C, depending on the composition of PEGDMA in the copolymers. Resulting in the different arrangements of units of PEGDMA along in the chain affected the thermal properties of the final copolymers.

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Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of butyl acrylate-co-poly (ethylene glycol) dimethacrylate obtained by microemulsion polymerization

Alvarado

Rabelero

Aguilar

et al. 2020

Designed Monomers and Polymers

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Transformation of the molecular structure of butyl methacrylate/acrylamide/acrylic acid copolymers during heat treatment

2016

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Degradable Gel for Temporary Plugging in High Temperature Reservoir and Its Properties

Yang,

Liu,

et al. 2024

Gels

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Although various degradable gel materials have been developed for temporary plugging in oil fields, they often degrade too quickly in high-temperature environments. To address this issue, an unstable crosslinker was synthesized to prepare a high-temperature degradable gel. This gel does not degrade excessively fast at high temperatures. Temperature and crosslinker concentration are the primary factors influencing gel degradation time, followed by monomer and initiator concentrations. Increased temperature and decreased crosslinker concentration both reduce degradation time, which can be adjusted within the range of 90–130 °C by varying the crosslinker concentration. The molecular structure and thermal stability of the degradable gel were analyzed using FTIR, 13C NMR, and TG. Furthermore, the viscoelastic properties, compressive performance, plugging performance, and core damage performance of the gel were evaluated. Within the test range of 0.1–1000 Pa, the storage modulus is higher than the loss modulus. The gel prepared at 130 °C exhibited a compressive stress of 0.25 MPa at 50% strain. The plugging pressure of the gel in sand-filled tubes with varying permeabilities (538.2–2794.1 mD) exceeded 15 MPa while maintaining a core damage rate below 5%. SEM analysis indicated that the degradation mechanism of the gel may involve the collapse of its three-dimensional network structure due to the hydrolysis of amide groups in the crosslinker. The viscosity of the degradation liquid was below 11 mPa·s, enabling it to be brought back to the surface with the formation fluid without the need for further breaking operations.

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The molecular structure control of butyl methacrylate/acrylamide (co)polymers

Cited by 3 publications

References 33 publications

Synthesis and characterization of butyl acrylate-co-poly (ethylene glycol) dimethacrylate obtained by microemulsion polymerization

Synthesis and characterization of butyl acrylate-co-poly (ethylene glycol) dimethacrylate obtained by microemulsion polymerization

Transformation of the molecular structure of butyl methacrylate/acrylamide/acrylic acid copolymers during heat treatment

Degradable Gel for Temporary Plugging in High Temperature Reservoir and Its Properties

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