JOURNAL OF POLYMER ENGINEERING
·
2024
·Vol. 44
·期 9
·603-614
·
IF 1.7
Chengcheng Liu,Shibin Wang,Fei Jia,Bo Zheng,Shuaishuai Li,Yuheng Yang,Yang Gao,Jinzhou Zhao
A novel hydrophobic association copolymer (PAMA) was synthesized by incorporating acrylamide (AM), 2-acrylamide-2-methylpropanesulfonic acid (AMPS), cationic monomer (MEDDA), and methyl methacrylate (MMA). The properties of MMA copolymers with varying contents were analyzed using infrared spectroscopy, nuclear magnetic resonance spectroscopy, and scanning electron microscopy. Optimal overall performance of the solution was achieved when the MMA content reached 1.4 % w/w. Compared to pure PAAM (without MMA), the PAMA-1.4 % polymer exhibited superior viscoelasticity, temperature resistance, and shear resistance. This enhancement in PAMA performance can be attributed to the significant inhibition of intermolecular water film formation within the polymer matrix by MMA, effectively improving and regulating solution solubility while strengthening molecular chain interactions and enhancing the structural network strength of PAMA polymers. Additionally, the inclusion of MMA transformed rock surfaces from non-wetting to wetting conditions, thereby greatly improving oil displacement efficiency. In displacement experiments, PAMA-1.4 % performed better in terms of enhanced oil recovery, the recovery rate of 0.1 % w/w PAMA-2.4 % solution is only 7.78 %, while the recovery rate of 0.1 % w/w PAMA-1.4 % solution is 13.06 %.
研究领域:
石油工程
·
材料科学
✓ 已验证
DOI
高影响因子
POLYMER
·
2017
·
IF 3.684
Mingsen Chen,Hongwang Zhou,Li Zhou,Faai Zhang
Rod-like mesoporous SBA-15 silica particles were surface modified by different silane coupling agents firstly, then polymethyl methacrylate (PMMA) was prepared in the confined nanopores of the SBA-15 via activators regenerated by electron transfer for atom transfer radical polymerization (ARGET ATRP). The PMMA/SBA-15 nanocomposites and PMMAs inside the nanopores were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption measurements, gel permeation chromatography (GPC), fourier transform infrared spectroscopy (FT-IR), thermogravimetry analysis (TGA), proton magnetic resonance ( 1 H NMR), and differential scanning calorimetry (DSC), respectively. The results demonstrated that the nanopores of SBA-15 could serve as nanoreactors and had great confinement effects on the MMA polymerization. The morphology of PMMAs obtained in the channels was similar to that of intrinsic structure of SBA-15. The thermal stability, molecular weights , isotacticity of PMMAs inside the pores were all increased significantly compared to the conventional PMMA by ARGET ATRP, while broadened the polydispersity index (PDI) values and reduced the syndiotacticity.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE FORUM
·
2015
·
IF 0
Feng Ye,Si Chen,Guo Dong Tang,Bo Zhen Wu,Meng Ma,Yan Qin Shi,Xu Wang
Three kinds of amide dendritic branches, Branch1 (COOH), Branch2 (COOH) and Branch3 (COOH), are successfully synthesized. After mixing with diaminoctane, their self-assembly behavior in methyl methacrylate (MMA) is investigated. The structures of the amide dendritic branches are confirmed by 1H-NMR and Mass spectra (MS). The gelation ability of the amide dendritic gelators is researched through tube inversion experiment, the results of which show that different structures led to quite different gelation ability, including gel-sol temperature and critical concentration to form a stable gel. SEM experiments show that three kinds of gelators formed different gel morphologies in MMA.
研究领域:
材料化学
·
超分子化学
✓ 已验证
DOI
POLYMER BULLETIN
·
2024
·
IF 3.1
Gong Zheqing,Chen Lijun
Butyl acrylate, methyl methacrylate, vinyl acetate and tertiary vinyl carbonate (VeoVa10) are the main monomers, and alkyl alcohol polyether sulfosuccinate monoester sodium salt (A-6820) and alkyl alcohol polyoxyethylene ether (EFS-900) are used as the emulsifiers. Vinyl triethoxysilane is used as the modified monomers. Potassium persulfate is the initiator. The silicon-modified polymer latex is prepared via the semi-continuous seeded emulsion polymerization. The structure of the latex film is characterized by Fourier transform infrared spectroscopy. Latex films are tested by the thermogravimetric analysis, differential scanning calorimetry and contact angle. The particle size of the latex is measured with the zetatrac dynamic light scattering instrument. The conditions for preparing the resultant latex is optimized and obtained as follows: the amount of emulsifier is 6 wt%; the amount of initiator is 0.4 wt% and the amount of VETS is 4 wt%. The appearance of the resultant latex is translucent and blue, and the average particle size of the polymer latex and its distribution is small. The water contact angle increased from 68.07 to 91.00 °. Thermal decomposition temperature of the film of the silicone-modified polymer latex is 16.17 °C higher than that of the film of conventional polymer latex.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2016
·Vol. 23
·期 5
·1-5
·
IF 1.969
Wang Guo-Xiang,He Jie-Yu,Liu Li-Chao,Wu Hu,Zhong Ming
In this work, photoinduced free radical polymerization of methyl methacrylate (MMA) was performed at ambient temperature in dimethyl sulfoxide with chlorophll A as a photosensitizer. Well controlled polymerization of MMA was achieved. The linear first order plot of ln([M] 0 /[M]) vs time was observed. Well-defined polymethyl methacrylates (PMMA) with narrow molecular weight distribution (M w /M n ) were prepared. It indicated that the polymerization was controllable. The chain-end fidelity was demonstrated by 1 H NMR spectra. Chain extension experiments demonstrated the living feature of polymerization. The initiation and moderation of polymerization were manipulated by the periodic light on-off experiments.
研究领域:
高分子化学
·
光化学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2011
·
IF 0.816
Jianming Xu,Si Chen,Guodong Tang,Xu Wang
Three kinds of amide dendritic gelators, G1-C12-G1, G2-C12-G2 and gelator-1, were synthesized, and their self-assemble behavior in methyl methacrylate (MMA) was firstly investigated. The structures of the amide dendritic gelators were confirmed by 1H-NMR and Mass spectra (MS). The gelation ability of the amide dendritic gelators was researched through tube inversion experiment, the results of which showed that different structures led to quite different gelation ability, including gel-sol temperature and critical concentration to form a stable gel. SEM experiments showed that three kinds of gelator formed different gel morphologies in MMA, all of which were nanoscale gel. All the three amide dendritic gelators could not only form stable gel network at certain temperature with different concentrations in MMA, but also in each case, an optically transparent gel was formed, which indicated dendrimers in the MMA had a good compatibility.
研究领域:
材料科学
·
高分子化学
·
超分子化学
·
纳米材料
·
有机合成
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·
IF 13.325
Hu Yuanxia,Ma Jinghong,Gong Jinghua
The hydrophobic random copolymer P(HEMA-MMA-SMA) which contained 2-hydroxyethyl methacrylate (HEMA), methyl methacrylate (MMA) and stearyl methacrylate (SMA) chains was successfully synthesized via radical polymerization. The composites membranes of poly (vinylidene fluoride) (PVDF) and P(HEMA-MMA-SMA) blends and PVDF/P(HEMA-MMA-SMA)/SiO 2 were prepared by electrospinning. Scanning Electron Microscopy (SEM) and Water Contact Angle (WCA) revealed that morphology and hydrophobic properties of the membrane surface. With the condition of 12 wt% SiO 2 , the maximum WCA (154°) of the electrospun composite film can be obtained. Superhydrophobic materials have been widely used in the fields, such as oil-water separation and self-cleaning. Keywords Methacrylate Poly(vinylidene fluoride) SiO 2 Random copolymer Blends Superhydrophobic Electrospinning Membranes
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER ENGINEERING
·
2015
·Vol. 35
·期 9
·847-857
·
IF 0.465
Jingshui Xu,Denglong Chen,Xianglong Hu,Yangchuan Ke,Qian Zhou,Wensuai Gao,Zheling Zeng,Guoliang Zhang
The poly(methyl methacrylate-ethylene glycol dimethacrylate-2-acrylamido-2-methylpropanesulfonic acid) [poly(MMA-EGDMA-AMPS)] microsphere was produced by a soap-free emulsion polymerization of MMA, EGDMA and AMPS. The chemical composition, morphology, particle size distribution and properties of the obtained microspheres were characterized by energy dispersive spectrometer (EDS), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), a laser particle analyzer and thermogravimetric analysis (TGA). Results showed that the microspheres had a high-quality spherical morphology, irrespective of the components, and their particle sizes mainly ranged from 10 μm to 70 μm. The microspheres were thermally stable up to 190°C. As the AMPS loading was increased, the synthetic yield rate decreased and the water uptake increased. The optimum synthetic yield rate and water uptake were obtained at a 2.0 wt% AMPS. In addition, the selected microspheres with a diameter of approximately 25 μm provided an effective plugging, and the plugging rate was up to 80%. This study demonstrated that the plugging behavior of microspheres was due to their deformation, migration and aggregating properties in the plugging process, which made them potential materials for modifying the porous reservoir to enhance oil recovery in petroleum engineering.
研究领域:
材料科学
·
石油工程
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2016
·
IF 2.632
Huijing Li,Junjie Yuan,He Qian,Limin Wu
In this study, we have successfully introduced siloxane monomer, 2,4,6,8-Tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane (V 4 ) into the shell of silica/poly(methyl methacrylate-butyl acrylate) (SiO 2 /P(MMA-BA)) core–shell nanocomposite colloids via in-situ emulsion copolymerization. The obtained nanocomposite films with 50% silica content all show excellent transparency (nearly 100% transmittance in visible range) and film-forming property (T g under 30 °C). More importantly, the addition of V 4 can significantly increase the weathering durability of the film by improving the water repellency, cross-linking degree and UV-blocking property of the film.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2017
·Vol. 29
·期 1
·442-450
·
IF 1.907
Suchen Jiang,Huanchao Liu,Xue Zhang,Yajun Ren,Xinxiang Cui,Xiaofeng Song
Electrospun biodegradable fiber mesh is a promising alternative scaffold for delivering progenitor cells for repairing damaged or diseased tissue, but its cripple mechanical stability has not met the requirement of tissue engineering yet. In this work, the well-defined poly(ε-caprolactone)-branched poly(methyl methacrylate- co -hydroxyethylmethacrylate) (PCL-PMH) has been successfully synthesized to toughen electrospun poly( l -lactide) (PLLA) fiber membrane. Characterization of the obtained nanofibrous meshes indicates that PCL-PMH and PLLA can be well blended to make smooth fibers, and fibrous diameter vary little with blending PCL-PMH. The aggregation state of two macromolecules is closely correlated with blend ratio, molecular structure, and molecular weight of PCL-PMH, and only when PCL-PMH and PLLA form good interfacial adhesion can PMH give full play to its potential for toughening the fiber membrane. The tensile strength and elongation at break of the blend are 6.20 MPa and 63.40% under the optimal conditions, respectively, and it also exhibits the representative feature of toughness materials. The blending fiber membrane is as no cytotoxic as original PLLA. This work will provide a new way for toughness of electrospun fiber membrane in practice.
研究领域:
生物材料学
·
组织工程学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xuhui Sun,Lin Zhang,Chengcheng Yu,Guoxin Xie,Yinbo Li,Xiaoyi Wu,Xiaopeng Li,Dan Guo
PTFE fibers exhibit strong inertia and possess restricted interfacial compatibility with resin, thereby constraining the application of PTFE self-lubricating composites. To address this issue, PTFE-g-MMA fibers were synthesized by grafting MMA onto the surface of PTFE fibers using high-energy irradiation and chemical grafting techniques, resulting in the enhancement of the tribological properties (the friction coefficient has been reduced by approximately 42.2% and the wear rate has been reduced by about 87.9%) and mechanical properties (the interlaminar shear strength (ILSS) experienced a substantial increase of approximately 45.8%) of the composites. The influence of grafting modification on the formation of PTFE transfer films and the effect of modification time on the tribological properties of composites were investigated systematically. The results indicated that graft modification disrupted the C–F bond of PTFE and promoted the formation of metal-chelated carboxylates, facilitating the formation of PTFE transfer films on the counter surface. This research could provide a general and feasible strategy for large-scale modification of PTFE fibers with exceptional comprehensive properties.
研究领域:
材料科学
·
复合材料
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 29
·21107-21117
·
IF 3.9
Yang Bai,Jianing He,Jinsheng Sun,Ren Wang,Ruifang Wang
To treat the issue of increased resource wastage due to the higher plugging tendencies of oil-based drilling fluids (OBDF) relative to water-based drilling fluids, this study synthesized a ternary composite oil-absorbing resin and optimized its synthesis parameters. The influence of temperature variations on the resin's oil absorption capacity was assessed. Techniques such as infrared spectroscopy, scanning electron microscopy, TGA-DSC measurements, crosslinking degree analysis, contact angle analysis, X-ray photoelectron spectrometry analysis and examination of the resin's plugging mechanism were employed to investigate its molecular structure, oil absorption properties, and plugging efficiency. Additionally, the impact of various synthesis conditions on the oil absorption expansion rate of the oil-absorbing resin was examined. The findings indicate that the resin developed in this research maintains robust oil absorption capabilities at 160 °C, exhibiting an oil absorption expansion rate of 12.5 g g−1. At this temperature, the composite resin particles effectively sealed leaks of widths 0.25, 0.5, and 0.75 μm. Comparative analysis revealed that adding 3% of these resin particles to OBDF significantly enhanced the sealing of fractures. Remarkably, at 160 °C, OBDF amended with resin particles managed to completely seal fractures measuring 0.25 μm. The novelty of this study is attributed to the utilization of styrene for enhancing the resin's rigidity, coupled with the application of octadecyl methacrylate, which contains long-chain alkyl groups, to optimize the oil absorption and expansion characteristics of the oil-absorbing resin.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）