POLYMER SCIENCE SERIES B
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2026
·Vol. 68
·期 4
·21
·
IF 0.9
Xingbing Yang,Tang Cheng,Yan Wenyu,Xie Yi,Xu Xinyue,Li Yanxue,Chen Gang,Zhao Wenting
Activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP) represents a significant advancement in reversible deactivation radical polymerization, offering substantially reduced catalyst loadings while maintaining precise control over molecular architecture. This study presents a comprehensive kinetic investigation of CuBr 2 /PPh 3 catalytic ARGET ATRP of ethyl acrylate, methyl methacrylate, and butyl acrylate with particular emphasis on its application in the preparation of acrylate emulsions. The results demonstrate that increasing the ligand concentration effectively enhanced both monomer conversion and the apparent propagation rate constant. The polymerization rate reached a maximum at a catalyst to ligand molar ratio of 1 : 2. At a polymerization temperature of 90°C, both monomer conversion and apparent growth rate attained their peak values, yielding an apparent activation energy of 56.5 kJ/mol. Furthermore, increasing the reducing agent concentration resulted in concomitant increases in both monomer conversion and copolymerization rate. This catalytic system was successfully applied to the emulsion polymerization of three monomers and stability of the isolated emulsions was explored. It is demonstrated that pretty low catalyst loading CuBr 2 /PPh 3 -catalyzed ARGET ATRP could be a plausible practical method for the preparation of acrylate emulsions.
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DOI
高影响因子
Materials Today Communications
·
2020
·
IF 2.678
Lili Wang,Panpan Hao,Xiaomeng Chu,Yujuan Sun,Xuteng Xing,Shaojie Liu,Erjun Tang,Xiaodong Xu
With 2,2,6,6-tetramethylpiperidin-4-yl methacrylate (TMPM) and styrene (St) as monomers, the block copolymer brush of PS-PSt-PTMPM was grafted on micro-sized polystyrene microsphere via the electron transfer regenerated catalyst atom transfer radical polymerization (ARGET ATRP). The piperidine groups of PTMPM block were then oxidized to nitroxide radicals by 3-chlorobenzoic acid and PSt block was sulfonated with sulfuric acid to give the dual-functionalized block copolymer brush of PS-PSH-PTMA containing both nitroxide radicals and sulfonic acid groups. PS-PSH-PTMA was used for the direct esterification of methacrylic acid (MAA) and methoxy poly(ethylene glycol) (MPEG) for synthesis of methoxy poly(ethylene glycol) methyl acrylates (MPEGMA) instead of free acid catalyst of p-toluene sulfonic acid and free inhibitor of 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO), since the immobilized TEMPO units prevented the undesired radical self-polymerisation and the immobilized sulfonic acid residues catalyzed the esterification. The results showed that the esterification rate of MPEGMA with PS-PSH-PTMA as catalyst and inhibitor was over 99% and the reaction rate was twice as high as that with p-toluene sulfonic acid as catalyst and TEMPO as inhibitor. Furthermore, PS-PSH-PTMA could be easily recovered by filtration and the recycling performance was excellent.
研究领域:
高分子化学
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催化化学
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材料科学
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DOI
高影响因子
RSC Advances
·
2012
·Vol. 2
·期 13
·5571-5579
·
IF 0
Longcheng Xu,Jianming Pan,Jiangdong Dai,Zhijing Cao,Hui Hang,Xiuxiu Li,Yongsheng Yan
This paper reports a molecularly imprinted polymers (MIPs) based fluorescence sensor which is synthesized by grafting MIP layers on the surface of ZnO nanorods embedded γ-Fe2O3 nanoparticles via activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP). Methacrylic acid (MAA, functional monomer), 3-(trimethoxysilyl)propyl mathacrylate (MPS) modified γ-Fe2O3 (γ-Fe2O3/MPS, assistant magnetic monomer) and ethylene glycol dimethacrylate (EGDMA, cross-linking monomer) were co-polymerized in anisole at 313 K in the presence of sulfamethazine as a template molecule. Sulfamethazine was then solvent-extracted to obtain ZnO-grafted molecularly imprinted polymers (ZnO-MIPs). ZnO-MIPs were characterized by FE-SEM, TEM, FT-IR, TGA/DSC, VSM, fluorescence spectroscopy and Raman spectroscopy. It was observed that sulfamethazine can quench the luminescence of ZnO-MIPs in a concentration-dependent manner that can be described by a Stern–Volmer-type equation. ZnO-MIPs were used to determine sulfamethazine in a spiked pork sample with good recognition ability. This study therefore demonstrates the potential application in the recognition and separation of antibiotics based on molecularly imprinted polymers.
研究领域:
材料科学
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分析化学
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生物医学工程
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CELLULOSE
·
2021
·Vol. 28
·期 4
·2433-2443
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IF 5.044
Zhou Yihang,Wang Kai,Hu Dongbo
A previous study on consolidation of waterlogged archaeological wood (WAW) via surface initiated ARGET ATRP of the cell walls has shown its potential of maintaining the dimensional stability. But the defects lie in the unsuitable initiator immobilization methods and polymerization conditions, which impedes its application. Therefore, we are proposing a novel functionalization method for initiator immobilization in water or water/ethanol solution and an improved thermo-initiated ARGET ATRP system. First, mercaptoethylamine (MEA) was used to functionalize WAW with amino groups in water under circumneutral conditions. Then, quinone-based initiators reacted with those amino groups realizing its immobilization. Finally, by using less active reductants such as ascorbic acid 2-glucoside and glucose, monomer, catalyst, and reductant were able to permeate into the WAW samples at room temperature and polymerization was initiated by heating to 60 °C (for ascorbic acid 2-glucoside) or 80 °C (for glucose). Both satisfying uniformity and dimensional stability (77.0–85.1% ASE) can be achieved through the described approach. Moreover, the described functionalization methods may also provide reference for WAW consolidation material designs and applications in other lignocellulosic materials in the future.
研究领域:
考古学
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高分子科学
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文物保护科学
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高影响因子
EUROPEAN POLYMER JOURNAL
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2022
·
IF 5.546
Yejun Luo,Zheng Li,Yufang Chen,Tao Jin
Hydrophobic modification of cellulose via activation synergistic activators regenerated by electron transfer (ARGET) atom transfer radical polymerization (ATRP) method has been proved to effectively improve the long-term hydrophobic stability of cotton filter fabric. However, the extra activation process will inevitably increase the complexity of the reaction process. In this work, carbon disulfide (CS 2 ) was incorporated into the ARGET-ATRP reaction system to avoid adding redundant reaction links. Specifically, the activation and acyl bromination processes were combined, and then the graft modification reaction between the acyl bromide cotton filter fabric and 1-octadecene (1-Oct) was realized by the ARGET-ATRP. The effect of the combined process on the hydrophobic modification reaction and performance of cotton filter fabric was investigated. The results showed that, under the optimum dosages of activator CS 2 , acyl bromide reagent BiB and monomer 1-Oct, the activator CS 2 was directly incorporated into the acyl bromination process. And after ARGET-ATRP Hydrophobic modification, the initial water contact angle (CA) of the obtained hydrophobically modified cotton filter fabric reached 145.0°, the residual contact angle (RCA) after the water droplet retention time of 210 min could still arrive at 125.4°, showing a corresponding attenuation rate (Dr) of 13.5%, which suggested excellent hydrophobicity and durability. Notably, the hydrophobically modified cotton filter fabric also exhibited excellent resistance to chemical corrosion, abrasion resistance and ultrasonic stripping resistance. Furthermore, this hydrophobically modified filter fabric can efficiently separate different types of oil–water mixtures. Even after 12 cycles of oil–water separation process, the separation efficiency still exceeded 95%, and the CA of the modified filter fabric before and after separation was basically unchanged.
研究领域:
材料科学
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纺织工程
·
高分子化学
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DOI
高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Changjie Yin,Boyu Wang,Huimin Li,Dezhong Yin,Qiuyu Zhang
The vinyltriethoxysilane grafted styrene-butadiene rubber (SBR-g-VTES) was successfully synthesized using the ARGET-ATRP (electron transfer activated regenerative atom transfer radical polymerization) method in latex. Then, SBR-g-VTES/SiO 2 composites were prepared without a silane coupling agent. The effect of various reaction conditions on the grafted yield, properties, and morphology of SBR-g-VTES was investigated, and the influence of different silica amounts on the properties of SBR-g-VTES/SiO 2 composites was also discussed. The polymerization process conformed to the characteristics of active/controllable. The reaction condition SBR/CuBr 2 /TPMA/VC (100.00/0.0010/0.0015/0.30) was chosen. The tensile strength of SBR-g-VTES reached 4.20 MPa, and the tear strength reached 40.00 MPa. When the amount of silica was 30 wt%, the bound rubber, tensile strength, tear strength, and hardness of SBR-g-VTES/SiO 2 composites reached 78%, 12.30 MPa, 97 MPa, and 91 shore A, respectively. The Akron abrasion is 0.03 cm 3 ; a good balance between the wet sliding resistance and the low rolling resistance of the material can be realized. Meanwhile, SEM analysis results showed that the compatibility between silica and the rubber matrix was greatly improved by grafting VTES; SiO 2 was uniformly dispersed in the SBR matrix with a regular round shape.
研究领域:
高分子科学
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材料工程
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化学合成
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纳米复合材料
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橡胶技术
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DOI
高影响因子
ADVANCES IN POLYMER TECHNOLOGY
·
2021
·
IF 2.389
Shuangshuang Wang,Houfang Chi,Lin Chen,Wei Li,Yuchao Li,Guang Li,Xiangcai Ge
In this work, polymethyl methacrylate (PMMA) and polystyrene (PS) with controlled structures would be grafted on graphene material. The hybrid materials were prepared by coating graphene oxide (GO) with polydopamine (PDA) as a reactive underlayer and reducing agent, subsequently, surface-initiated polymerization of monomers (methyl methacrylate, styrene) based on the activators regenerated electron transfer atom transfer radical polymerization (ARGET-ATRP) technique. The polymer brush-modified graphene materials were then incorporated into the PMMA or PS matrix to get polymer nanocomposites with better thermal properties. The results of Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermal gravimetric analysis (TGA) demonstrated that PMMA and PS chains were successfully anchored on the surfaces of functionalized GO sheets. The influence of the grafted polymer brush-modified GO on thermal stability of PMMA and PS was investigated by a simultaneous thermal analyzer. Thermal conductivity of the polymer nanocomposite was determined by a conductive calorimeter. The results showed that thermal stability, glass transition temperature (), and thermal conductivity of the polymer nanocomposites were obviously improved compared with pure PMMA or PS.
研究领域:
材料科学
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高分子化学
·
纳米技术
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高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 42
·22617-22628
·
IF 14.511
Haicun Yang,Yu Jiang,Kaide Wu,Shuipi Cai,Wenzhong Ma,Zheng Cao,Fanghong Gong,Chunlin Liu,Guoliang Tao,Ji Pan
Here, we report a new facile method to improve both the conductivity and alkaline stability of anion exchange membranes (AEMs) by directly growing poly(ionic liquid) (imidazolium cations, PImIL) from bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) (BrPPO) and the surface of bromobenzylated carbon nanotubes (Br@CNTs) via one-pot simultaneous activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP) and the following ionizing co-crosslink. Both PPO and CNTs are deeply ionized to fabricate a kind of dual-cation organic–inorganic hybrid co-crosslinked network with widening long-range ion transport channels in AEMs, which endows the resultant hybrid membrane with excellent ion conductivity, dimensional stability, and mechanical strength. The PPO-PImIL/PImIL@CNT hybrid co-crosslinked membrane with a higher ion exchange capacity of 2.29 mmol g−1 shows a hydroxide ion conductivity of 189.8 mS cm−1 at 80 °C, about 2.5 times higher than that of pristine imidazolium-modified PPO (ImPPO). Meanwhile, the alkaline stability of the membrane is enhanced due to the steric hindrance offered by CNTs, hydrophobic alkyl chain spacers for cationic functional groups, and the hybrid co-crosslinked network. The optimized interfacial compatibility between PPO-PImIL and PImIL@CNTs also endows the hybrid membranes with considerable tensile strength (26.7 MPa, almost 250% of the pristineImPPO) and thermal stability (higher than 200 °C). The hybrid co-crosslinked AEM (4 wt% of Br@CNTs relative to BrPPO was used) presents an outstanding fuel cell performance with a maximum power density of about 446 mW cm−2 and good durability of the single cell (0.76 mV h−1 of voltage decay rate). The excellent overall performance renders hybrid co-crosslinked AEMs a potential candidate for application in AEMFCs.
研究领域:
化学工程
·
材料科学
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高影响因子
危险品化学品经营许可证（带存储）