Polymer Chemistry
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2021
·Vol. 13
·期 3
·402-410
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IF 5.582
Jia-Wei Li,Miao Chen,Ze Zhang,Cai-Yuan Pan,Wen-Jian Zhang,Chun-Yan Hong
The composition and structure of polymers have great influence on their performances. Copolymerization of different monomers is a straightforward method for the fabrication of polymers with different compositions. Generally, such different monomers have similar structures to meet the criterion of one type of polymerization mechanism. Copolymerization of two or more monomers with extremely different structures is very difficult, because the polymerization mechanisms of these monomers are quite different. Herein, we report the hybrid copolymerization of oligo(ethylene glycol) methyl ether acrylate (OEGA) and 2-(phenoxymethyl) thiirane (POMT) mediated by trithiocarbonate in one pot to generate hybrid copolymers via an interconvertible mechanism between reversible addition–fragmentation chain transfer (RAFT) polymerization of OEGA and anionic ring-opening polymerization (AROP) of POMT. Trithiocarbonate acts as an intermediate between the anionic propagating species of thiirane monomers and the radical growing species of vinyl monomers, and the different polymerization mechanisms do not interfere with each other. The universality of such a strategy has been demonstrated by the hybrid copolymerization of various acrylate and thiirane monomers. The hybrid copolymers with similar compositions but different sequence-structures exhibit different self-assembly behaviors. This hybrid copolymerization expands the chemical diversity of artificial polymers, which may provide new opportunities for functional optimization of polymeric materials.
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
AUSTRALIAN JOURNAL OF CHEMISTRY
·
2013
·Vol. 67
·期 1
·103-111
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IF 1.869
Zhulin Weng,Yaochen Zheng,Aijin Tang,Chao Gao
A novel kind of amphiphilic hyperbranched polymer (AHP), poly(2-(dimethylamino)ethyl methacrylate)-co-polystyrene (HPTAM-co-PS), was synthesized via the combination of reversible addition–fragmentation chain-transfer polymerization and self-condensing vinyl polymerization (RAFT-SCVP). HPTAM-co-PS was functionalized via the highly efficient Menschutkin click reaction, resulting in hyperbranched poly(propargyl quaternary ammonium methacrylate)-co-polystyrene (HPPrAM-co-PS) with a hydrophilic quaternary ammonium salt core and hydrophobic PS shell. The average numbers of dye molecules trapped by each molecule of HPPrAM-co-PS (24.2 kDa) were 24.1 for methyl orange (MO), 22.0 for fluorescein sodium (FS), 24.2 for rose bengal (RB), and 238.4 for Congo red (CR). The polymer–dye complexes show excellent colouring effects for both PS and poly(styrene-b-butadiene-b-styrene) (SBS) membranes; the colour of the membrane containing AHP is very stable and uniform. Our work opens an avenue for the design of efficient dye-colouring additives and for the application of hyperbranched polymers in the field of polymer colouring.
研究领域:
材料科学
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高分子化学
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应用化学
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高影响因子
International Journal of Polymer Science
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2018
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IF 1.718
Wenwen Yu,Lijing Zhu,Jiangao Shi,Cunting Zhao
Poly(lactic acid)-block-poly(N,N-dimethylaminoethyl methacrylate) (PLA-PDMAEMA) copolymers were synthesized from aminolyzed PLA via reversible addition fragmentation (RAFT) polymerization. PLA undergoes aminolytic degradation with ethylenediamine (EDA). The kinetics of the aminolysis reaction of PLA at different temperatures and EDA concentrations was investigated in detail. The molar masses of products rapidly decreased in the initial stage at low aminolytic degree. Meanwhile, reactive –NH2 and –OH groups were introduced to the end of shorter PLA chains and used as sites to further immobilize the RAFT agent. PLA-PDMAEMA block copolymers were synthesized. A pseudo-first-order reaction kinetics was observed for the RAFT polymerization of PDMAEMA at a low conversion. By controlling the aminolysis reaction of PLA and RAFT polymerization degree of DMAEMA, the length distributions of the PLA and PDMAEMA blocks can be controlled. This method can be extended to more systems to obtain block copolymers with controllable block structure.
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2013
·Vol. 51
·期 16
·3429-3438
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IF 3.543
Peng Liu,Qian Tan,Liangbo Xiang,Hailiang Zhang
Three series of water-soluble semi-rigid thermo-responsive polymers with well-defined molecular weights based on mesogen-jacketed liquid crystal polymers, poly[bis( N -(2-hydroxypropyl) pyrrolidone) 2-vinylterephthalate] [P(2-HPPVTA)], poly[bis( N -(1-methyl-2-hydroxyethyl) pyrrolidone) 2-vinylterephthalate] [P(1-M-2-HEPVTA)] and poly[bis( N -hydroxypropyl pyrrolidone) 2-vinylterephthalate] (PHPPVTA) have been synthesized via reversible addition-fragmentation chain transfer polymerization. The steric hindrance effects on liquid crystalline property and thermo-responsive behaviors of semi-rigid water-soluble polymers (P(2-HPPVTA), P(1-M-2-HEPVTA), and PHPPVTA) were carefully investigated. From molecular structure, the steric hindrance of P(1-M-2-HEPVTA) is stronger than that of P(2-HPPVTA). Polarized light microscope and one-dimensional wide-angle X-ray diffraction revealed that both the P(2-HPPVTA) and P(1-M-2-HEPVTA) display a columnar nematic phase, indicating that the steric hindrance effect do not affect liquid crystalline behavior of the polymers. The dynamic light scattering results demonstrated that P(1-M-2-HEPVTA) exhibited lower cloud point compared with that of P(2-HPPVTA) at the same mass concentration and the same molecular weight. The more significant molecular weight and concentration dependence on cloud point have been observed in P(2-HPPVTA) solution than in P(1-M-2-HEPVTA) solution. We also discovered that the cloud points of both P(2-HPPVTA) and P(1-M-2-HEPVTA) solution are lower in D 2 O than in H 2 O. It is noted that the cloud point of PM-2 is 9.9 °C lower in D 2 O than in H 2 O, much less pronounced than the cloud point difference of PH-2. The differences of thermo-responsive behaviors between P(2-HPPVTA) and P(1-M-2-HEPVTA) were resulted from the steric hindrance effect existed in their side groups. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013 , 51 , 3429–3438
研究领域:
高分子化学
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材料科学
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高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
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2022
·Vol. 33
·期 7
·2166-2175
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IF 3.348
Wenling Guo,Peng Cao,Fengli Dai,Yonggang Li,Rongmin Wang,Pengfei Song,Yufeng He
The reversible addition-fragmentation chain transfer polymerization (RAFT) is an effective method to control chain growth and regulate active centers in functional materials. Herein, a novel antibacterial material, polymer cations-adjustable porous materials (PCaPM), was successfully synthesized by RAFT and quaternization. First, using 2-(dodecylsulfanylthiocarbonylsulfanyl)-2-methylpropionic acid as the chain transfer agent of RAFT, methyl methacrylate and 2-(dimethylamino)ethyl methacrylate as comonomers, and ethylene dimethacrylate as crosslinking agent, the light-yellow crosslinked block copolymer (PM-PDE), was synthesized by RAFT polymerization. Second, a series of porous materials (PCaPM) were obtained by quaternization of PM-PDE with alternative alkyl halide and swelling effects in water. The composition and structure of PM-PDE and PCaPM were characterized by scanning electron microscope, energy dispersive spectrometer, Fourier transform infrared spectra, 1 H-NMR, Brunauer–Emmett–Teller, and X-ray photoelectron spectroscopy. Their antibacterial properties were also evaluated against Staphylococcus aureus , Escherichia coli , and Valsa mali . Remarkably, PCaPM, containing tertiary amine and possessing high porosity and large specific surface area, presented excellent antibacterial activity. Hence, the resultant PCaPM exhibited excellent antibacterial activity due to the quaternary ammonium salts groups, which has great prospects in application in medical treatment, agricultural antibiotic, emulator, and sewage treatment.
研究领域:
材料科学
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生物医学
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抗菌材料
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DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2023
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IF 6.1
Yuewei Zhang,Liju Tan,Kunpeng Wang,Na Wang,Jiangtao Wang
Chlorpyrifos, as a moderate toxic organophosphorus pesticide, is prone to lingering in the environment and cannot be monitored easily. In this study, a magnetic, microporous, molecularly imprinted polymer was synthesized by using the reversible addition–fragmentation chain transfer polymerization method. The synthesized materials were properly characterized in terms of morphology, selectivity, and sorption capacity and used as sorbents for magnetic solid phase extraction for the selective determination of chlorpyrifos in apple samples. Results showed that the magnetic microporous molecularly imprinted materials were rough and porous spheres at an average size of 5 nm. The materials were highly selective toward chlorpyrifos with a superior sorption capacity of 167.99 mg·g–1 and were resistant to the interference of competitive pollutants. After optimization, the recoveries of chlorpyrifos reached 96.2–106.5%, and the detection limit was 0.028 μg·kg−1 by HPLC. Based on these analytical validation results, the developed method could be effective at determining chlorpyrifos in apples.
研究领域:
环境科学
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分析化学
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农药残留检测
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产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
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2014
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IF 4.517
Wen-Jun Song,Ji-Ping Wei,Su-Ying Wang,Huai-Song Wang
Novel hydrophilic microparticles containing β-cyclodextrin (β-CD) were prepared via one-pot synthesis using reversible addition-fragmentation chain-transfer (RAFT) precipitation polymerization, a “controlled/living” radical polymerization technique. The polymerization was initiated by hydrophilic macromolecular chain-transfer agent [poly(2-hydroxyethyl methacrylate), PHEMA]. The hydrophilic PHEMA on the surface of microparticles can well improve their surface hydrophilicity and lead to their biological compatibility. As chiral restricted access material (RAM), the hydrophilic microparticles can be used for determination of enantiomers in biological samples with direct injection via HPLC analysis.
研究领域:
分析化学
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高分子化学
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生物医学
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DOI
PubMed
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2013
·Vol. 51
·期 13
·2892-2899
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IF 3.543
Xin Wang,Jin-Ping Gao,Qiao-Ling Zhao,Jin Huang,Guo-Liang Mao,Wei Wu,Ying-Nan Ning,Zhi Ma
Well-defined polymethylene- block -polystyrene (PM- b -PS) diblock copolymers were synthesized via a combination of polyhomologation of ylides and reversible addition-fragmentation chain-transfer (RAFT) polymerization of styrene. Trithiocarbonate-terminated polymethylenes (PM-TTCB) ( M n = 1400 g mol −1 ; M w / M n = 1.09 and M n = 2100 g mol −1 ; M w / M n = 1.20) were obtained via an esterification of S −1-dodecyl-S′-(α,α′-dimethyl-α″-acetate) trithiocarbonate with hydroxyl-terminated polymethylene synthesized via polyhomologation of ylides followed by oxidation. Then, a series of PM- b -PS ( M n = 5500–34,000 g mol −1 ; M w / M n = 1.12–1.25) diblock copolymers were obtained by RAFT polymerization of styrene using PM-TTCB as a macromolecular chain-transfer agent. The chain structures of all the polymers were characterized by proton nuclear magnetic resonance ( 1 H NMR), gel permeation chromatography, and Fourier transform infrared spectroscopy. The thiocarbonylthio end-group of PM- b -PS was transformed into thiol group by aminolysis and confirmed by UV–vis spectroscopy. In addition, microfibers and microspheres of such diblock copolymers were fabricated by electrospinning process and observed by scanning electron microscopy (SEM). © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 2892–2899
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
Small Science
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2023
·Vol. 3
·期 7
·2300044
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IF 12.7
Huan Yu,Runlin Zhang,Yong-Guang Jia,Yunhua Chen,Xuetao Shi
Endowing adhesives with both dry and wet adhesion to surfaces from hard substrates to soft biological tissues is challenging. Herein, a branched supramolecular polymer is introduced in dry- and wet-crosslinking forms to adaptively achieve dry and wet interfacial adhesion. The branched supramolecular polymer (PAMU) with multiple pendant functional moieties is prepared by one-pot reversible addition-fragmentation chain transfer polymerization. The PAMU polymer solution can firmly adhere to glass sheets after the water evaporates. The aqueous solution of PAMU polymer with residual double bonds can be further polymerized to form a wet crosslinking network. The hydrogen bonding moieties endow the supramolecular network with self-healing properties, while the in situ polymerization of the PAMU polymer leads to stable adhesion to wet tissues. This study provides a promising approach to develop supramolecular adhesives for versatile adhesion applications.
研究领域:
材料科学
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化学工程
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高分子科学
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生物医学工程
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产品关联
DOI
高影响因子
TALANTA
·
2020
·
IF 5.339
Qiurong Luo,Zhirong Zhong,Yunchao Zheng,Die Gao,Zhining Xia,Lujun Wang
The poly( N -isopropylacrylamide) (NIPAAm) was first polymerized onto the surface of graphene quantum dots (GQDs) functionalized silica as packing materials via reversible addition-fragmentation chain transfer (RAFT) polymerization reaction, which can expand the interaction modes between stationary phase and analytes. A series of characteristic methods were selected to estimate the chemical bonding results of silica, involving Fourier transform infrared spectroscopy (FT-IR), elemental analysis (EA), thermogravimetric analysis (TGA) and scanning electron microscope (SEM). The prepared column can exhibit reversed-phase and hydrophilic interaction modes, which were demonstrated by the retention of eight kinds of target analytes with different Log P values. The column was then applied to separate banlangen granules and further verified by HPLC tandem time-of-flight mass spectrometry (HPLC/QTOF-MS). In conclusion, Sil-GQDs-PNIPAAm stationary phase improved the analysis range and performance of traditional phases, exhibiting flexible selectivity and application prospect for both hydrophobic and hydrophilic analytes.
研究领域:
材料科学
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分析化学
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生物医学
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DOI
高影响因子
POLYMER
·
2015
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IF 3.562
Xue Jiang,Chun Feng,Guolin Lu,Xiaoyu Huang
A homopolymer strategy was developed to synthesize temperature and pH/CO 2 stimulus-responsive homopolymers. A new class of acrylamide monomers bearing oligo(ethylene glycol) unit and N,N -diethylaminoethyl group were designed and prepared through Aza-Michael addition reaction followed by amidation with acryloyl chloride using amino group as a linkage to connect oligo(ethylene glycol), N,N -diethylaminoethyl, and polymerizable double bond groups together. Subsequently, the corresponding homopolymers containing oligo(ethylene glycol) unit and N,N -diethylaminoethyl group in each repeated unit were prepared via RAFT polymerization with controlled molecular weights and relatively narrow molecular weight distributions . The lower critical solution temperature (LCST) of homopolymer was examined to be influenced by molecular weight, salt concentration, and pH value of aqueous solution. The LCSTs of homopolymers could be tuned in a wide temperature window by changing pH value of aqueous solution and it increased with the decrease of pH value. Particularly, CO 2 gas as a unique pH stimulus can also reversibly adjust the solubility of homopolymer without the addition of acids or bases.
研究领域:
高分子化学
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智能材料
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药物递送
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生物医用材料
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刺激响应材料
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DOI
高影响因子
POLYMER INTERNATIONAL
·
2014
·Vol. 64
·期 3
·405-412
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IF 2.247
Tian Lan,Yu Zhang,Haiping Wang,Liping Yang,Wenjie Yang,Yinghan Wang
Aiming to decrease the memory effect of polymer-dispersed liquid crystals (PDLCs), a type of graft macroinitiator, synthesized by reversible addition–fragmentation chain transfer and atom transfer radical polymerization, was employed to prepare PDLCs with graft copolymer matrix in our previous work. Compared with linear copolymer matrix PDLCs prepared using a linear macroinitiator, it was found that, although low-memory-effect PDLCs were obtained, the driving voltage and transmittance of the PDLCs were unfortunately sacrificed to some extent. Thus, it is necessary to improve the electro-optical properties of PDLCs on the basis of the original research performed by us. In the work reported in this article, a kind of linear macroinitiator with high refractive index and another graft macroinitiator with flexible branched chains were employed to prepare PDLCs. The results showed that by using mixed macroinitiators, the electro-optical properties of PDLCs could be improved, and a possible mechanism is proposed.
研究领域:
材料科学
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高分子化学
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光学材料
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）