JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2020
·
IF 1.701
Shentong Li,Jinzhi Liu,Yong Yang,Shuai Qi,Qianping Ran,Jiaping Liu
Synthesis of polyaryl ether (PAE), poly(salicylic acid)-co-poly[p-methylphenyl oxy poly(ethylene glycol) ether] by condensation polymerization and its properties in cement pastes are discussed. The synthesized PAE copolymer was characterized by proton nuclear magnetic resonance (1H NMR) and gel permeation chromatography (GPC). It was proved that PAE could be applied as a high-performance superplasticizer like conventional polycarboxylate ether (PCE). The performances of PAE in cement pastes were tested by the experiments of fluidity, clay tolerance, adsorption, setting time, cement hydration heat, X-ray diffraction (XRD), and its working mechanism was proposed through zeta potential and adsorbed layer thickness analysis. This research can provide useful guidance for the exploration of novel PCE-type superplasticizers in future studies.
研究领域:
建筑材料
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2012
·
IF 3.85
Qiang Zhang,Baijun Liu,Wei Hu,Wan Xu,Zhenhua Jiang,Wei Xing,Michael D. Guiver
Two series of novel side-chain-acid poly(arylene ether)s bearing aliphatic-chain-linked sulfophenyl pendants are synthesized by direct polycondensation reactions derived from a new sulfonated difluoro-monomer, sodium 4-(3-(4-(2,6-difluorobenzoyl)phenoxy)propoxy)benzenesulfonate. The sulfonation content is readily controlled by adjusting the feed ratios of sulfonated and unsulfonated monomers. The obtained polymers exhibit considerably reduced dimensional swelling and good proton conductivities. It is found that the cyano-functionalized poly(arylene ether)s exhibit lower water uptake and dimensional swelling in comparison with the corresponding SPAE series. SPAEK-3 with an ion exchange capacity of 1.5 mequiv g −1 has proton conductivity of 0.12 S cm −1 and water swelling ratio of only 26% at 100 °C. Importantly, obvious hydrophobic/hydrophilic phase separation morphology is observed, which may be highly related with their good proton transport ability.
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 MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 6
·1-9
·
IF 2.8
Feng Mengna,Li Ruitong,Peng Hongke,Shan Jianan,Wang Wenxiang,Song Chenglong,Lin Jing
The polymeric dielectric materials with flexibility, better thermal stability and high dielectric constant have drawn increasing attention due to the wide applications in electrical systems. Herein, the polymer-based dielectric composites were designed by the infiltration of polyaniline (PANI) coated barium titanate (BT) into poly(arylene ether nitrile) (PEN) matrix. It is demonstrated that the dielectric constant of composites could be as high as 15.3@1 kHz, which is approximately 4 times higher than that of pure PEN matrix ( ε r ≈ 3.8@1 kHz). Meanwhile, the maximum dielectric loss of composites (tan δ ≈ 0.0403@1 kHz) remains comparable to that of PEN (tan δ ≈ 0.0147@1 kHz). This phenomenon attributes to the large charge accumulation and interfacial polarization on the interfaces between PANI, BT and PEN. The better interconnectivity caused by the π – π conjugation and hydrogen bond interactions between PANI interlayer and PEN matrix also can facilitate the polarization transmission throughout PANI coating, substantially enhancing dielectric constant. Besides, the PANI-BT/PEN composite films present better thermal stability ( T 5% > 500 °C) and flexibility. This work provides an eco-friendly and easy-handling strategy as alternative way to fabricate high-performance PEN-based dielectric composites.
研究领域:
材料科学
·
高分子化学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2014
·
IF 1.09
Yongpeng Wang,Haibo Zhang,Mengzhu Liu,Yingshuang Shang,Yingjian Lin,Zhenhua Jiang
A novel poly(arylene ether sulfone) (PAES) with pinacol phenylboronate pendants (PAES-B) was prepared by the borylation of brominated PAES (PAES-Br). The reaction was carried out under mild conditions in the presence of cuprous iodide and tri-n-butylphosphine in tetrahydrofuran solution. After heat treatment at 150°C for 132 h, the PAES-B exhibited an interesting solvent resistance. Fourier transform infrared spectroscopy (FTIR) and thermal analysis were performed to investigate the reason. FTIR spectra showed that heat treatment could facilitate losing of pinacol groups and formation of phenylboronic acid in the polymer. Meanwhile, differential scanning calorimetric (DSC) curves demonstrated that the polymer had cross-linking behaviors during heat treatment. In addition, the thermal oxidative stability of PAES-B was researched by the thermogravimetric analysis (TGA).
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Guolong Rong,Di Zhou,Xiaocui Han,Jinhui Pang
Zwitterionic poly(arylene ether sulfone) (PAES-NS) was synthesized via copolymerization by using a bisphenol monomer with a pyridine group. The chemical structures of the copolymers were confirmed by using Fourier transform infrared (FTIR) and 1 H nuclear magnetic resonance (NMR) spectroscopy; the copolymers showed good thermal stability. A series of polyphenysulfone (PPSU)/PAES-NS blend ultrafiltration (UF) membranes was prepared via conventional immersion precipitation phase inversion methods The morphologies of the modified membranes were investigated by scanning electron microscopy (SEM). The surface hydrophilicity of the UF membranes was studied by water contact angle measurement, indicating that the zwitterionic group increased the membrane hydrophilicity. UF of solvated model pollutants using the membranes showed a significant reduction of the irreversible adsorption of the foulants, illustrating the excellent anti-fouling properties of the membrane. The water flux of the PAES-NS membrane was significantly enhanced, being almost three times higher than that of the pristine PPSU membrane, with retention of a high rejection level. After three UF cycles, the water flux recovery of the PAES-NS membrane was as high as 96%.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 65
·37348-37355
·
IF 2.936
Yuxuan Zhang,Shanyong Chen
In this paper, two novel azobenzene-containing poly(aryl ether)s with different absorption wavelengths were synthesized via Ullmann coupling and Sonogashira coupling, respectively. The obtained polymers were characterized and evaluated by elemental analysis, IR, 1H NMR, UV-vis, DSC and TGA. Rare earth complexes were prepared by using the two novel azobenzene-containing poly(aryl ether)s as macromolecular ligands. The obtained rare earth complexes were characterized by elemental analysis, IR and WAXD. The influence of the absorption wavelength of azobenzene chromophores on the fluorescent properties was investigated. The polymer whose absorption wavelength was far from the excitation wavelengths of the rare earth complexes showed a much larger fluorescence intensity. By exposing the films of the rare earth complexes to two interference laser beams, SRGs can be formed on the films and can also be detected by fluorescence microscopy measurement.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Zhaoyang Wang,Bo Jiang,Yunhe Zhang,Xuefeng Li,Yongpeng Wang,Yingshuang Shang,Haibo Zhang
The rapid development of high-speed communication networks (for example, 5G) has imposed more stringent requirements on the comprehensive performance of low dielectric constant (low- k ) polymeric materials, as an important member of which, fluoropolymer has gained much attention. In this study, a series of cross-linkable fluorinated poly(aryl ether)s with different phenylethynyl content have been synthesized through nucleophilic substitution reaction, then their polymeric films have been prepared and thermally cross-linked via phenylethynyl groups. Thermal, mechanical and dielectric properties of the films are systematically compared. Due to the presence of F atoms and cross-linked structure in polymer chains, these polymeric films exhibit remarkable dielectric properties with the lowest dielectric constant < 2.4 and dissipation factor < 0.003 at frequency from 100 Hz to 1 MHz. Moreover, the dielectric performance shows impressive temperature independence before 200 °C. Excellent mechanical properties of the films have been corroborated by the DMA data of Young’s modulus > 1.50 GPa and modulus retention rate > 70%. It is noteworthy that polymeric films possess very low dielectric constant and dielectric loss at high frequency of 10 GHz, of which the lowest values can reach 2.47 and 0.0018, respectively. The polymeric films constructed in this study have shown great application prospects in the field of high-speed communication.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2021
·
IF 3.927
Mengna Feng,Deyu Ma,Xuanrong Chen,Pan Wang,Jing Lin
Polymer-based dielectric composites are potential substitute dielectrics for organic thin film capacitors. In this work, the exfoliated molybdenum disulfide (MoS 2 ) was functionalized by mussel-inspired poly(dopamine) (PDA) to form core-shell structured composites (MoS 2 @PDA) under easy-handling and eco-friendly conditions, and then as filler incorporated into poly(arylene ether nitrile) (PEN) matrix. The interfacial interaction and dispersion of MoS 2 @PDA in PEN matrix were improved by the strong adhesion of PDA interlayer to exfoliated MoS 2 , π-π conjugation and hydrogen bond interactions, which formed by the polar nitrile group of PEN and catechol groups of PDA. Therefore, the PEN/MoS 2 @PDA composite films exhibited enhanced dielectric constant, synchronously maintaining better flexibility, thermal stability and the same level of dielectric loss with PEN. Particularly, the addition of 20 wt% MoS 2 @PDA into PEN matrix leaded to substantial growth of dielectric constant up to 12.9 at 1 kHz, while the PEN matrix was just 4.2. Meanwhile, the dielectric composites maintained relatively low dielectric loss of 0.022 at 1 kHz, which was ascribed to the improved compatibility and interfacial interaction between filler and PEN. All in all, a eco-friendly and easy-handling strategy was provided to tune the dielectric constant and dielectric loss of semiconductor/polymer composites, which has great potential to promote the development of dielectric in the fields of organic thin film capacitors.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 40
·14139-14145
·
IF 7.393
Yuxuan Zhang,Xue Zhao,Jianhang Yuan,Xialei An,Xuefang Sun,Jie Yi,Xi-Ming Song
The research on the photomechanical effects of azobenzene-containing high performance polymer materials has received much attention due to their potential applications in high temperature environments. At present, there are few types of photoinduced deformable polymers based on azobenzene-containing high performance polymers, and their photoinduced deformation rates need to be improved. In this paper, a novel series of azobenzene-containing poly(arylene ether)s with various contents of binaphthalene groups were synthesized. Introducing binaphthalene groups into azobenzene-containing poly(arylene ether)s was a helpful strategy to increase the free volume, which could increase the photoinduced deformation rates of the polymers. Under 442 nm unpolarized laser irradiation, the photoinduced deformation rates increased with the contents of binaphthalene groups of the polymers. Under 442 nm polarized laser irradiation, the cantilevers of the azobenzene-containing poly(arylene ether)s have shown unusual photoinduced deformation behavior. When the polarization direction of the polarized laser was perpendicular to the long axis of the cantilevers of the polymers, the cantilevers bent away from the excitation laser at the beginning, then bent towards the excitation laser and could reach the initial position. The angles of the polymers bent away from the excitation laser increased with the contents of binaphthalene groups of the polymers. The photoinduced deformation behavior of the polymers could be adjusted by adjusting the polarization direction of the polarized laser, the laser power and the thickness of the cantilevers of the polymer. This interesting phenomenon has not been reported in previous research on the photoinduced deformation behavior of azobenzene-containing high performance polymers.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 11
·e53628
·
IF 3
Linlin Wang,Minjie Qu,Zhipeng Wang,Honghua Wang,Jiyong Zhao,Guangyuan Zhou
Poly(arylene ether)s with different molecular weights were synthesized via a two-step nucleophilic substitution polymerization by adjusting reaction parameters based on phenolphthalein (PHT) and decafluorobiphenyl (DFBP). The chemical structures and properties were identified by Fourier transform infrared, NMR, gel permeation chromatography, differential scanning calorimetry, thermogravimetric analysis, dynamic thermomechanical analysis (DMA), and so forth. The number-average molecular weight (M n ) of the resulting polymers was in the range of 23.0–49.3KDa. FPAEs (polyarylether including perfluorobiphenyl structure) were demonstrated to have outstanding thermo-resistance with 5% weight loss temperature of about 482–520°C (N 2 ) and high-glass transition temperature (about 240–250°C). FPAEs can be dissolved in conventional organic solvents, possessing excellent film-forming properties. The good mechanical properties of FPAEs were confirmed by the DMA data, with Young's modulus greater than 1.0 Gpa and modulus retention rate at 230°C >67%. FPAEs also showed good hydrophobicity and low-water absorption, in particular, FPAE-1 (FPAE-1-5 were the polycondensation products of PHT and DFBP, just the polymerization conditions were slightly modified) exhibited favorable dielectric properties: at 1 MHz, the dielectric constant and dielectric loss was 2.58 and 0.0053, respectively. Thus, FPAE-1 has broad prospective applications in microelectronic devices and communication technology.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
POLYMER BULLETIN
·
2011
·Vol. 67
·期 9
·1761-1771
·
IF 1.215
Zhu Ming,Liu Xiao,Liu Baijun,Jiang Zhenhuan,Matsumoto Toshihiko
A new diamine monomer, 1,5-bis[4-(4-aminophenoxy)]benzoyl-2,6-dimethoxynaphthalene, was synthesized via a Friedel–Crafts acylation reaction followed by an aromatic nucleophilic substitution reaction. Six ether–ketone linked polymers, named as poly(ether ketone azomethane)s and poly(ether ketone imide)s, were successfully prepared through the polycondensations of the diamine monomer with dialdehydes and dianhydrides, respectively. These naphthylated polymers exhibited high T
g values (142–288 °C), due to their bulky and rigid chemical structure. Meanwhile, they showed good thermal stability and improved solubility. Typically, some of them were casted into thin flexible film and showed high moduli.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 42
·24772-24783
·
IF 3.119
Shouping Wang,Fugang He,Qiang Weng,Diao Yuan,Pei Chen,Xinbing Chen,Zhongwei An
A series of novel crosslinkable side-chain sulfonated poly(arylene ether sulfone) copolymers (S-SPAES(x/y)) was prepared from 4,4′-biphenol, 4,4′-difluorodiphenyl sulfone, and a new difluoro aromatic monomer 1-(2,6-difluorophenyl)-2-(3,5-dimethoxyphenyl)-1,2-ethanedione (DFDMED) via co-polycondensation, demethylation, and further nucleophilic substitution of 1,4-butane sultone. Meanwhile, quinoxaline-based crosslinked copolymers (CS-SPAES(x/y)) were obtained via cyclo-condensation between S-SPAES(x/y) and 3,3′-diaminobenzidine. Both the crosslinkable and crosslinked copolymer membranes exhibit good mechanical properties and high anisotropic membrane swelling. Crosslinkable S-SPAES(1/2) with an ion exchange capacity (IEC) of 2.01 mequiv. g−1 displays a relatively high proton conductivity of 180 mS cm−1 and acceptable single-cell performance, which is attributed to its good microphase separation resulting from the side-chain sulfonated copolymer structures. Compared with S-SPAES(1/1) (IEC of 1.68 mequiv. g−1), crosslinked CS-SPAES(1/2) with a comparable IEC exhibits a larger conductivity of 157 mS cm−1, and significantly higher oxidative stability and lower membrane swelling, suggesting a distinct performance improvement due to the quinoxaline-based crosslinking.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）