Synthesis and properties of poly(aryl ether ketone ketone)/poly(aryl ether ether ketone ketone) copolymers with pendant cyano groups

Yu, Yikai; Xiao, Fen; Cai, Mingzhong

doi:10.1002/app.26062

Cited by 20 publications

(11 citation statements)

References 47 publications

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“…Alternatively, poly(arylene ether nitrile) (PEN) as a semicrystalline special engineering polymer has gained increasing attentions from membrane separation because of its high heat resistance, high thermal stability, and mechanical strength . In addition, the main chain of PEN contains a large number of ether bonds, which make it have good flexibility and molding process . Therefore, PEN is selected as an idea nanofibrous substrate for preparing high‐performance membrane .…”

Section: Introductionmentioning

confidence: 99%

Construction of superhydrophilic/underwater superoleophobic polydopamine‐modified h‐BN/poly(arylene ether nitrile) composite membrane for stable oil‐water emulsions separation

Zhang

Zhan

et al. 2020

Polymers for Advanced Techs

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Oil/water emulsion separation in harsh environments remains a big challenge. Herein, a double layered nanofibrous composite membrane was developed by assembly of polydopamine-modified hexagonal boron nitride (h-BN-PDA) onto a poly(arylene ether nitrile) (PEN) nanofibrous mat. Owing to the synergistic effect of a h-BN-PDA skin layer and a PEN nanofibrous mat supporting layer, as-prepared composite membrane exhibited high thermal stability, corrosion resistance, and superhydrophilic/underwater superoleophobic property. Consequently, the PEN composite membrane showed good antifouling performance and a high rejection ratio (>99.0%) for various oil/water emulsions. After 10 cycles, the separation flux of PEN composite membrane still reached 588.1 L/m 2 h under the operating pressure of 0.04 MPa. Furthermore, the PEN composite membrane could still achieve high separation efficiency and high flux in high-temperature (65 C) and strongly corrosive conditions (pH = 1-13). Therefore, the stable and efficient h-BN-PDA/PEN composite membrane showed potential application for treating oily wastewater in harsh environments. K E Y W O R D S hexagonal boron nitride, oil/water emulsion separation, poly(arylene ether nitrile), stability, superhydrophilic/underwater superoleophobic property 1 | INTRODUCTION Nowadays, the water pollution from oil spills and chemical industries seriously threatens the ecological balance and human health. 1,2Therefore, a variety of methods including gravity separation, 3 centrifugal separation, 4 adsorption separation, 5,6 and biological demulsification 7 are developed for oil/water separation. However, these traditional oil/water treatment technologies have the disadvantages of complicated operation process, low separation efficiency, and secondary pollution. 8 Moreover, they cannot effectively separate oil/water emulsion with a dispersed droplets' size less than 20 μm. 9,10 Recently, membrane separation technology has become a very important technology in the transformation of industrial technology. 11,12 In particular, the electrospun nanofibrous (ENF) membrane is widely applied for oil/water emulsion separation because of its high porosity, high specific surface area, stability, and adjustable function. [13][14][15][16] In order to achieve efficient oil/water separation and overcome the problem of membrane fouling, two kinds of super-wetting membrane materials are constructed: super-hydrophobic/underwater

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Section: Introductionmentioning

confidence: 99%

Construction of superhydrophilic/underwater superoleophobic polydopamine‐modified h‐BN/poly(arylene ether nitrile) composite membrane for stable oil‐water emulsions separation

Zhang

Zhan

et al. 2020

Polymers for Advanced Techs

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“…The copolymerization of PEEK was also investigated to improve its glass transition temperature (T g ), processability at high temperatures, and to obtain low-cost materials [29][30][31][32]; however, the improvement of T g is not so marked for those reported PEEK copolymers. It should be noted that the investigations into the modification of PAEK properties have mainly focused on PEEK by nucleophilic route and, to a lesser extent, on other commercially available PAEKs [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of novel copolymers of poly(ether ketone ether ketone ketone) and poly(ether amide amide ether ketone ketone)

Qian

Zhou

et al. 2013

Polymer Engineering & Sci

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A new monomer, N,N′‐bis(4‐phenoxybenzoyl)‐m‐phenylenediamine (BPMPDA), was prepared via the reaction of m‐phenylenediamine with 4‐phenoxybenzoyl chloride in N,N‐dimethylacetamide. Novel copolymers of poly(ether ketone ether ketone ketone) and poly(ether amide amide ether ketone ketone) (PEAAEKK) were synthesized by the modified electrophilic Friedel–Crafts acylation copolycondensation of terephthaloyl chloride with a mixture of 4,4′‐diphenoxybenzophenone (DPOBPN) and BPMPDA, over a wide range of DPOBPN/BPMPDA molar ratios. The resulting copolymers were characterized by Fourier transform infrared spectroscopy, wide‐angle X‐ray diffraction, differential scanning calorimetry, and thermogravimetric analysis, and so on. The results indicated that the copolymers with 10–30 mol% BPMPDA were semicrystalline and had remarkably increased glass transition temperatures (Tgs) over the conventional poly(ether ether ketone) and poly(ether ketone ketone) due to the incorporation of amide linkages in the main chains. The copolymers III and IV with 20–30 mol% BPMPDA had not only high Tgs of 177–180°C, but also moderate melting temperatures (Tms) of 324–333°C, having good potential for the melt processing. The copolymers III and IV had tensile strengths of 101.8–104.4 MPa, Young's moduli of 2.32–2.46 GPa, and elongations at break of 10.8–12.2% and exhibited high thermal stability and excellent resistance to organic solvents. POLYM. ENG. SCI., 53:2353–2359, 2013. © 2013 Society of Plastics Engineers

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“…To overcome these limitations, organic soluble and thermally stable PAENs have been developed in recent years by the structural modification of polymer backbones, with a view to improving their processability and, hence, broadening their applications, especially as adhesives, coatings, and membranes. These approaches include the incorporation of alkyl pendant groups,10, 11 flexible linkages,12–15 or noncoplanar units16 into the polymer backbones by the design and preparation of new monomers. Recently, our laboratory prepared xanthene‐based cardo poly(arylene ether ketone)s17 and polyamides18 with enhanced solubility, processability, good mechanical strength, and excellent thermal properties with a T g above 210°C.…”

Section: Introductionmentioning

confidence: 99%

New soluble cyano‐containing poly(arylene ether) copolymers bearing pendant xanthene groups

Sheng

Wang

Huang

et al. 2011

J of Applied Polymer Sci

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Homopolymers and copolymers of poly-(arylene ether nitrile) (PAEN)-bearing pendant xanthene groups were prepared by the nucleophilic substitution reaction of 2,6-difluorobenzonitrile with 9,9-bis(4-hydroxyphenyl)xanthene (BHPX) and with various molar proportions of BHPX to hydroquinone (100/0 to 40/60) with N-methyl-2-pyrrolidone (NMP) as a solvent in the presence of anhydrous potassium carbonate. These polymers had inherent viscosities between 0.61 and 1.08 dL/g, and their weight-average molecular weights and number-average molecular weights were in the ranges 34,200-40,800 and 17,800-20,200, respectively. All of the PAENs were amorphous and were soluble in dipolar aprotic solvents, including NMP, N,N-dimethylformamide, and N,N-dimethylacetamide and even in tetrahydrofuran and chloroform at room temperature. The resulting polymers showed glass-transition temperatures (T g 's) between 220 and 257 C, and the T g values of the copolymers were found to increase with increasing BHPX unit content in the polymer. Thermogravimetric studies showed that all of the polymers were stable up to 422 C with 10% weight loss temperatures ranging from 467 to 483 C and char yields of 54-64% at 700 C in nitrogen. All of the new PAENs could be cast into transparent, strong, and flexible films with tensile strengths of 106-123 MPa, elongations at break of 13-17%, and tensile moduli of 3.2-3.7 GPa.

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Synthesis and properties of poly(aryl ether ketone ketone)/poly(aryl ether ether ketone ketone) copolymers with pendant cyano groups

Cited by 20 publications

References 47 publications

Construction of superhydrophilic/underwater superoleophobic polydopamine‐modified h‐BN/poly(arylene ether nitrile) composite membrane for stable oil‐water emulsions separation

Construction of superhydrophilic/underwater superoleophobic polydopamine‐modified h‐BN/poly(arylene ether nitrile) composite membrane for stable oil‐water emulsions separation

Synthesis and properties of novel copolymers of poly(ether ketone ether ketone ketone) and poly(ether amide amide ether ketone ketone)

New soluble cyano‐containing poly(arylene ether) copolymers bearing pendant xanthene groups

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