JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 134
·期 48
·45554
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IF 1.86
Junjie Bao,Can Tao,Ran Yu,Minghao Gao,Yiping Huang,Chunhua Chen
A series of solid polymer electrolytes (SPEs) based on comb-like nonionic waterborne polyurethane (NWPU) and LiClO 4 are fabricated via a solvent free process. The NWPU-based SPEs have sufficient mechanical strength which is beneficial to their dimensional stability. Differential scanning calorimetry analysis indicates that the phase separation occurs by the addition of the lithium salt. Scanning electron microscopy and X-ray diffraction analyses illustrate the good compatibility between LiClO 4 and NWPU. Fourier transform infrared study reveals the complicated interactions among lithium ions with the amide, carbonyl and ether groups in such SPEs. AC impedance spectroscopy shows the conductivity of the SPEs exhibiting a linear Arrhenius relationship with temperature. The ionic conductivity of the SPE with the mass content of 15% LiClO 4 (SPE15) can reach 5.44 × 10 −6 S cm −1 at 40 °C and 2.35 ×10 −3 S cm −1 at 140 °C. The SPE15 possesses a wide electrochemical stability window of 0–5 V (vs. Li+/Li) and thermal stability at 140 °C. The excellent properties of this new NWPU-based SPE are a promising solid electrolyte candidate for all-solid-state lithium ion batteries. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45554.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 47
·45542
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IF 1.86
Shicheng Yan,Yahong Xue,Yulin Yang,Xiaowen Qi,Laizhou Song,Yingbing Sun
In this study, a novel aluminum phosphate (AlPO 4 ) heat-resistant layer reinforced with aluminum silicate fiber (ASF) was successfully compounded on a poly(ether sulfone) (PES) matrix via the preparation process of high-temperature heat treatment and vacuum hot-pressing sintering technique. The influence of the ASF content on the morphology, thermal, mechanical, and dielectric properties of the as-fabricated aluminum silicate fiber reinforced aluminum phosphate–poly(ether sulfone) (ASF/AlPO 4 –PES) layered composite was investigated. The results reveal that the incorporation of aluminum silicate fiber/aluminum phosphate (ASF/AlPO 4 ) heat-resistant layer can significantly improve the thermal stability and mechanical performances of the PES matrix composites. Compared with the pristine PES, the ASF/AlPO 4 –PES layered composite containing 8.0 wt % ASF exhibited better high-temperature resistance properties (300 °C) and a lower thermal conductivity (0.16 W m −1 K −1 ). Furthermore, the dielectric constant and dielectric loss tangent of this PES matrix composite decreased to 2.16 and 0.007, respectively. Meanwhile, the frequency stability of the dielectric properties for the ASF/AlPO 4 –PES layered composites was remarkably enhanced with increasing ASF addition at frequencies ranging from 10 2 Hz to 5 MHz. This was attributed to the existence of microscopic pores within the ASF/AlPO 4 layer and the strong interfacial bonding between the ASF/AlPO 4 layer and the PES matrix. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45542.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 32
·45111
·
IF 1.86
Yangcheng Lu,Xiaojing Liu,Guangsheng Luo
Compared with low molecular surfactants, poly(vinyl alcohol) (PVA) could afford latexes with particular tackiness as an important property for various applications. However, until now, except for some highly reactive monomers, most of monomers including styrene seldom use PVA as protective colloid in emulsion polymerization. In this work, we used oil-soluble initiator, 2,2′-azobisisobutyronitrile, to accelerate the copolymerization of styrene and divinyl benzene in PVA protected colloids and synthesize polystyrene (PS) latex within 50 min at 70 °C successfully. The reaction system could remain stable even at the monomer-to-water ratio as high as 1:4, and the polymerization in pseudo-micelles or latex particles was always dominant. The adjustment of the size of the PS latex in the range from 70 to 100 nm was facilely achieved by changing the polymerization temperature, the addition of PVA, or the monomer-to-water ratio. This method was also exploited to synthesize poly(styrene- co -methyl methacrylate) and poly(styrene- co -4-chlorostyrene) latexes, indicating prospects in applications with the advantages of high capacity and broad applicability. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45111.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 34
·45208
·
IF 1.86
Caideng Yuan,Mengyao Wang,Haitao Li,Zhongwei Wang
Polyurethane–acrylate oligomer terminated with multiple unsaturated bonds was prepared using isophorone diisocyanate, (IPDI), methylene diphenyl diisocyanate, and polyols as monomers, using 2,2-dimethylol propionic acid as hydrophilic chain extender, together with pentaerythritol triacrylate (PETA) as end-capper. The UV-curable waterborne polyurethane–acrylate (UV-WPUA) composite emulsion was obtained by mixing the PUA oligomer with certain content of reactive diluents and then dispersing the mixture in water. The molecular structure of the polyurethane prepolymer, PUA oligomer, and UV-cured polymer was investigated by Fourier transform infrared spectroscopy. The influence of the composition and content of the diluents and end-capper on UV-WPUA properties, including the emulsion stability, thermal property, water resistance, adhesion, hardness, glossiness of polymer film were studied. The results show that the WPUA emulsion has excellent stability, and the UV-cured film features good hardness and remarkable water resistance when PETA is used as end-capper and the end-capping ratio of the polyurethane prepolymer is 70% and dipentaerythritol hexaacylate/dipropylene glycol diacrylate (mass ratio 1:1) is used as diluent. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45208.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 134
·期 21
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IF 1.86
Jingqi Ji,Yangchuan Ke,Yang Pei,Guoliang Zhang
In this study, exfoliated montmorillonite (MMT) nanolayers were successfully encapsulated in acrylamide/acrylic acid/2-acrylamido-2-methylpropanesulfonic acid (AM/AA/AMPS) terpolymer microspheres by in situ inverse suspension polymerization with the aid of the organic intercalation modification and the lateral groups of terpolymer chains. The introduction of well-dispersed MMT nanolayers reveals a significant enhancement of the comprehensive properties of these nanocomposite microspheres, such as the viscoelasticity, thermal stability, and plugging ability. Compared with the pure terpolymer, the elastic modulus ( G ′) of terpolymer/2.0 wt % O-MMT nanocomposites is 4.30 times higher and the decomposition temperature of these nanocomposites increases by 40 °C. The plugging rate reaches as high as 86.6%. Besides, surface morphology, swelling degree, and wetting behavior can be effectively tuned by varying the content of exfoliated MMT. The wetting angle increases to 82.0 ° which is suitable for modifying the formation channels. These selected nanocomposite microspheres can effectively enter and plug the high permeable microchannels. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44894.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 134
·期 20
·
IF 1.86
Wei Qian,Chunhui Shen,Shanjun Gao,Jingluan Xiang
Phosphonic acid functionalized siloxane crosslinked with 3-glycidoxypropyltrimethoxysilane (GPTMS) grafted polybenzimidazole (PBI) membranes are prepared by sol–gel process. The structure of the membranes is characterized by Fourier-transform infrared spectroscopy and X-ray diffraction spectroscopy. SEM images of the membranes show that the membranes are homogeneous and compact. The crosslinked membranes exhibit excellent thermal stability, chemical stability and mechanical property. The proton conductivity of the crosslinked membranes increases by an order of magnitude over range of 20 °C to 160 °C under anhydrous condition, which can reach 3.15 × 10 −2 S cm −1 at 160 °C under anhydrous condition. The activation energy of proton conductivity for membranes decreases with increase of PBI, because the formation of hydrogen bond network between the phosphonic acid and the imidazole ring can enhance the continuity of hydrogen bond in the membrane. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44818.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 134
·期 20
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IF 1.86
Zhou Zhu,Wanli Kang,Bauyrzhan Sarsenbekuly,Hongbin Yang,Caili Dai,Runmei Yang,Haiming Fan
An amphiphilic polymer with twin-tailed hydrophobic groups was prepared by micellar polymerization of acrylamide as hydrophilic monomers, 2-acryloylamino-2-methyl-1-propanesulfonic acid as functional monomers and N , N -dodecyl acrylamide as hydrophobic monomers. Using the same method, containing single-tailed hydrophobic group of the amphiphilic polymer and not containing the hydrophobic group of ordinary polymer were prepared. The molecular structure of the product was characterized by infrared spectrum and 1 H nuclear magnetism resonance spectrum. By inclusion complexation of β-cyclodextrin (β-CD), the hydrophobic association on the apparent viscosity contribution rate was studied. Relationship between hydrophobic group structure and its performance was investigated by the rotational viscometer, scanning electron microscopy (SEM), fluorescence spectroscopy, and rheometer. The results showed that amphiphilic polymers containing twin-tailed hydrophobic groups had a lower critical aggregation concentration (CAC). When the amphiphilic polymer concentration was higher than CAC, hydrophobic association was stronger, which led to a higher apparent viscosity contribution rate. At the same polymer solution concentration, amphiphilic polymer containing twin-tailed hydrophobic group had better performance on temperature resistance, salt tolerance, and mechanical shear resistance compared with the other two polymers. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44744.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 133
·期 26
·
IF 1.866
Yanping Wu,Yang Zhou,Jinlong Li,Huidi Zhou,Haichao Zhao,Jianmin Chen
Development of structure–properties relationships between the fillers/rubber matrix interface chemistry and the dispersion and interfacial adhesion properties of the rubber composites is critical to predict their bulk mechanical and tribological properties. In this paper, three solution styrene butadiene rubber (SSBR) composites containing various fillers with tailored interfacial chemistry were prepared via conventional mixing technique. Subsequently, thermal and structural features of filled SSBR composites were monitored by TG, DSC, XRD, XPS, FESEM and TEM, respectively. Sliding contact experiments were conducted to study tribological properties of styrene butadiene rubber composites under dry and wet conditions. It was shown that the SSBR filled with silicon dioxide nanoparticles significantly reduced both the friction coefficient and the wear against marble block. On the contrary, it exhibited an increased friction coefficient and wear under wet friction conditions due to the specific superior wet-skid resistance of silicon dioxide nanopartilce filled rubber composites, a good dispersion of silicon dioxide nanopartilce in the rubber matrix and strong interfacial adhesion between nanoparticles and rubber matrix. In addition, the influence of fillers dispersion and interfacial adhesion on friction and wear of styrene butadiene rubber composites was evaluated employing theoretical calculation, and the predicted results were in agreement with the experimental observations. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43589.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 133
·期 26
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IF 1.866
Dandan Xu,Keying Zhu,Xiaoting Zheng,Ru Xiao
High flux PP/EVOH nanofibrous composite microfiltration membrane (P/E-NCMM) based on polypropylene (PP) (575 nm) and polyethylene- co -polyvinyl alcohol (EVOH) nanofibers (248 nm) with low operation pressure for liquid filtration was fabricated by melt blending extrusion. PP nanofibers as the scaffold played a supporting role, and EVOH nanofibers filled in the PP nanofibers network structure narrowed the pore size and improved the wettability. Taking advantages of PP and EVOH nanofibers, the nanofibrous composite membrane created fascinating features for liquid filtration. The experimental results showed that the P/E-NCMM had high average pure water flux at low operating pressure. The P/E-NCMM with 30 wt % PP nanofibers showed high water flux [450.9 L/(m 2 h)] even at very low feeding pressure (0.05 MPa) with above 95% retention for TiO 2 suspension. The results indicated that the P/E-NCMM prepared by this method had great potential for the application in liquid filtration. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43585.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 133
·期 25
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IF 1.866
Dong Lin,Qin Zhao,Miaomiao Yan
In order to improve the hydrophilicity of polydimethylsiloxane (PDMS) microfluidic chips, a series of polyamidoamine (PAMAM) dendrimers were grafted onto the PDMS pretreated by oxygen plasma and silanized with γ-glycidoxypropyltrimethoxysilane (γ-GPS). Fourier transformed infrared absorption by total attenuated reflection (ATR-FTIR) and scanning electronic microscopy (SEM) showed that PAMAM dendrimers had been grafted on the PDMS surface and a dense and uniform coating was generated. The contact angle decreased from 108.1° to 31.8° compared with the unmodified PDMS, which indicated that the hydrophilicity of PDMS improved markedly. In the modified PDMS microfluidic chips, the EOF reduced obviously and the nonspecific adsorption between the amino acids and the microchannel surface was prevented effectively. The separation efficiency of arginine and phenylalanine were as high as 7.34 × 10 4 plates/m and 8.61 × 10 4 plates/m, respectively, and the resolution ( R S ) was 4.41. Furthermore, the reproducibility of modified chips was also very excellent, which suggested they had good stability and long service life. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43580.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 133
·期 25
·
IF 1.866
Meixiang Lv,Chunfeng Yao,Dingqiao Yang,Heping Zeng
The halogen-free flame retardance of natural fiber is an everlasting challenge due to the well-known poor solubility of phosphazene in water. In this case, a new cyclotriphosphazene derivative (MCP) was synthesized. It was etherized hexamethylolmelamine (HMMM) and hexachloro-cyclotriphosphazene (HCCP) by one pot reaction. It was characterized by 1 H NMR, 13 C NMR, 31 P NMR, FT-IR, TGA, SEM, limited oxygen index (LOI) and vertical flame testing. The MCP has good solubility in water and thermosetting MCP has compact structure which can expand several times after burning. Cotton gauze was soaked in six different concentration of aqueous solutions of MCP (0 wt %, 5 wt %, 10 wt %, 15 wt %, 20 wt % and 25 wt %, respectively) to obtain the flame retardant cloth. The cloth was soaked in 20 wt % MCP solution had higher char yield and LOI. They had no any afterflame and afterglow, and gauze 2- gauze 5 cannot be burned out in 12s ignition time. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43555.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 133
·期 24
·
IF 1.866
Xiaoyan Zhou,Anhua Lin,Xinxin Yuan,Hui Li,Dong Ma,Wei Xue
For insulin delivery, many reported glucose-sensitive materials are designed to response to the glucose in the blood. However, few particular studies on their blood compatibility have been reported. In this article, for controlled insulin release in diabetes therapy, a glucose-sensitive nanogel was prepared through thermally initiated precipitation polymerization using the aminophenylboronic acid-containing monomer to copolymerize with methacrylic acid. The obtained nanogels showed the uniform and spheroidal morphology as observed by SEM, and their sizes in aqueous solution are dependent on the concentration of glucose. Through in vitro and in vivo insulin release tests, it was found that nanogels showed the glucose-dependent insulin release and prolonged effect of lowing blood glucose level. The blood compatibility of nanogels has also been explored through various assays including the hemolysis, activated partial thromboplastin time, prothrombin time as well as the thromboelastography. All results indicated that the obtained glucose-sensitive nanogels showed good blood safety. Moreover, their low cytotoxicity suggested a potential application in diabetes therapy. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43504.
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高影响因子
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