JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 43
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IF 1.768
Xiaoqin Chen,Zuliang Liu,Weiwei Cao,Chunyan Yong,Xiaodong Xing
A viable method for coating of cellulose fiber with quaternarized N-halamine is reported in this article. The use of quaternary ammonium salt group in combination with N-halamine group can reinforce the antibacterial activity. The chemical structure of as-synthesized N-halamine precursor 4-(Bromo-acetic acid methylester)-4-ethyl-2- oxazolidinone (BEO) was characterized by 1 H-NMR. The cellulose fibers were characterized by Fourier transform infrared spectra and X-ray photoelectron spectra. The spectra data confirmed that the quaternarized N-halamine-grafted cellulose fibers were successfully obtained. The antibacterial properties of functional fibers were challenged with both Gram positive and Gram negative bacteria. The antibacterial tests and showed that the as-prepared antibacterial cellulose fibers exhibited powerful and rapid bactericidal performance against both Gram negative E. coli and Gram positive S. aureus . © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42702.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 28
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IF 1.768
Yumeng Luo,Yafei Lu,Ning Li,Yun Li,Xiaoa Zhang,Shicheng Qi
Novel segmented carborane-containing polyurethane (PUR 2–5) is synthesized from hydroxyl-terminated carborane-containing prepolymer (P3) as soft segment and isocyanate-terminated carborane-containing prepolymer (P5) as hard segment by different ratio of P3 and P5. The prepared carborane-containing polyarylesters and polyurethanes (PURs) are characterized by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance spectroscopy (NMR). Their mechanical properties and thermal stability are measured, while the dosage of carborane biphenol is 5–10 wt %, the tensile strength is up to 20 MPa, and thermal gravimetric analyzer (TGA) curves indicate that the carborane group effectively reduces the degradation rate of carborane-containing polyurethane, which is fairly stable above 300°C and with char yield exceeding 40%. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42227.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 27
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IF 1.768
Jianming Pan,Yijie Yin,Yunlei Zhang,Runrun Wu,Xiaohui Dai,Yongsheng Yan
Thermoresponsive and magnetic molecularly imprinted polymers (TMMIPs) based on magnetic carbon nanotubes (MCNTs) were prepared and applied to the switched recognition and controlled release of 2,4,5-trichlorophenol (2,4,5-TCP) from aqueous solution. In this study, MCNTs were first synthesized via the encapsulation of Fe 3 O 4 nanoparticles into the tunnel of carbon nanotubes by a wet impregnation technology. Then, the TMMIPs were synthesized with N -isopropyl acrylamide as a thermal functional monomer by free-radical polymerization. The magnetic sensitivity and stability of the prepared materials were tested with a vibrating sample magnetometer (saturation magnetization = 1.4 emu/g) and atomic absorption spectrophotometer (in the pH range 3.0–8.0), respectively. The thermoresponsive properties of the TMMIPs were evaluated by two means, including the results of ultraviolet–visible spectroscopy and the controlled release of 2,4,5-TCP at 30 and 40°C, respectively. The effects of the pH, initial concentration, and contact time on adsorption were examined with batch mode experiments, and several other compounds were selected as model analytes to evaluate the selective recognition performance of the TMMIPs. This demonstrated that the TMMIPs had a higher affinity for 2,4,5-TCP than did the thermoresponsive and magnetic nonimprinted polymers. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42087.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 27
·
IF 1.768
Yan Zhang,Yin-wen Li,Jian Zheng,Hui-long Guo,Xiao-xiao Guan,Man-geng Lu,Kun Wu,Li-yan Liang
A novel thermal stability and highly transparent silicone resin-type material was prepared via hydrosilylation of vinyl-polyhedral oligomeric silsesquioxanes (POSS)-grafted methylhydrosilicone oil and vinylmethylsilicone oil in the presence of Karstedt catalyst. The morphology, mechanical property, thermal stability, optical transmittance, thermal-oxidation resistance of the vinyl-POSS-reinforced silicone resins were systematically investigated. Scanning electron microscopy showed that the vinyl-POSS-reinforced silicone resins had good compatibility with polydimethylsiloxane (PDMS) systems. The mechanical analysis and thermo gravimetric analysis indicated that the mechanical properties and thermal stability increased with increasing quantity of vinyl-POSS. However, the optical transmittance increased with the increasing amount of vinyl-POSS rather than decreased. In addition, the incorporation of vinyl-POSS did not improve the thermal resistance of the PDMS polymers. The product has the potential application for LED packaging. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42187.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 16
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IF 1.768
Heyi Ge,Xiaolong Ma,Huashi Liu
A modified resin was synthesized through the reaction between dodecylamine and tetraglycidyldiaminodiphenylmethane (TGDDM), which was used as the film former of sizing agent for carbon fiber (CF). The sizing agents were prepared through phase inversion emulsification method. Fourier transform infrared spectroscopy (FTIR) was utilized to analyze the modified resin. Particle sizes of the sizing agents were tested to evaluate their stabilities. Differential scanning calorimetry (DSC) results demonstrated that the glass transition temperature ( T g ) of the modified TGDDM is much higher than the T g of the cured epoxy resin E-44. The influences of the sizing treatment on CF were investigated by abrasion resistance, fluffs, and stiffness tests. The maximum abrasion resistance increased by 172.8%, compared with the abrasion resistance of the desized CF. Interlaminar shear strength (ILSS) results of the CF/TGDDM composites indicated that the interfacial adhesion between CF and matrix resin was greatly improved after CF was sized. The maximum ILSS value could obtain a 29.16% improvement, compared with the ILSS of the desized CF composite. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41882.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2013
·Vol. 130
·期 6
·4308-4317
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IF 1.395
Jintao Yang,Lingqi Huang,Yuefang Zhang,Feng Chen,Mingqiang Zhong
In this study, spherical ordered mesoporous silica (s-OMS) was applied as a new type of nucleating agent in polystyrene (PS) foaming with supercritical CO 2 as a blowing agent. These s-OMS particles were modified by the selective grafting of PS brushes on the outside surface, by which the mesoporous structure inside particles could be maintained. Transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, Fourier transform infrared spectroscopy, and Brunauer–Emmett–Teller surface area analysis were used to characterize the structure of the original and modified particles; these indicated that the PS brushes were grafted on the outside surface and the inside porous structure were maintained. PS/s-OMS–PS composites were prepared by a solution blending method, and the s-OMS–PS particles could have been well dispersed in the PS matrix because of the surface modification. Subsequently, PS and composite microcellular foams were prepared by a batch foaming process, and the morphology characterization on these foams showed that the s-OMS particles exhibited an excellent heterogeneous effect on PS foaming. The heterogeneous effect became more significant when the foaming temperature or saturation pressure was low. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 4308–4317, 2013
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JOURNAL OF APPLIED POLYMER SCIENCE
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2013
·Vol. 130
·期 6
·4137-4146
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IF 1.395
Yan-Ling Luo,Xiao-Li Yang,Feng Xu,Ya-Shao Chen,Zhuo-Ma Ren-Ting
A novel A 2 BA 2 -type thermosensitive four-armed star block copolymer, poly( N -isopropyl acrylamide) 2 - b -poly(lactic acid)- b -poly( N -isopropyl acrylamide) 2 , was synthesized by atom transfer radical polymerization and characterized by 1 H-NMR, Fourier transform infrared spectroscopy, and size exclusion chromatography. The copolymers can self-assemble into nanoscale spherical core–shell micelles. Dynamic light scattering, surface tension, and ultraviolet–visible determination revealed that the micelles had hydrodynamic diameters ( D h ) below 200 nm, critical micelle concentrations from 50 to 55 mg/L, ζ potentials from −7 to −19 mV, and cloud points (CPs) of 34–36°C, depending on the [Monomer]/[Macroinitiator] ratios. The CPs and ζ potential absolute values were slightly decreased in simulated physiological media, whereas D h increased somewhat. The hydrophobic camptothecin (CPT) was entrapped in polymer micelles to investigate the thermo-induced drug release. The stability of the CPT-loaded micelles was evaluated by changes in the CPT contents loaded in the micelles and micellar sizes. The MTT cell viability was used to validate the biocompatibility of the developed copolymer micelle aggregates. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 4137–4146, 2013
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JOURNAL OF APPLIED POLYMER SCIENCE
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2013
·Vol. 130
·期 6
·4075-4080
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IF 1.395
Weidong Zhou,Xiaowei Wang,Pingli Wang,Wei Zhang,Junhui Ji
Poly(butylene succinate- co -butylene adipate) (PBSA)/graphene oxide (GO) nanocomposites were synthesized via in situ polymerization for the first time. Atomic force microscopy demonstrated the achievement of a single layer of GO, and transmission electron microscopy proved the homogeneous distribution of GO in the PBSA matrix. Fourier transform infrared spectroscopy results showed the successful grafting of PBSA chains onto GO. With the incorporation of 1 wt % GO, the tensile strength and flexural modulus of the PBSA were enhanced by 50 and 27%, respectively. The thermal properties characterized by differential scanning calorimetry and thermogravimetric analysis showed increases in the melting temperatures, crystallization temperatures, and thermal stability. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 4075–4080, 2013
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JOURNAL OF APPLIED POLYMER SCIENCE
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2013
·Vol. 130
·期 5
·3718-3725
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IF 1.395
Yan Xia,Guang Lu Han,Qiu Gen Zhang,Yi Gong,Ian Broadwell,Qing Lin Liu
CuO-filled aminomethylated polysulfone hybrid membranes were prepared for sulfur removal from gasoline. The as-prepared membranes were characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The separation performance of the hybrid membranes was evaluated by pervaporation (PV) separation of n -heptane/thiophene binary mixture. CuO-filling leads to a decrease in permeation flux. The sulfur-enrichment factor increased first and then decreased with increasing CuO loading, and it is worth noting that there is a rebound in enrichment factor above 8 wt % CuO loading. Influencing factors such as nitrogen content, feed temperature, sulfur content, and various hydrocarbons on membrane PV performance were also evaluated. Permeation flux of 23.9 kg·μm·m − 2 ·h − 1 and sulfur-enrichment factor of 3.9 can be achieved at 4 wt % CuO loading in PV of n -heptane/thiophene binary mixture with 1500 μg·g − 1 sulfur content. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 3718–3725, 2013
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JOURNAL OF APPLIED POLYMER SCIENCE
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2013
·Vol. 130
·期 5
·3600-3610
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IF 1.395
Mengzhu Liu,Zhiqiang Cheng,Yi Jin,Xin Ru,Dawei Ding,Junfeng Li
Poly( l -lactide- co -ε-caprolactone-diOH) (PCLA) with (ABA) n type is synthesized using poly(lactic acid) (PLA) and poly(ε-caprolactone) di-OH (PCL-diOH) via chain extending method. FT-IR, 1 H-NMR, and GPC data demonstrate that PLA and PCL-diOH have reacted completely. The product is electrospun into ultrafine fibers subsequently. The optimum electrospinning parameters obtain from an orthogonal experiment are a solvent ratio (DMF/DCM) of 5/5, a polymer concentration of 28 wt %, a collector distance of 20 cm and a voltage of 18 kV. As a result, the average diameter of fibers is 0.77 µm and the uniformity is above 80%. Via range analysis, it is found that the order of the influence on diameter is solvent ratio, applied voltage, collector distance, and polymer concentration, successively. Single effect of the four governing factors on diameter and morphology is also experimentally investigated. This may provide clues for obtaining fibers with various structures by controlling the parameters. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 3600–3610, 2013
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JOURNAL OF APPLIED POLYMER SCIENCE
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2013
·Vol. 130
·期 6
·3862-3868
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IF 1.395
Ronghui Guo,Yani Li,Jianwu Lan,Shouxiang Jiang,Ting Liu,Wanqi Yan
In this study, silver nanoparticles were synthesized on cotton fabric modified with 3-aminopropyltrimethoxysilane (APTMS) using sodium citrate as a reducing/stabilizing agent by microwave-assisted process. The presence of a highly oriented amino-terminated self-assembled monolayer and formation of APTMS was demonstrated by an X-ray photoelectron spectroscopy (XPS) analysis. The silver-coated cotton fabrics were examined by scanning electron microscopy (SEM) and energy dispersive X-ray (EDX). UV protection, antistatic, and hydrophobic properties were also evaluated. The results show that silver-coated fabric modified with APTMS possesses excellent antistatic, UV protection with ultraviolet protection factor (UPF) of 396.5 and superhydrophobic properties with contact angle of 153.2°. APTMS pretreatment improves the adhesive strength between silver coatings and cotton fabric. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 3862–3868, 2013
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JOURNAL OF APPLIED POLYMER SCIENCE
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2013
·Vol. 130
·期 4
·2801-2808
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IF 1.395
Miao Yin,Li Yang,Xiu-yun Li,Han-bing Ma
The fluorinated epoxy resin, 2,2-bisphenol hexafluoropropane diglycidyl ether (DGEBHF) was synthesized through a two-step procedure, and the chemical structure was confirmed by 1 H n uclear magnetic resonance (NMR), 13 C NMR, and Fourier transform infrared (FTIR) spectra. Moreover, DGEBHF was thermally cured with methyl hexahydrophthalic anhydride (MHHPA). The results clearly indicated that the cured DGEBHF/MHHPA exhibited higher glass transition temperature ( T g 147°C) and thermal decomposition temperature at 5% weight loss ( T 5 372°C) than those ( T g 131.2°C; T 5 362°C) of diglycidyl ether of bisphenol A (DGEBA)/MHHPA. In addition, the incorporation of bis-trifluoromethyl groups led to enhanced dielectric properties with lower dielectric constant ( D k 2.93) of DGEBHF/MHHPA compared with cured DGEBA resins ( D k 3.25). The cured fluorinated epoxy resin also gave lower water absorption measured in two methods relative to its nonfluorinated counterparts. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 2801–2808, 2013
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