JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 132
·期 1
·
IF 1.64
Xiaohai Bu,Yuming Zhou,Tao Zhang,Man He,Yongjuan Wang
Serine-based monosubstituted acetylene monomers were synthesized and polymerized with rhodium zwitterion catalyst in THF to afford optically active polyacetylene derivatives (LPA and DPA) and corresponding racemic polyacetylenes (RPA) with moderate molecular weights in good yields. All of the substituted polyacetylenes (SPA) were characterized by FT-IR, NMR, GPC, UV-Vis spectroscopy, circular dichroism (CD) spectroscopy, and TGA. LPA and DPA were soluble in common organic solvents and possessed single-handed helical conformation according to their intense Cotton effect and large specific rotations, while RPA presented random coiled polymer chain. The characterization results showed that helical structure of these SPAs was stabilized by intra- and intermolecular hydrogen bonding between the substituents which played a significant role in creating and maintaining the helix. Further, the infrared emissivity properties of them at wavelength of 8 to 14 μm were investigated at room temperature. Consequently, the LPA and DPA exhibited lower infrared emissivity values than RPA, which came down to 0.632 and 0.616. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41210.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 34
·e52799
·
IF 3.057
Wei Jia,Jiang Du,Ming Jiang,Mengying Zhang,Enlin Han,Hongqing Niu,Dezhen Wu
In order to overcome the shortcomings of nanofiber membranes such as low mechanical properties and poor acid resistance, amino-rich functionalized polyimide (PI)-polyethyleneimine (PEI) fibers were successfully prepared in the study. The structure and morphology in each functionalization step were characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), static contact angle, attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), and X-ray photoelectron spectroscopy (XPS) measurements. The adsorption kinetics analysis showed that the adsorption process followed a pseudo-second-order model, and the adsorption isotherm could be described better by the Langmuir model indicating the adsorption process was mainly chemical and homogeneous monolayer adsorption. Furthermore, the maximum adsorption capacity based on the Langmuir model was about 50 mg g −1 , and the calculated thermodynamic parameters demonstrated an endothermic process. Meantime, the PEI-grafted PI fibers also exhibited good regeneration performance and stable tensile strength during recycling tests process. In the first 3 adsorption–desorption cycles, the removal efficiency and tensile strength of PI-PEI fibers could be maintained up to 60.44% and 89.29% of the initial adsorption, respectively. This work achieved the function of removing Cr (VI) by combining the excellent high temperature resistance, acid resistance, and mechanical properties of PI fibers.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 30
·50713
·
IF 3.125
Qian-Qian Gu,Cui-Liu Fu,Zhao-Yan Sun
To avoid the peeling-off of ceramic nanoparticles (NPs) from polyolefin membranes usually occurred in commercially available ceramic NPs coated polyolefin separators for lithium batteries, we propose a simple one-pot in-situ reaction method to modify commercial polyethylene (PE) separators by surface grafting 3-Aminophenol/formaldehyde (AF)/silica (SiO 2 ) composite NPs. The AF/SiO 2 composite NPs form self-supporting connected pores on the modified layer of the separator surface, which ensures the transportation of Li + . Moreover, the PE@AF/SiO 2 separators has higher electrolyte wettability and compatibility than neat PE separators attributed to the plentiful polar functional groups in the AF/SiO 2 layer and AF/SiO 2 composite NPs, resulting in higher lithium ion transference number ( = 0.62) and ionic conductivity (σ = 0.722 mS cm −1 ). More importantly, the discharge capacity, capacity retention rate and coulombic efficiency (136.2 mA h g −1 , 87.9% and 99%, respectively) after 200 cycles of Li|NMC half batteries with PE@AF/SiO 2 separators, are all more excellent than that with the pure PE separator (125 mA h g −1 , 83.1% and 85%, respectively). Our results show that the PE@AF/SiO 2 separators obtained by this modification method have higher electrochemical stability in the lithium battery system.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 128
·期 6
·3540-3547
·
IF 1.289
Hongli Yao,Xiaohui He,Lu Chen,Yiwang Chen,Defu Chen
Novel sulfonated poly(2-butoxymethylenenorbornene-co-2-(6-phenoxy-hexyloxymethylene)-5-norbornene [sP(BN/PhHN)] were prepared successfully through vinyl-addition type polymerization and then sulfonated with concentrated sulfuric acid (98%) as sulfonating agent in a component solvent. The sP(BN/PhHN)-40 with the maximal degree of sulfonation of 40% can be obtained by controlling the sulfonating reaction time from 8 to 20 h, and a proton conductivity of 3.35 × 10 −3 S/cm was achieved at 70°C. The methanol permeabilities of these membranes were in the range from 0.26 to 6.58 × 10 −7 cm 2 /s, which were remarkably lower than Nafion (2.36 × 10 −6 cm 2 /s). TEM analysis revealed that these side-chain type membranes have a microphase separated structure composed of hydrophilic side-chain domains and hydrophobic polynorbornene main chain domains. Sulfonated polynorbornene containing soft spacers displayed better properties, such as lower water uptake, high thermal properties, mechanical properties, and low methanol permeability. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 39
·
IF 1.768
Shu-Ting Liu,Ping-Ping Zhang,Kang-Kang Yan,Yuan-Hu Zhang,Ying Ye,Xue-Gang Chen
In this study, a novel -intercalated layered double hydroxide (Sb-LDH) was prepared by simultaneous recovering of LDH structures and intercalation of into LDH layers. The prepared Sb-LDH composites remain the hydrotalcite structure with layered geometry and show higher thermal property than that of LDH. When applied to poly(vinyl chloride) (PVC) composites, Sb-LDH showed limited thermal stability for PVC at the early stage of thermal and thermooxidative degradation processes. However, Sb-LDH could retard the thermal cracking of the carbonaceous conjugated polyene of PVC which may hinder further degradation, and the moderate amount of Sb-LDH (1, 2, and 5 wt %) in PVC resin can retard the process of decarbonation and enhance char formation. Sb-LDH also promoted the transparency of PVC but darkened the color. With the advantages of transparency promotion, high temperature resistance, and long-term stability, the prepared Sb-LDH is a potential thermal stabilizer for PVC resins. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42524.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 33
·e52785
·
IF 3.057
Bingjian Li,Shi Liu,Xixi Xu,Haicun Yang,Yinjie Zhou,Dan Yang,Yun Zhang,Jinchun Li
The continuously reinforced carbon nanotube woven film (CNWF) prepared via the floating catalytic chemical vapor deposition (FCCVD) was modified by mixed acid and vinyltrimethoxysilane (VTMS) respectively to obtain carbon nanotube woven film (CNWF@VTMS) grafted with CH 2 CH group. A series of novel self-supporting composite electrode materials (CNWF@VTMS/PANI) for supercapacitors were then prepared by in-situ chemical oxidative polymerization of aniline in the presence of the CNWF@VTMS film substrate as a conductive network framework. The results showed that CNWF@VTMS/PANI 14 flexible electrode with grape-clustered structure exhibited the highest specific capacitance of 531.3 F/g and the highest energy density of 26.5 Wh/kg at the current density of 1 A/g. It could maintain 75.1% of the initial value at a high current density of 10 A/g. The excellent electrochemical cycle and the structural stability have been confirmed on the condition of the higher capacitance retention of 96.6% after 2000 times of galvanostatic charge/discharge, and the almost unchanged electrochemical performances after 300 times of bending and twisting. Meanwhile, the stronger interfacial bonding between CNWF and PANI endowed a higher tensile strength of 129.2 MPa. In this article, CNWF@VTMS/PANI 14 composite electrode could be a potential application in the field of deformable supercapacitors.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 128
·期 3
·1715-1724
·
IF 1.289
Lanlan Zhai,Ruowang Liu,Feng Peng,Yunhao Zhang,Kai Zhong,Jixin Yuan,Yunjun Lan
A novel method was used to synthesis nanosilica/waterborne polyurethane (WPU) hybrids by in situ hydrolysis and condensation of tetraethyl orthosilicate (TEOS) and/or 3-aminopropyltriethoxylsilane bonding at the end of the WPU molecular chain. The hybrid was characterized by scanning electron microscopy, energy dispersive spectroscopy (EDS), transmission electron microscopy, Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The results showed that the nanosilica/WPU hybrids with well-dispersed nanosilica particles were synthesized, in which the particles had typical diameters of about 50 nm. In addition, XPS and FTIR analyses demonstrated that chemical interaction occurred between WPU and silica. The effects of TEOS on surface wettability, water resistance, mechanical strength, and thermal properties of the hybrid were also evaluated by contact angle measurements, water absorption tests, mechanical tests, and differential scanning calorimetry, respectively. An increase in advancing contact angles, water resistance, and tensile strength, as well as decrease in elongation at break and glass transition temperature, were obtained with the addition of TEOS. Water absorption decreased from 17.3 to 5.5%. The tensile strength increased to a maximum of 29.7 MPa, an increase of about 34%. Elongations at break of the hybrids decreased 191%. These results were attributed to the effects of the nanosilica and the chemical interaction between WPU and silica. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 41
·e52994
·
IF 3.057
Jing Ni,Hongchao Niu,Shiqing Lai,Chanjuan Liu,Li Zhou,Lichun Wang,Xiaohua Huang
Through one-step copolymerization of 4-(4-[1-morpholinyl]phenyl)-2,6-bis(4-aminophenyl)pyridine (MPAP), 9,9-bis(4-aminophenyl)fluorene (BAFL), and (4,4′-hexafluoroisopropylidene)diphthalic anhydride (6FDA), a series of polyimides containing morpholine group, pyridine ring, fluorene “cardo” pendant and hexafluoroisopropyl group are obtained. The synthesized polyimides have good thermal stability, high transparency, outstanding hydrophobicity and excellent solubility in not only high-boiling solvents but also low boiling-point solvents. Furthermore, polyimide films have large molecular chain spacing, which is consistent with the free volume calculated by molecular simulation. Consequently, polyimide membranes display better gas permeability values of CO 2 (up to 24.47 Barrer) and He (up to 45.04 Barrer), and good ideal gas selectivity values of CO 2 /N 2 (up to 15.33 Barrer) and He/N 2 (up to 23.89 Barrer), which also shows potential application of polyimide matrix materials in gas separation.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 137
·期 36
·49047
·
IF 2.52
Hongsheng Qi,Sawen Liu,Xiuling Chen,Chunhui Shen,Shanjun Gao
A novel mono-component intumescent flame retardant(m-IFR), called poly-(spirocyclic pentaerythritol bisphosphonate-1,3,5-triazine-O-bicyclic pentaerythritol phosphate) (PSTBP) was synthesized and characterized. PSTBP was used in polypropylene (PP) to obtain PP/PSTBP mixture whose flame retardancy, thermostability, and water resistance were studied by limiting oxygen index (LOI), vertical burning test (UL-94 V) and thermogravimetric analysis (TGA). In addition, flame-retardant mechanism of the PSTBP was investigated. The results showed that the residue of PSTBP reached 34.58% at 800°C and the volume of the PSTBP increased by dozens of times. When the content of PSTBP was 30.0 wt%, the PP/PSTBP mixture could achieve an LOI value of 32.5% and an UL-94 V-0 rating. Compared with PP/APP/PER system, PP/PSTBP mixture showed better water resistance. The TGA and Fourier transform infrared spectroscopy (FTIR) results showed that PSTBP could generate free radicals and capture the free radicals of the thermal decomposition of PP, and form a dense, strong, and thick intumescent char on the substrate, thus effectively retard the degradation and combustion of PP.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 133
·期 19
·
IF 1.866
Jiuyun Cui,Yilin Wu,Minjia Meng,Jian Lu,Chen Wang,Juan Zhao,Yongsheng Yan
Inspired from the highly bioadhesive performance of mussel protein, a simple, yet efficient synthetic method for efficiently imprinting of Artemisinin (Ars) was developed to prepare the bio-inspired molecularly imprinted membranes (MIMs) via atom transfer radical polymerization (ATRP). In this work, attributed to the unique properties of polydopamine (pDA) modified layers and ATRP technology, the uniform recognition sites for efficiently selective extraction of the Ars with high stability could be obtained on the MIMs surfaces. In addition, the maximum adsorption capacity of the MIMs is 158.85 mg g −1 by the Langmuir isotherm model, which is remarkable higher than NIMs. Additionally, because of the formation of the uniform specific recognition cavities on membrane surfaces, the as-prepared MIMs exhibited a rapid adsorption dynamics and well-fitted for the pseudo-second-order rate equation, also, possessed an excellent per-selectivity performance (β artemether/Ars values is 0.18) of template molecule, which clearly demonstrated the potential value of this method in the selective separation and purification of Ars. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43405.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 121
·期 1
·352-358
·
IF 1.24
Yang Yu,Tingli Lu,Wen Zhao,Weiguang Sun,Tao Chen
A series of biodegradable PEG-containing polyanhydrides composed of sebacic acid, 1, 6-bis( p -carboxyphenoxy) hexane, and poly (ethylene glycol) (PEG) were used as matrix material for BSA-loaded microspheres. The effects of polymer composition on the microsphere size, entrapment efficiency, in vitro degradation, and in vitro protein release were studied. Microspheres in the size range of 0.8–10 μm were fabricated via a modified double emulsion method and were characterized using scanning electron microscopy. As the content or the molecular weight of PEG was increased in the copolymer, a proportional increase was found in the particle size and the efficiency of BSA entrapment. The in vitro degradation rate of particles could be controlled by varying the polymer composition, increasing as the PEG proportion increased. In vitro release studies of BSA from polyanhydride microspheres revealed that the increased amounts of PEG within microspheres could accelerate the release rate of protein. These studies indicate that the PEG-containing polyanhydrides hold potential for protein delivery applications. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 9
·45721
·
IF 1.86
Chao Liu,Jiamei Huang,Jihong Zhu,Conghui Yuan,Birong Zeng,Guorong Chen,Yiting Xu,Lizong Dai
A novel P C N bond containing azaphosphorine, 5-(4-hydroxy)anilinomethyl-1,3-di(4-hydroxy)phenyl-1,3,5-diazaphosphorinane (ADDPP-OH), which could be used as both a cocuring agent and a flame-retarding agent for epoxy resins (EPs), was synthesized from tetrakis(hydroxymethyl)phosphonium sulfate and characterized by FTIR, 1 H-NMR, 13 C-NMR, 31 P-NMR, and so on. Compared with the pure EP, the ADDPP-OH–EP composites showed increased decomposition temperatures and char yields. When the content of ADDPP-OH was 10 wt %, the cured EP composite possessed a limiting oxygen index value of 33.7% and passed the V-0 rating of the UL-94 test. The mechanical properties of the ADDPP-OH–EP composites was improved because of the increased crosslinking density. In addition, the morphology of the residual char indicated an intumescent and multiporous structure in the inner space and a compact and continual appearance in the outer layer; this was important in preventing the materials from burning further. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45721.
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高影响因子
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