JOURNAL OF APPLIED POLYMER SCIENCE
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2024
·
IF 2.7
Yuekai Huang,Zhixian Dong,Mali Wu,Caihong Lei
Responsive hydrogels hold great promise for applications such as biological tissue engineering, controlled drug release, soft actuators, and intelligent sensors. However, the design and construction of robust responsive hydrogels using a simple method remains a significant challenge. Herein, a non-covalently crosslinked responsive hydrogel was constructed by introducing carboxyl-Zr 4+ metal coordination to the hydrophobic association network of P(AA- co -LMA) hydrogel through a facile one-pot polymerization method. The incorporation of multiple reversible interactions, including hydrogen bonding, metal coordination, and hydrophobic association, resulted in a responsive hydrogel with exceptional mechanical strength (≈2.92 MPa), outstanding flexibility (elongation>1000%), and rapid response to pH alterations. Furthermore, the hydrogel also presented good ionic conductivity due to the abundant movable ions, as well as high sensitivity and stability. As application demonstrations, the supermolecular hydrogel had been successfully used in actuating and strain sensing. This work establishes an effective design strategy for creating tough and multifunctional responsive hydrogel.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 128
·期 6
·3925-3932
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IF 1.289
Shenghua Lv,Haobo Ju,Chaochao Qiu,Yujuan Ma,Qingfang Zhou
Preparation and characterization of polycarboxylate superplasticizers of IPCs ( copolymer of itaconic acid and allyl polyoxyethylene ether) and MPCs (copolymer of maleic anhydride and allyl polyoxyethylene ether) are shown. The difference between IPCs and MPCs is that half of the carboxyl groups of IPCs indirectly connect to the main chains through methylene. The effects of the carboxyl group-main chain connection mode on the properties of IPCs and MPCs were investigated by assessing the paste fluidity and the pore diameters and compressive strength. The interaction between IPCs (MPCs) and cement were revealed by zeta-potential and the adsorption amount. The results indicated that the indirect connection mode favorably improved paste fluidity, decreased pore diameters, and increased the compressive strength compared with the direct connection mode. This is likely because that when carboxyl groups are connected to the main chains indirectly, more moving space allows easier adsorption on cement particles. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 128
·期 6
·3678-3686
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IF 1.289
Wanjun Tang,Xuewen Chen,Yingping Zou,Bo Liu,Hong Zhong,Chunyue Pan
A series of new 5,6-bis(tetradecyloxy)-2,1,3-benzoselenadiazole-based copolymers ( PBDT-DTBSe, PC-DTBSe , and PF-DTBSe) have been first synthesized by Stille or Suzuki coupling polymerization reaction. The synthesized copolymers show good solubility in common organic solvents, such as chloroform, tetrahydrofuran, and chlorobenzene with excellent film-forming properties. The molecular weight was determined by gel permeation chromatography and the thermal properties were investigated by thermogravimetric analysis. All the copolymers exhibited broad absorption from 350 to 700 nm. The preliminary results showed the device based on the structure of indium tin oxide/PEDOT : PSS/ PC-DTBSe : PC 61 BM (1 : 2, w/w)/Ca/Al displayed the best photovoltaic performance with a power conversion efficiency of 1.35%, a V oc of 0.87 V, a J sc of 3.84 mA/cm 2 and a fill factor of 40.4%, under illumination of AM 1.5 G (100 mW/cm 2 ). © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 128
·期 5
·3141-3148
·
IF 1.289
Changdao Mu,Xinying Li,Yige Zhao,Hanguang Zhang,Liangjie Wang,Defu Li
Freezing/thawing is used as a new method to elaborate exfoliated gelatin-Montmorillonite (MMT) bionanocomposites. The data of X-ray diffraction and transmission electron microscopy indicate that freezing/thawing is an effective approach to exfoliate the clay for concentrations higher than 5 mass% in gelatin matrix. In addition, after freezing/thawing process to introduce, the crystallinity (triple-helix content) of gelatin-MMT bionanocomposites is improved, revealing that freezing/thawing method has the advantages for gelatin molecules to renature into triple-helix. Specially, the data of Fourier transform infrared indicate that freezing/thawing may be induce more hydrogen bond interactions in gelatin-MMT bionanocomposites due to the better dispersion of MMT. The mechanical measurements and thermogravimetric analysis show that gelatin-MMT bionanocomposites prepared by freezing/thawing display enhanced mechanical properties and thermal stability in comparison with the ones prepared by conventional blending at the same clay content. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 128
·期 6
·4261-4270
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IF 1.289
Wensong Han,Baoping Lin,Hong Yang,Xueqin Zhang
First, the second-generation hyperbranched poly(amine-ester) (G2-OH) was successfully prepared by thiol-ene “click” chemistry. Subsequently, a series of photosensitive hyperbranched oligomers (G2-ORs) were synthesized by facile modifications of the G2-OH with acryloyl chloride, methacryloyl chloride, IPDI-HEA, and IPDI-HEMA, respectively. The structures of hyperbranched oligomers were characterized by element analysis, FT-IR, 1 H NMR, GPC and viscosity measurement. It was shown that these synthesized oligomers have narrow molecular weight distribution and low intrinsic viscosity at 30°C. UV–vis spectra results showed that the G2-ORs had sharp absorption bands at around 202 nm. The results of photosensitivities measurement indicated that the G2-Macr shows the highest photosensitive than other hyperbranched oligomers in the absence of photoinitiator. In addition, these UV-cured photosensitive G2-ORs had good thermal properties. The solubilities of the synthesized hyperbranched oligomers were also examined. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 128
·期 6
·3846-3852
·
IF 1.289
Hong Zhou,Yeping Xu,Hongwu Tong,Yuxin Liu,Fang Han,Xiangyang Yan,Shaomin Liu
Molecularly imprinted polymers (MIP) with high performance in selectively recognizing bisphenol A (BPA) were prepared by using a novel and facile surface molecular-imprinting technique. Vinyl-functionalized, monodispersed silica spheres were synthesized by a one-step emulsion reaction in aqueous solution. Then, BPA surface molecularly imprinted polymers (SMIP) were prepared by polymerization with 4-vinylpyridine as the functional monomer and ethylene glycol dimethacrylate as the crosslinker. Maximal sorption capacity ( Q max ) of the resulting SMIP was up to 600 μmol g −1 , while that of nonimprinted polymers was only 314.68 μmol g −1 . Kinetic binding study showed that sorption capacity reached 70% of Q max in 20 min and sorption equilibrium at 80 min. SMIP had excellent accessibility and affinity toward BPA, for the selectivity coefficients of SMIP for BPA in respect to phenol, p-tert -butylphenol, and o -phenylphenol were 3.39, 3.35, and 3.02, respectively. The reusage process verified the SMIP owning admirably stable adsorption capacity toward BPA for eight times. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 128
·期 5
·2817-2822
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IF 1.289
Guixiang Zhu,Ying Wang,Weipu Zhu,Kui Zhu,Xiaoyan Xu,Zhiquan Shen
In this article, we report the facile one-pot synthesis of poly(decamethylene succinate) (PDS) with multiple hydroxyl groups by direct polycondensation with malic acid (MA) as the functional monomer and dysprosium triflate as the chemoselective catalyst at 80°C. The secondary hydroxyl groups of malic units were inactive during the polycondensation process. The density of hydroxyl groups of the copolymer could be well-controlled by the molar ratio of succinic acid and MA in the feed. These hydroxylated PDSs were grafted by poly(ethylene glycol) (PEG) through a simple esterification reaction; this resulted in amphiphilic PDS- g -PEG copolymers, which could undergo micellization in aqueous media to form nanosized aggregates with diverse morphologies and diameters. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 128
·期 2
·1095-1100
·
IF 1.289
Mengzhu Liu,Zhiqiang Cheng,Juntao Yan,Linhui Qiang,Xin Ru,Fei Liu,Dawei Ding,Junfeng Li
A simple procedure is reported for the fabrication of TiO 2 nanofibers via electrospinning technique using polylactic acid (PLA), tetrabutyl titanate, and hexafluoroisopropanol as a spinning solution. TiO 2 nanofibers (600–700 nm in diameter), with bundled nanofibrils align in the fiber direction, are obtained from the calcination of the as-spun TiO 2 /PLA composite nanofibers at 550°C. The structure and physicochemical property of generated nanofibers are elucidated by Fourier transform-Infrared radiation spectrometer, X-ray diffraction, scanning electron microscope, and Thermogravimetric-differential thermal analysis, respectively. The photocatalytical activity of the TiO 2 nanofibers is testified by quantifying the degradation of methylene orange. The result indicates that the TiO 2 nanofibers with pure anatase phase, which are prepared at 550°C, shows an excellent photocatalytic activity. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 128
·期 3
·2152-2161
·
IF 1.289
Qiheng Tang,Jiyu He,Rongjie Yang,Qingsong Ai
Reactive hot-melt polyurethane adhesive (RHMPA) is moisture-curing polyurethane (PU) adhesive whose main component is an isocyanate-terminated PU prepolymer that can be cured after application by reaction with ambient moisture. Two series of RHMP-containing poly(tetramethylene glycol) (PTMG) of different molecular weights and different degrees of polymerization of the hard segment have been successfully synthesized using a two-step bulk polymerization with 4,4′-diphenylmethane diisocyanate, PTMG, and 1,4-butanediol (1,4-BDO). The structure and basic properties of the RHMPA film have also been characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis, differential scanning calorimetry, dynamic mechanical analysis, atomic force microscopy, gel permeation chromatography (GPC), shore hardness ( A / D ), and tensile tests. The results show that the initial decomposition temperature is more than 250°C, and the tensile strength of the RHMPA film was greater than 15 MPa. The adhesive performance of the RHMPA with different hard-segment content was studied through studies of the single lap-shear strength and tensile strength of butt joints. The results show a general trend of the bonding strength increases with the hard-segment content at 25°C. The adhesive performance of RHMPA in different environments was also investigated. It was found that the RHMPA exhibited excellent bonding strength to thermoplastic polyurethane elastomer (TPU) when placed in the fridge at −20°C, hot water at 80°C, 1 M HCl solution (acid) at 25°C, and 1 M NaOH solution (alkaline) at 25°C for 10 h. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 127
·期 5
·3749-3759
·
IF 1.289
Yajing Wang,Jiu Wang,Liang Ge,Qi Liu,Liqun Jiang,Jiabi Zhu,Jianping Zhou,Fei Xiong
In this study, a series of chitosan-graft-poly( N -isopropylacrylamide) (CTS- g -PNIPAAm) copolymers based on different molecular weight (Mw) of CTS and NIPAAm were synthesized through the polymerization of NIPAAm in an acid aqueous solution. The structures were verified by Fourier transform infrared and nuclear magnetic resonance. The influence of the CTS Mw on the properties of the resulting copolymers and self-assembled nanoparticles was fully examined. The grafting ratio and grafting efficiency of the copolymers increased with the CTS Mw. All the copolymers have a similar low critical solution temperature of 33.5°C, which was independent of the CTS Mw. Furthermore, the copolymers were less temperature sensitive, when CTS Mw increased to 200 kDa. Besides, once the CTS Mw increased to 700 kDa, the copolymers were less pH sensitive near the tumor site (from pH 7.4 to 6.8). The copolymers could form uniform nanoparticles once the temperature increased to 34°C, which was reversible. After crosslinking by N , N -methylenebisacrylamide (MBA), structurally stable nanoparticles could be obtained. The results from Transmission electron microscope (TEM) and Atomic force microscopy (AFM) showed that the MBA crosslinked nanoparticles were uniformly spherical with a loose structure. Surface tension method indicated that the critical aggregate concentrations were 0.045, 0.042, 0.037, and 0.036 mg mL −1 prepared from CTS 50, 100, 200, and 700 kDa, respectively. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 127
·期 4
·3204-3212
·
IF 1.289
Hu Liu,Baosong Fu,Qianqian Shang,Guomin Xiao
In this study, vinyl-group modified nanosilicas (mSiO 2 ) were prepared via sol–gel method using vinyltriethoxysilane (VTES) as modifier first, then the novel poly(hydroxylic fluoroacrylate)/mSiO 2 nanocomposite was successfully synthesized by in situ solution polymerization of mSiO 2 with dodecafluoroheptyl methacrylate (DFHMA), β-hydroxyethyl methacrylate (HEMA), methyl methacrylate (MMA), and butyl acrylate (BA) initiated by 2,2-azobisisobutyronitrile (AIBN) in the co-solvents of ethyl acetate and butyl acetate. The chemical composition and structure of the nanocomposite were characterized by Fourier transform infrared spectrometry (FTIR) and transmission electron microscopy (TEM). TEM observation indicated that mSiO 2 nanoparticles obtained a well dispersion in polymeric matrix. Thermogravimetric analysis (TGA) studies revealed that the temperature corresponding to 50% weight loss of the nanocomposite was improved by 21.5°C with the addition of 2.0 wt % mSiO 2 . The synthesized nanocomposites were applied to use with hexamethylene diisocyanate trimer (HDIT) to prepare polyurethane materials. Tensile test revealed that polyurethane material with mSiO 2 content of 2.0 wt % showed an ultimate tensile strength of about 5.19 times higher than that without mSiO 2 . The polyurethane films displayed surface energy of lower than 25 mN m –1 and high light transmittance. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·
IF 1.289
Tianqiang Xu,Zhaobin Tang,Jin Zhu
In this study, a novel graft copolymer, polylactide- graft -glycidyl methacrylate (PLA–GMA), was synthesized by the grafting of glycidyl methacrylate onto the polylactide (PLA) chain via free-radical polymerization. Fourier transform infrared spectroscopy and 1 H-NMR were used to characterize the structure of the copolymer. Furthermore, PLA–GMA was used as a coupling agent to improve the interfacial adhesion between bamboo flour (BF) and PLA in PLA/BF biocomposites. The mechanical properties and crystallization behavior of the PLA/BF biocomposites were investigated. The results show that with the addition of PLA–GMA, the flexural strength and flexural modulus of the biocomposites increased significantly. The mechanical properties increased with increasing PLA–GMA amount. The PLA–GMA also enhanced the crystallization rate of PLA in the PLA/BF biocomposites. The property improvement of the biocomposites was due to enhanced interfacial adhesion between the PLA and BF. This was confirmed by scanning electron microscopy. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2012
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高影响因子
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