JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 134
·期 8
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IF 1.866
Zhe Yu,Ying Zhang,Zi Jian Gao,Xiu Yan Ren,Guang Hui Gao
In this investigation, polyacrylamide (PAAm) as the flexible network is introduced to enhance the mechanical strength of hyaluronic acid–gelatin (HA–Gel) hydrogels by interpenetrating polymer network (IPN). The structure, mechanical property, and rheology property of the IPN hydrogels are investigated. It is found that the compressive strength of the HA–Gel/PAAm IPN hydrogels has increased five times higher than that of HA–Gel hydrogels. Rheological test demonstrates that elastic moduli (G′) and viscous moduli (G″) of HA–Gel/PAAm IPN hydrogels increase 100 times higher than those of HA–Gel hydrogels. Moreover, the HA–Gel hydrogels are fractured under the low compressive stress, whereas HA–Gel/PAAm IPN hydrogels are not broken under the high compressive stress. It is envisioned that the IPN hydrogels will be an effective approach to enhance the mechanical strength and broaden the range of hydrogels' applications. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44503.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 134
·期 8
·
IF 1.866
Jianwei Li,Guangcheng Zhang,Qi Zhu,Jiantong Li,Hongming Zhang,Zhanxin Jing
In this research, a series of porous copolyimide (co-PI) films containing trifluoromethyl group (CF 3 ) were facilely prepared via a phase separation process. The co-PI were synthesized by the reaction of benzophenone-3,3′,4,4′-tetracarboxylic dianhydride (BTDA) with two diamines of 4,4′-diaminodiphenyl ether (ODA) and 3-trifluoromethyl-4,4'-diaminodiphenyl ether (FODA) with various molar ratios. The flexible and tough porous co-PI films with about 300 μm thickness and 8∼10 μm average diameter could be obtained by solution casting conveniently. The thermal properties of the obtained porous co-PI films were excellent with a glass transition temperature at 270 °C ∼ 280 °C and only 5% weight loss in temperature from 530 °C to 560 °C under nitrogen atmosphere. In addition, the dielectric and hydrophobic properties of porous co-PI films were remarkably improved owing to the presence of trifluoromethyl groups (CF 3 ) in the polymer chains. Moreover, our synthesized porous co-PI films also showed good mechanical properties. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44494.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 134
·期 7
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IF 1.866
Jie-Ping Fan,Dan-Dan Liao,Yan-Long Xie,Bing Zheng,Jia-Xin Yu,Ya-Hui Cao,Xue-Hong Zhang,Hai-Long Peng
A composite material (MIP@Fe 3 O 4 @GO) based on molecular imprinted polymer (MIP), superparamagnetic Fe 3 O 4 particles and graphene oxide (GO) was prepared by the chemical coprecipitation method, and used to simultaneously separate and enrich two alkaloids (evodiamine and rutaecarpine) in the extract of Evodiae fructus . The as-prepared MIP@Fe 3 O 4 @GO was characterized by Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), and vibrating sample magnetometer (VSM). The adsorption kinetics, isotherms, competitive adsorption, and reusability of MIP@Fe 3 O 4 @GO were also investigated. The results revealed that MIP@Fe 3 O 4 @GO was sensitive to the magnetic field and could be easily separated using an external magnet; MIP@Fe 3 O 4 @GO showed good recognition selectivity, as well as simultaneous enrichment and separation abilities for evodiamine and rutaecarpine in the extract of E. fructus with satisfactory recoveries. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44465.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 134
·期 7
·
IF 1.866
Hua Mei,Ran Wang,Wentan Ren,Yong Zhang
A novel organic–inorganic hybrid of epoxycyclohexyl polyhedral oligomeric silsesquioxane (e-POSS)–grafted carboxylic methoxypolyethylene glycols (mPEG-COOH), that is, a POSS-mPEG graftomer, was synthesized. The grafting reaction of e-POSS and mPEG-COOH was characterized by Fourier transform infrared (FTIR) and 1 H-NMR spectroscopy. Then the graftomer was used to develop new composite solid polymer electrolyte (SPE) films with a carboxylated nitrile rubber–epoxidized natural rubber (XNBR-ENR) self-crosslinked blend system as a dual-phase polymer matrix. The self-crosslinked reaction of the XNBR-ENR matrix was investigated using ATR-FTIR. The morphology of the SPE films and the distribution of lithium salt were investigated using field emission scanning electron microscopy and X-ray diffraction, and the result illustrated that the addition of POSS-mPEG could promote and accelerate the dissociation of LiClO 4 . The best effect within the range of this study was achieved when 25 phr POSS-mPEG was involved. The differential scanning calorimetry analysis proved that the glass-transition temperature of the composite SPE films was reduced with the increase of POSS-mPEG. The ionic conductivity of the composite SPE films was investigated by electrochemical impedance spectroscopy. The highest ionic conductivity in this study of 2.57 × 10 −5 S cm −1 was obtained with 25 phr POSS-mPEG loading. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44460.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 134
·期 5
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IF 1.866
Yijian Wu,Baoqing Shentu,Zhixue Weng
The SEBS/PP thermoplastic vulcanizates (TPVs) were prepared by melt blending. Di- tert -butyl peroxide (DTBP) was used as the curing agent in combination with trimethylopropane trimethacrylate (TMPTMA) and poly(styrene- b -butadiene-bstyrene) (SBS) as the coagents for the curing process. The synergistic effect of TMPTMA and SBS on the structure and properties of TPVs was studied by means of FT-IR, DSC, torque rheometer, and universal testing machine. Both SEBS and PP crosslinked and the network structure formed under the participation of TMPTMA and SBS. Compared with the sole addition of the coagent, simultaneous loading of both TMPTMA and SBS could provide the TPVs with better solvent-resistance and excellent mechanical properties. The crosslinking mechanism of the TPVs was also proposed. The slight lower value of T m for the TPVs indicated the improved miscibility between PP and SEBS due to the crosslinking reaction. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44392.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 134
·期 5
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IF 1.866
Ming Ye,Nianqing Zhu,Xiaojie Li,Zhongbin Ni,Zhuowei Qiu,Mingqing Chen
A novel monofunctional compatibilizer (OID) was prepared and used as compatibilizer for fabrication of wood-plastic composites. OID was successfully synthesized by esterification reaction of isophorone diisocyanate and octadecanol as confirmed by Fourier transform-infrared spectra. After OID modification, the hydrophobicity of wood flour surface was enhanced as indicated by the increase of surface water contact angle. By using OID as compatibilizer, an obvious enhancement of the interfacial adhesion between wood flour and polyolefin was observed by scanning electron microscopy. As a result, the tensile properties of the obtained polypropylene/wood flour composites and polyethylene/wood flour composites were significantly enhanced. Besides, the processability of polyolefin/wood flour composites was also improved by adding OID. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44429.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 134
·期 6
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IF 1.866
Guang Chai,Dongcheng Sun
A new reactive polyurethane/polyacrylate (PU/PA) blend was developed by mixing a core–shell polyacrylate latex containing keto groups in shell layer and a polyurethane dispersion incorporating multiple hydrazide groups which was synthesized by introducing the poly-hydrazide groups into the end of the vinyl-terminated polyurethane chains. Fourier transform infrared (FTIR) spectroscopy and gel permeation chromatography (GPC) results indicated that poly-hydrazide groups had been incorporated in the polyurethane chains. Transmission electron microscopy (TEM) micrograph revealed that polyacrylate particles had a clear core–shell structure. The results of FTIR, scanning electron microscopy (SEM), and differential scanning calorimetry (DSC) indicated that the crosslinking reaction between two polymer systems had happened and crosslinking structure could effectively improve the compatibility between PA and PU. Thermogravimetric analysis (TGA) and mechanical tests results suggested that crosslinking structure could enhance the thermal stability and mechanical properties of blends. The influence of the PA content and the n( CO )/n( NHNH 2 ) ratio on the hardness, water resistance, solvent resistance, and gel fraction of the blend films were comprehensively studied. The optimal PA content and n( CO )/n( NHNH 2 ) ratio was 30% and 1.5:1 in this experiment, respectively. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44443.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 134
·期 5
·
IF 1.866
Jinbo Jin,Kaizhou Zhang,Xilan Du,Jingkui Yang
Membrane fouling remains a major barrier to membrane separation, particularly obvious in polymer membranes. Dopamine (DA) is of great value as a precursor for conjugation hydrophilic molecules. In this study, PP hollow fibrous membranes were first modified by DA to form a layer of polydopamine (PDA) coating. Then taurine and glycidol were introduced respectively with assisted by PDA reactive layer, the prepared membranes corresponding to PP-T and PP-G membranes, respectively. PP and the modified PP membranes were confirmed by a thorough membrane characterization of ATR-FTIR, XPS, and FESEM measurements. The hydrophilic properties and permeability were measured by water contact angle (WCA) and permeation flux test. BSA was used to as model protein to evaluate the antifouling properties of the membranes. The results showed that taurine and glycidol were successfully introduced onto the membrane surface. The WCA of PP-T and PP-G membranes can be reduced to 32° and 26°, and the flux recovery ratio increased around 90.6% and 89.8%, respectively. Based on the experimental results, taurine and glycidol effectively improved the hydrophilic and anti-fouling performance of PP membrane. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44430.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 134
·期 25
·
IF 1.86
Yanping Wu,Lei Chen,Songlv Qin,Jinlong Li,Huidi Zhou,Jianmin Chen
A functionalized graphene, fluorinated graphene nanosheets (FGS), and SiO 2 nanoparticles as reinforcing fillers were employed to improve the mechanical properties of the solution styrene butadiene and butadiene rubber composites (SSBR-BR). The results showed that the mechanical properties of SSBR-BR composite filled with FGS were substantially improved than those of the unfilled and equivalent filler loaded graphene oxide (GO) and reduced graphene oxide (rGO) filled SSBR-BR composites. It can be ascribed to the fact that the hydrophobic surface of FGS can be endowed the good dispersion in rubber matrix and stronger interfacial interaction between rubber and fillers. The tribological properties of these composites are also investigated. The results reveal that incorporation of GO, rGO, and FGS in SSBR-BR composites can decrease antiwear properties because the existence of layered graphene promotes to tear and peel off. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44970.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 134
·期 25
·
IF 1.86
Linlin Wang,Yuelong Liu,Gousheng Liu
Hydrophobic mica particles were prepared by piranha solution activation, silanization, and copolymerization with acrylate monomers. Its surface morphology, hydrophilic properties, and thermogravimetric analysis changed differently in comparison with those of pristine mica. Scanning electron microscopy (SEM) showed that the modified (001) mica surface changed from flat to coarse. Thermogravimetric curves demonstrated that silane coupling agents and the grafted polymer were anchored on the modified-mica surface. The alternating surface polarity state was verified by different dispersion performances in the solvents. SEM images showed that the polypropylene (PP)/modified-mica composites had a better quality compatibility than the PP/untreated-mica composites. The PP/polymer-grafted-mica composites had improved mechanical properties, including stretching, tension, and impact properties. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44985.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 134
·期 25
·
IF 1.86
Yangben Cai,Zhouying Yue,Shiai Xu
A novel functional graphene with high ion exchange capacity (IEC) was prepared by grafting reaction induced by 60 Co γ-ray irradiation using graphene oxide. Then, polybenzimidazole/radiation grafting graphene oxide (PBI/RGO) composite membranes were prepared by the solution-casting method and doped with phosphoric acid (PA) to improve their proton conductivity. The properties of PBI/GO/PA and PBI/RGO/PA membranes including the PA doping level, chemical stability, proton conductivity and mechanical properties were evaluated and compared. The tensile strength of PBI/RGO/PA membranes (ranging from 27.3 to 38.5 MPa) increases at first and then decreases with the increase of the RGO content, and is significantly higher than that of other PA doped PBI-based membranes. The proton conductivity of PBI/RGO-3/PA membrane is 28.0 mS cm −1 at 170 °C without humidity, with an increase of 72.0% compared with that of PBI/PA membrane. These results suggest that PBI/RGO/PA membranes have the potential to be used as high-temperature proton exchange membranes. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44986.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 134
·期 24
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IF 1.86
Weiwang Chen,Wenguo Weng,Ming Fu
Fatty acid mixed esters (i.e., HPCMEs) with the onset phase change temperature around 32 °C were successfully synthesized by grafting palmitic-stearic binary acids (PA-SA) onto hydroxypropyl cellulose (HPC). The effects of reaction time, reaction temperature, initial ratio of reactants, and stirring speed on grafting ratio (GR) were explored. Characterizations by FTIR, 1 H NMR, DSC, and TGA were also performed to investigate their structure, thermal storage, and decomposition behavior. The results reveal that the prepared HPCMEs as thermoplastic copolymers exhibit high enthalpies, good repeatability, and enhanced thermal resistance properties. With the introduction of HPC rigid skeletons, gradual volatilization of fatty acids during use is well solved. The prepared HPCMEs thus are expected to have wide prospects for thermal energy storage owing to their proper phase change temperatures and excellent integrated performance. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44949.
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高影响因子
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