JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 127
·期 6
·4750-4755
·
IF 1.289
Congming Xiao,Cunping Xia,Yue Ma,Xuelei He
Neutral methyl cellulose (MC) was transformed into carboxylated methyl cellulose (CLMC) via the esterification reaction between MC and maleic anhydride. FTIR, X-ray diffraction, and thermogravimetry analysis results indicated the carboxyl groups were successfully incorporated onto the chains of MC. The carboxyl group percentages of CLMC ranged from 6.5 to 13.6%. CLMC and poly(vinyl alcohol) were mixed in aqueous solution, and then formed physical composite hydrogel. The equilibrium swelling ratios of the hydrogels in buffer solutions of pH 10 and 1.5 were 10.7 and 7.5, 7.7 and 6.0, 6.5 and 5.2 when the ratio of CLMC/PVA was 5 : 5, 4 : 6, and 3 : 7, respectively. The hydrogel exhibited both temperature- and pH-sensitive swelling properties, which implied not only the inherent temperature sensitive property of MC was retained but also one more function was acquired. The maximum cumulative release percentages of Rhodamine B from the CLMC/PVA (3 : 7) hydrogel in the mediums of pH 7.4 and 1.2 were 43.36 and 37.44%, respectively. Such a pH-responsive release behavior also confirmed that CLMC was anionic. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 137
·期 48
·49591
·
IF 2.52
Jiaji Cheng,Shaoshuai Niu,Dan Ma,Yue Zhou,Feng Zhang,Wenjuan Qu,Dong Wang,Shaoxiang Li,Xinlong Zhang,Xianqun Chen
In this article, a flame retardant microcapsule ammonium polyphosphate microencapsulated by polyurea (POAPP) was successfully synthesized by interfacial polymerization method using ammonium polyphosphate (APP) as core and polyurea as shell. The microencapsulation is observed by scanning electron microscopy and characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis and hydroscopicity test, which prove the success in synthesizing microencapsulation. When the POAPP is added into rigid polyurethane foam (RPUF), the flame retardant and mechanical properties are investigated using cone calorimeter, limited oxygen index test, and compressive strength test. The PHRR of RPUF-POAPP20 decreased from 336.52 kW/m 2 (Ref. RPUF) to 203.84 kW/m 2 and the THR of RPUF-POAPP20 was only 7.6 MJ/m 2 , which is 33.9% lower than that of Ref. RPUF. Furthermore, the limiting oxygen index of RPUF-POAPP20 reaches 24.8%, which increased by 36.3% compared to Ref. RPUF. Whereas the maximum compressive strength of RPUF-POAPP5 was 7.46 MPa, which is higher than that of RPUF-APP5.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 31
·45149
·
IF 1.86
Shu Guang Ouyang,Jun Yan Yao,Guang Heng Wei Zhu,Zhao Yue Liu,Chi Feng,Gang Wang
In this article, a new modified poly(ether sulfone) flat-sheet ultrafiltration membrane, which is expected to effectively handle coking sewage, was prepared by an immersion precipitation phase-inversion technique to settle the wastewater treatment problem in coking plants. Nanometer TiO 2 particle–poly(ethylene glycol) (PEG) blends were used as additives to modify the membranes by a blending method. The effects of different PEG mass concentrations on the membrane structure and properties were studied. The pure water flux and chemical oxygen demand (COD) rejection rate were analyzed as aggregative indicators by the comprehensive evaluation method, and then, the optimal PEG mass concentration was determined. The results show that the best modified effect was obtained at a PEG mass concentration of 0.25%. When coking sewage in a secondary settling tank was filtered with such membranes, the COD rejection rate reached 90.68%, and the water flux was 127.21 L m −2 h −1 . © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45149.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 123
·期 6
·3255-3260
·
IF 1.24
Hongbo Liu,Shaoguo Wen,Jihu Wang,Yu Zhu
Composite particles of carbon black-polystyrene with controllable size were successfully prepared using high-speed homogenization-assisted suspension polymerization. The carbon black particles were modified by oleic acid to make it more hydrophobic and more compatible with polymers before the encapsulation process. The effects of homogenization speed, homogenization time, agitation speed, pigment concentration, and stabilizer concentration on the properties of complex spheres were investigated in detail. The results of orthogonal experiments proved that the stabilizer concentration plays the most important role in controlling the size of complex particles. The particles were also characterized by FTIR and SEM. SEM photographs proved that the complex particles had good spherical forms with smooth surfaces. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 123
·期 3
·1675-1683
·
IF 1.24
Nianjun Kang,Zhongjie Du,Hangquan Li,Chen Zhang,Zhehan Zhao
A series of β-cyclodextrin-based epoxy resins were synthesized with different epoxy equivalent weights. Their chemical structures were characterized with Fourier Transform Infrared Spectroscopy (FTIR) and Nuclear Magnetic Resonance Spectroscopy (NMR) examination. These epoxy resins were cured using L -arginine as a curing agent, and the degradation behavior of the cured resins was evaluated under different acidic buffer solutions at 37°C. The degradable behavior of such epoxy resins suggested potential applications as environment friendly materials. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 30
·46530
·
IF 1.901
Kaijie Dong,Qinze Liu,Gang Wei,Tao Hu,Jinshui Yao,Xian Zhang,Tingting Gao
A novel magnetic adsorbent, poly(catechol-1,4-butanediamine)-coated Fe 3 O 4 composite (Fe 3 O 4 @PCBA), was successfully fabricated via an easy and gentle method according to the mussel-inspired adhesion property of polydopamine. Effects of many factors on the adsorption performance of Fe 3 O 4 @PCBA for Cr(VI) were investigated, including temperature, pH value, contacting time, adsorbent dosage, and initial Cr(VI) concentration. The thermodynamics, adsorption isotherm, kinetics, and intraparticle diffusion of adsorption were also studied systematically. Results indicated that the removal rate of Cr(VI) was approximately close to 100% when the initial concentration was less than 120 mg/L, and the maximum uptake capacity of Fe 3 O 4 @PCBA for Cr(VI) was 280.11 mg/g complied with Langmuir isotherm model. Accordingly, the nocuous Cr(VI) could be partially reduced to Cr(III) during the adsorption period. Hopefully, this strategy could be extended to prepare series of magnetic Fe 3 O 4 @catechol–amine adsorbents with different amino and phenolic hydroxyl groups for Cr(VI) removal. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46530.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 6
·51614
·
IF 3.125
Wenyi Zhang,Zhongwei Chen,Yuan Yu,Tingting Chen,Qingwu Zhang,Changxin Li,Zhiquan Chen,Wei Gao,Juncheng Jiang
Phosphorus and silicon co-doped graphitic carbon nitride (PSiCN) was synthesized by inducing the polycondensation reaction of melamine, diammonium hydrogen phosphate, and silicic acid. The structure and thermal properties of PSiCN were characterized. With the incorporation of 2 wt% of PSiCN and 8 wt% of ammonium polyphosphate (APP), EP/2PSiCN-8APP composite exhibited a limiting oxygen index value of 29.0% and passed a UL-94V-0 rating, which reached the refractory level. The thermogravimetric analysis confirmed that the addition of PSiCN and APP improved the thermal stability of the composites. The cone calorimetry test (CCT) revealed that the peak of heat release rate, total heat release, the peak of smoke production rate and total smoke production of EP/2PSiCN-8APP composite was reduced by 71.1%, 53.5%, 65.4%, and 53.5%, respectively, compared with pure EP. Furthermore, the residues after CCT were evaluated by scanning electron microscopy, laser Raman spectroscopy and Fourier transform infrared spectroscopy, and the flame retardant mechanism of EP/2PSiCN-8APP composite was proposed. Finally, the parallel arrangement of the aromatic ring and the surface of the PSiCN and the synergistic effect of the P/N/Si multi-element resulted in EP/2PSiCN-8APP with excellent mechanical properties.
研究领域:
材料科学
·
高分子化学
·
燃烧与防火科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 38
·e52905
·
IF 3.057
Jin Wang,Jingjing Bian,Bin Pu,Yuanlu Wang,Mengde Deng
Polyelectrolyte hydrogel used for supercapacitors have the roles of both electrolyte and separator, the morphology and the strength of gel polyelectrolyte (GPE) are the keys for ionic transport properties therein. Here, the P(NVP- co -SPE)/polyvinyl alcohol (PVA) IPN hydrogel was prepared by photopolymerization and thermal polymerization, respectively. The influences of preparation method on morphology, mechanical strength and electrochemical performances were studied. Photopolymerized IPN GPE (UV-GPE) exhibits a special regular microphase separation structure, and therefore has outstanding strength-toughness and better electrochemical performance. The tensile strength and the toughness increased intensively from the 6.2 MPa and 3.4 MJ m −3 of thermal polymerized IPN GPE (TH-GPE) to 28.5 MPa and 24.9 MJ m −3 , respectively. The maximum swelling ratio of UV-GPE is increased from 327% of TH-GPE to 630%. The ionic conductivity of UV-GPE increased from 4.29 × 10 −2 S/cm of TH-GPE to 5.82 × 10 −2 S/cm. UV-GPE has higher response current and specific capacitance. It also has the obviously better charge–discharge symmetry and cycling stability, and the capacity retention rate is still 92.3% after 1000 cycles. Thus, it brings out the fast, eco-economic photopolymerization method is an effective way to prepare high-performance polyelectrolyte hydrogel.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 29
·
IF 1.768
Cuicui Wang,Heyi Ge,Huashi Liu,Shuai Guo
The Graphene oxide (GO) sheets were used for preparing the epoxy resin Pickering emulsion. The particle size and the zeta potential of the Pickering emulsion were measured to evaluate its stability. The stable emulsion could be served as the film former of sizing agent for carbon fiber (CF). The effect of the Pickering emulsion stabilized by GO sheets on the properties of CF and the interfacial adhesion property of CF reinforced composite were investigated. Scanning electron microscopy (SEM) images showed that there existed a layer of sizing agent film with GO sheets evenly on the CF surface. Abrasion resistance and stiffness values of CF were tested and the results indicated that the sized CF conformed to the requirement of CF handleability. The interlaminar shear strength (ILSS) test indicated that the interfacial adhesion of the composite could be greatly improved. The fracture surfaces of CF composites were examined by SEM after ILSS tests. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42285.
研究领域:
材料科学
·
复合材料
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 35
·
IF 1.768
Jie Chen,Zengshe Liu,Ke Li,Jinrui Huang,Xiaoan Nie,Yonghong Zhou
A natural plasticizer with multifunctional groups, similar in structure to phthalates, cardanol derivatives glycidyl ether (CGE) was synthesized from cardanol by a two-step modification process and characterized by FT-IR, 1 HNMR, and 13 CNMR. The resulting product was incorporated to PVC (CGE/PVC), and plasticizing effect was compared with PVC incorporated with two kinds of commercial phthalate ester plasticizers bis (2-ethylhexyl) benzene-1,4-dicarboxylate (DOTP) and diisononyl phthalate (DINP). Dynamic mechanical analysis and mechanical properties testing of the plasticized PVC samples were performed in order to evaluate their flexibility, compatibility, and plasticizing efficiency. SEM was employed to produce fractured surface morphology. Thermogravimetric analysis and discoloration tests were used to characterize the thermal stabilities. Dynamic stability analysis was used to test the processability of formulations. Compared with DOTP and DINP plasticized samples, CGE/PVC has a maximum decrease of 9.27% in glass transition temperature ( T g ), a maximum increase of 17.6% in the elongation at break, and a maximum increase of 31.59°C and 25.31 min in 50% weight loss (T50) and dynamic stability time, respectively. The obtained CGE also has slightly lower volatility resistance and higher exudation resistance than that of DOTP and DINP. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42465.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 26
·
IF 1.86
Fangqiao Zhao,Xiaoma Fei,Wei Wei,Weitao Ye,Jing Luo,Yaxin Chen,Ye Zhu,Xiaoya Liu
Toughening of epoxy resin by block copolymers containing an epoxy-philic block and an epoxy-phobic block is usually costly because of their complex preparation procedure. In this work, a novel, random epoxy-amphiphilic copolymer (PHGEL), which combines an “epoxy-philic” component and an “epoxy-phobic” component, has been synthesized and evaluated as a potential toughening agent for a diglycidyl ether of bisphenol A–based epoxy thermoset (EP). The curing behavior of the EP/PHGEL system has been investigated, and the results show that the hydroxyl group on the PHGEL chain can slightly activate the curing reaction. The mechanical testing shows that the toughness of the epoxy resin is improved by 294% when 4 wt % of PHGEL is added. Simultaneously, the tensile strength, elongation at break, and glass-transition temperature are also improved. In addition, the thermogravimetric analysis shows that PHGEL has no obvious effect on the thermal stability of the epoxy thermosets. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44863.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 44
·45491
·
IF 1.86
Chengle Wang,Zhijing Wang,Juan Li
The role of dual imidazolium polyoxometalates (POMs) in the flame retardancy of polypropylene/intumescent flame retardant (PP/IFR) composites was studied. The results showed that the structures of dual imidazolium POMs have a great effect on the flame retardancy of PP composites. The dual imidazolium POMs based on an ethyl group (EMIPMA) obtain the best flame retardant efficiency. With 15.5 wt % IFR and 0.5 wt % EMIPMA, the PP composites reach a limiting oxygen index of 25.7 and the UL-94 V-0 standard. However, the dual imidazolium POMs containing a butyl (BMIPMA) or hexyl (HMIPMA) group cannot achieve the UL-94 V-0 standard at the same formulation. Dual imidazolium POMs not only promote the formation of good char, but also induce the formation of intumescent char with a hierarchical and microporous structure that helps to prevent gas and heat from transferring from the flame to the resin. Therefore, the flame retardancy of PP/IFR composites is improved. However, excessive combustible components produced by BMIPMA or HMIPMA deteriorate the flame retardancy of PP/IFR composites. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45491.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）