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MING ZHAI¹, BEN JIANG, HAIMEI LI, QIAN LI, LIXIA WANG
Journal of Polymer Materials, Vol.35, No.3, pp. 257-264, 2018, DOI:10.32381/JPM.2018.35.03.1
Abstract The effects of processing parameters on surface roughness of microcellular injection molded PC parts were investigated. Taguchi design of experiments (DOE) was performed with varying mold temperature, melt temperature, injection rate and supercritical fluid (SCF) concentration. It was found that mold temperature, injection rate and melt temperature appear to be the predominant molding parameters which affect the surface roughness. The results are helpful for designers to optimize the process conditions to achieve high quality microcellular PC part. More >

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WEI ZHU^a, ZHOU TIAN^b,*, PINGKAI JIANG^c, BOPING LIU^d,*
Journal of Polymer Materials, Vol.35, No.3, pp. 265-279, 2018, DOI:10.32381/JPM.2018.35.03.2ej
Abstract In this study, several (SiO₂ /MgO/ID/MClx/MgCl₂ )·TiClx Ziegler-Natta Catalysts are synthesized by a co-impregnation method to study a third metal (Zr, V, Fe, Mn, W) effect on catalytic performance in propylene polymerization. When the metal doping content is 10 wt% (compare to magnesium elements), the activity of W doped catalyst shows 60.0% higher. While the activity of Zr, V, Fe and Mn doped catalyst both decreased. Correlations of the catalyst activities with the iron radius and the electronegativity of the third metal elements are discussed. In the same doping content condition, metals have similar radius with More >

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LIJUN CHEN, TANTAN SHAO, YILU GONG, XIUMING WANG, ZHIJUAN SUN
Journal of Polymer Materials, Vol.35, No.3, pp. 281-293, 2018, DOI:10.32381/JPM.2018.35.03.3
Abstract Cross-linked vinyl acetate and vinyl versatate (VeoVa) polymer latex (VAc-VeoVa10) modified with fluorine and silicon was successfully synthesized via the semi-continuous seeded emulsion polymerization technology. The latex was emulsified by green surfactants of sodium alphaolefin sulfonate(α-AOS) and cashew phenol polyoxyethylene ethers(BCE-10) and initiated with potassium persulfate(KPS). The chemical structure of the latex was analyzed by fourier transformed infrared (FTIR). The glass transition temperature (T_g ) was detected by differential scanning calorimetry(DSC) measurement. The water resistance was determined by the water contact angle (WCA) measurement. The polymerization condition of preparing the latex was optimized. Results showed that More >

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XINHUA LIU^a,*, HONGZHANG LI^b, ZHI LIU^a,*, YINCHUN FANG^a, CUIE WANG^a
Journal of Polymer Materials, Vol.35, No.3, pp. 295-304, 2018, DOI:10.32381/JPM.2018.35.03.4
Abstract Bismuth Tungstate has been widely used in catalytic degradation of pollutants. However, the low specific surface area make it difficult to use. Herein, bismuth/tungstate/polyacrylonitrile (PAN) nanofiber was prepared by electrospinning. After oxidation treatment, the bismuth tungstate/ PAN composite nanofiber membrane showed photo catalytic activity. The photocatalytic property of resulting membrane was evaluated by the photodegradation of methylene blue. The results showed that the photodegradation rate reached to 95.53% after 4.5h. The photodegradation rate of the membrane still preserved 83.88% after 8 times reuse, indicating its reusability. Thus, the visible-light-catalyst has potential application in sewage treatment. More >

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SHIVA ARUN^a, YADVENDRA SINGH^a, AMREEN NAZ^a, PRABHA BHARTIYA^a, KSHAMA SRIVASTAVA^b, SHAHID SUHAIL NARVI^a, PRADIP KUMAR DUTTA^a,*
Journal of Polymer Materials, Vol.35, No.3, pp. 305-316, 2018, DOI:10.32381/JPM.2018.35.03.5
Abstract Encapsulation of polyoxometalates into chitosan have drawn tremendous attraction of researchers in biomedical science. Chitosan (CS) is widely studied for its significant biomedical applications. In this study we have synthesized a nano-composite by encapsulating a cobalt substituted lacunary undecatungstosilicate [CoSiW₁₁O₃₉(H₂ O)]^6-, intobiocompatible chitosan. The combination of polyoxometalate with chitosan is not merely physical mixture but indeed it is nano-composite formed by electrostatic interaction between anionic polyoxometalate and cationic chitosan. The resulting nano-complex, (CoSLPOM-CS) was characterized by FT-IR, UV-Vis spectra, energy dispersive X-ray (EDX), scanning electron microscopy (SEM), atomic force microscopy (AFM) and Dynamic light scattering (DLS). More >

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N. GOBI¹, E. VIJAYALAKSHMI¹, BERLY ROBERT¹, N. R. SRINIVASAN²
Journal of Polymer Materials, Vol.35, No.3, pp. 317-328, 2018, DOI:10.32381/JPM.2018.35.03.6
Abstract Airborne dust particles has become an ever-increasing environmental concern and is also a threat to public health, leading the way in the development of fibrous materials with fascinating features like high filtration efficiency and low pressure drop. To enhance the filtration efficiency of fibrous material, particularly for submicron- sized particles, here we report a promising and versatile electret polyacrylonitrile-silicon dioxide (PAN- SiO₂ ) fibrous membrane, considering the higher particle capture efficiency for an electret filter compared to a conventional fibrous filter. The chemical bond nonwoven and spun bond nonwoven substrates were used as support material to More >

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YI CHEN, WENQIN HE, SHIQI CHEN, JIANGBO WANG^*
Journal of Polymer Materials, Vol.35, No.3, pp. 329-340, 2018, DOI:10.32381/JPM.2018.35.03.7
Abstract In the present work, the flame retardancy and thermal degradation behavior of epoxy resin (EP) treated with a phosphorus and silicon-containing compound (DOPO-V) were investigated. Cone calorimetry measurement revealed that a significant reduction of peak heat release rate (PHRR) and total heat release (THR) of EP/DOPO-V (FREP) relative to the pure EP was achieved. Moreover, the Kissinger and Flynn-Wall-Ozawa methods were used to determine the activation energy for the degradation of pure EP and FREP composites. The kinetic results showed that the addition of DOPO-V decreased the activation energies of the first and middle stage More >

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MEHDI HOSSEINZADEH^1,*, FARIDEH MAHMOODZADEH²
Journal of Polymer Materials, Vol.35, No.3, pp. 341-353, 2018, DOI:10.32381/JPM.2018.35.03.8
Abstract A novel functional resin, polyacrylonitrile-melamine (CPAN-M), was made through the nucleophilic addition reaction of cross-linked polyacrylonitrile (CPAN) with melamine. It was developed for the removal of Cu (II), Pb (II) and Zn (II) from aqueous solution. The sorption experiments were investigated by synthesized functional resin under different experimental conditions, such as temperature, initial concentration, pH and contact time. The results showed that the adsorption behavior of the resin for selected metal ions was found to be greater at higher pH values. The high adsorption rate (<20 min) was seen. The maximum adsorption capacity on CPAN-M More >

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YONG WEN^a,b, NA TENG^a, FEI LIU^a, RUOYU ZHANG^a, HAIFANG WANG^b, JING CHEN^a,1, JIN ZHU^a, HAINING NA^a,*
Journal of Polymer Materials, Vol.35, No.3, pp. 355-369, 2018, DOI:10.32381/JPM.2018.35.03.9
Abstract In this work, we establish a facile and efficient method to synthesize the polyurethanes (PUs) containing hydroxyl-terminated polybutadiene (HTPB) through microwave-assisted reactions. Comparisons of conventional heat versus microwave reactions have been made. Microwaveassisted synthesis has been found to significantly decrease the reaction time and reduce side reaction of carbon-carbon bond relative to conventional heat. Moreover, we develop a more advanced molecular design for HTPB based PU ranging from content of hard segment to types of non-planer ring structures. The Characterization of the polymers has been conducted with FT-IR, TGA, thermal and mechanical analysis. Among them, More >

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AKANSHA DIXIT, DIBYENDU S. BAG^*, DHIRENDRA KUMAR SHARMA^a, HARJEET SINGH, N. ESWARA PRASAD
Journal of Polymer Materials, Vol.35, No.3, pp. 371-391, 2018, DOI:10.32381/JPM.2018.35.03.10
Abstract Crosslinking is one of the most important factors affecting the major characteristics of polymer and hydrogel materials. Now-a-days, double network (DN) hydrogels have attracted special attention for their high strength and stretchability. In this investigation, we report the effect of crosslinker concentration on the DN hydrogels which are consisting of poly(vinyl alchohol)-borax as the first network and poly(acrylamide-co-2-hydroxyethyl methacrylate) as the second network synthesized by in-situ crosslinking polymerization process using N, N’-methylenebisacrylamide (MBA) as crosslinker. Various properties of the DN hydrogels such as degree of swelling, swelling kinetics, gel fraction and network parameters (crosslink density, More >

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