Home / Journals / JPM / Vol.35, No.2, 2018
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    ARTICLE

    Hydroxyapatite Coating on Selective Laser Sinter Polyamide Substrate by Electron Beam Deposition

    HARIHARAN K1,*, ARUMAIKKANNU G2
    Journal of Polymer Materials, Vol.35, No.2, pp. 149-157, 2018
    Abstract Polyamides 12 (PA-12) has an application in the medical field such as suture materials, scaffolds for tissue engineering and for various medical devices fabrication. More often the medical devices which are produced using PA-12 are addressed to be a bioinert and osseointegration with the host tissue will be in the slower rate. This experimental work aims to improve osseointegration of PA-12 by depositing a layer of bioactive material over the surface, since the surface is the first portion to interact with host tissue. Hydroxyapatite (HA) is a calcium phosphate similar to the human tissue in morphology and composition also it… More >

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    ARTICLE

    Facile Grafting of Ionic Liquids onto Halloysite Nanotubes via An Atom Transfer Radical Polymerization Method

    XINYING QIN, ZIYANG GUO, CHAO WANG, MEINING SONG, HAILEI ZHANG*, YONGGANG WU*
    Journal of Polymer Materials, Vol.35, No.2, pp. 159-169, 2018
    Abstract Ionic liquids (ILs)-based organic–inorganic nanocomposite materials are a new class of hybrid materials which can be used in lithium batteries, fuel cells, dye-sensitized solar cells and pressure sensors. Halloysite nanotubes (HNTs, Al2 Si2O5(OH)4·nH2O) are hollow like aluminosilicate clay, similar to commonly used platy clay kaolin, which open up various attractive applications including catalysis, anticorrosion, adsorbent, drug delivery, enzyme immobilization, fiber spinning and so on. However, the inorganic characteristics of clay-based halloysite nanotube result in a limited application in electronic field, making it difficult to capture attentions as extensively as carbon nanotubes. Herein, we develop a feasible and versatile approach to… More >

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    ARTICLE

    Crystallization of Poly(L-lactide) in a Confined Space between Polycarbonate Layers

    RI-CHAO ZHANGa,*, ZHIHUAN HUANGa, DAN SUNb, AI LUc, MEILING ZHONGa, ZHENXING FANGa, DEHUI JIa, GUANGYAO XIONGa, YIZAO WANa
    Journal of Polymer Materials, Vol.35, No.2, pp. 171-179, 2018
    Abstract In this paper, various thicknesses of PLLA film between PC layers are obtained by spin coating of different amount of solution. The crystal morphologies and isothermal crystallization rates of poly(L-lactide) (PLLA) in the confined spaces between polycarbonate (PC) layers have been studied by polarized optical microscopy. The Crystal morphologies of poly(L-lactide) are little influenced by the thickness of PLLA films between PC layers. Nevertheless, the crystal growth and nucleation rates of PLLA films between PC layers are remarkably affected by the thickness of PLLA films. In the confined space, the nucleation and growth rates of PLLA films decrease as its… More >

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    ARTICLE

    Effect of Concentration of 3,5,7,3’,4’- Pentahydroxyflavone on Nonlinear Properties of Doped Epoxy Polymers

    DMYTRO MISHUROV1 , ANDRII VORONKIN1, SERGEY BOGATYRENKO2
    Journal of Polymer Materials, Vol.35, No.2, pp. 181-194, 2018
    Abstract These Epoxy polymer doped with a natural chromophore 3,5,7,3’,4’-pentagydroxyflavone (quercetin) at different concentrations of the dopant. Spectral characteristics and nonlinear optical properties of the polymer materials were studied by UV-vis and FTIR spectroscopy. Morphology of the doped polymer films was observed using scanning electronic microscopy. Quadratic second susceptibilities of the obtained polymer films were calculated according to one-dimensional, rigid oriented gas model. It is shown that the morphology and nonlinear properties of the doped polymer films are directly dependent on the dopant concentration. More >

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    ARTICLE

    Sensitive Response of Chitosan Encapsulated Ibuprofen Microspheres to the narrow pH range for Drug Delivery System

    RAN YAN1, LI LEI1,*, FEI YU2, SHOUGANG CHEN1,*
    Journal of Polymer Materials, Vol.35, No.2, pp. 195-207, 2018
    Abstract Controlled drug-delivery and release systems have received increasing attention for biomedical applications. Chitosan encapsulated ibuprofen (IBU@CS) microspheres were prepared according to oil-in-water micro emulsion polymerization method for an excellent narrow pH sensitive response targeted drug delivery system. The morphology and chemical composition of IBU@CS microspheres with different formulations were characterized. The cytotoxicity test was studied by MTT assay. Results showed that the IBU@CS microspheres were in a spherical structure with a diameter in the range of 50 nm-300 nm. The IBU@CS microspheres had no toxic effect on cells. The in vitro IBU release experiments in PBS solutions of pH 6.8… More >

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    ARTICLE

    Synthesis and Characterization of Poly(epichlorohydrin-g-ε-caprolactone) Graft Copolymers by “Click” Chemistry

    TEMEL ÖZTÜRKa,b, KEVIN A. CAVICCHIa
    Journal of Polymer Materials, Vol.35, No.2, pp. 209-220, 2018
    Abstract The synthesis of poly(epichlorohydrin-g-ε-caprolactone) [poly(ECH-g-CL)] graft copolymers were carried out by use of a “click” chemistry reaction to graft poly(ε-caprolactone) propargyl (PCLpropargyl) to poly(epichlorohydrin) azido (PECH-N3 ). For this purpose, PECH-N3 was synthesized by the reaction of poly(epichlorohydrin) and sodium azide. Then PCL-propargyl was obtained by the reaction of poly(ε-caprolactone) [PCL] and propargyl chloride. By reacting PECH-N3 and PCL-propargyl, graft copolymers were obtained. The primary parameters, such as time and concentration, that influenced the reactions were assessed. The characterization of products was accomplished by using multiple instruments and methods including 1H-NMR, 13C-NMR, FTIR, GPC, DSC, TGA, and fractional precipitation [non–solvent… More >

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    ARTICLE

    Preparation of Porous Cross-linked Microsphere through Electrospraying combined with Photopolymerization

    SHUANGQI ZHAO1 , LIFEI HE2, RUIXUE YIN3,4,*, KEMIN WANG2,4,*
    Journal of Polymer Materials, Vol.35, No.2, pp. 221-229, 2018
    Abstract Porous cross-linked microspheres were manufactured from low-viscosity monomers through electrospraying combined with photopolymerization. Firstly, the liquid drops of monomer solution formed by electrospraying were crystallized by liquid nitrogen, and then the cross-linked polymer is formed by photopolymerization. Finally, the porous microspheres were obtained after the solvent was removed by freeze drying. The morphology, chemical structure, pore diameter and thermal stability of porous cross-linked microspheres were investigated by scanning electron microscope (SEM), fourier transform infrared spectroscopy (FTIR spectroscopy), mercury intrusion porosimetry and thermogravimetry analysis (TG). This approach provides a new stratage to prepare cross-linked porous microspheres from small molecules without using… More >

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    ARTICLE

    Synthesis and Physico-Chemical Study of EpoxyMaleate of 9,9'-Bis(4-hydroxyphenyl)anthrone-10 and its Jute and Glass Composites

    JABAL D. THANKI, JIGNESH P. PATEL, PARSOTAM H. PARSANIA*
    Journal of Polymer Materials, Vol.35, No.2, pp. 231-243, 2018
    Abstract Epoxy maleate of 9,9'-bis(4-hydroxyphenyl)anthrone-10 (EANM) was synthesized and its jute (J-EANMS) and glass(G-EANMS) composites were prepared by hand layup compression molding technique under 20 bar at 120°C for 5h. The structure of EANM was supported by FTIR and 1HNMR spectroscopic techniques and also characterized by acid and hydroxyl values. Thermal properties of EANM and cured EANMS were evaluated by DSC and TGA at 10°C min-1 heating rate in nitrogen atmosphere. EANM and EANMS are thermally stable up to 149o and 300°C and followed three and single step degradation kinetics. The energy of activation, frequency factor, degradation order and entropy change… More >

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    ARTICLE

    Adjustment of Molecular Weight for a Cellulose-graft-poly(ethylene glycol dimethacrylate) Polymer Brush by Atom Transfer Radical Polymerization in an Ionic Liquid

    JIAN ZHOUa, ERJUN TANGa,*, LEI ZHAOa, RUITAO HANb, SHAOJIE LIUa, DISHUN ZHAOa
    Journal of Polymer Materials, Vol.35, No.2, pp. 245-256, 2018
    Abstract A cellulose-graft-poly(ethylene glycol dimethacrylate) (cellulose-g-PEGDMA) molecule brush was synthesized by atom transfer radical polymerization in the ionic liquid 1-allyl-3- methylimidazolium chloride. The controlled mechanism of the polymer brush size and polydispersity index (PDI, Mw/Mn) were investigated. The grafting copolymers were characterized by FTIR, 1H-NMR and GPC. The results indicate that the reaction time was the main factor to control the length of the cellulose-g-PEGDMA molecule brush. The ligand was the decisive factor in controlling the PDI of the molecule brush. The PDI of PEGDMA was precisely controlled at 1.1–1.4 by using pentamethyldiethylenetriamine(PMDETA) as the ligand. Moreover, the graft molecule brush… More >

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