Open Access

ARTICLE

HARIHARAN K^1,*, 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 More >

View

40

Download

81

Open Access

ARTICLE

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 More >

View

48

Download

37

Open Access

ARTICLE

RI-CHAO ZHANG^a,*, ZHIHUAN HUANG^a, DAN SUN^b, AI LU^c, MEILING ZHONG^a, ZHENXING FANG^a, DEHUI JI^a, GUANGYAO XIONG^a, YIZAO WAN^a
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 More >

View

35

Download

32

Open Access

ARTICLE

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 >

View

35

Download

35

Open Access

ARTICLE

RAN YAN¹, LI LEI^1,*, FEI YU², SHOUGANG CHEN^1,*
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 More >

View

43

Download

37

Open Access

ARTICLE

TEMEL ÖZTÜRK^a,b, KEVIN A. CAVICCHI^a
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 More >

View

40

Download

41

Open Access

ARTICLE

SHUANGQI ZHAO¹ , LIFEI HE², RUIXUE YIN^3,4,*, KEMIN WANG^2,4,*
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 More >

View

44

Download

37

Open Access

ARTICLE

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 More >

View

66

Download

32

Open Access

ARTICLE

JIAN ZHOU^a, ERJUN TANG^a,*, LEI ZHAO^a, RUITAO HAN^b, SHAOJIE LIU^a, DISHUN ZHAO^a
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, More >

View

38

Download

34