Journal of Polymer Research (J Polymer Res)

Publications in this journal

• Article: Highly aligned narrow diameter chitosan electrospun nanofibers

  Sajjad Haider, Yousef Al-Zeghayer, Fekri A. Ahmed Ali, Adnan Haider, Asif Mahmood, Waheed A. Al-Masry, Muhammad Imran
  Journal of Polymer Research 04/2013; 20(4):1-11.
• Article: Influences of surfactant content and type on physical properties of natural rubber/organoclay nanocomposites

  Chalermpan Keawkumay, Kasama Jarukumjorn, Jatuporn Wittayakun, Nitinat Suppakarn
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  ABSTRACT: Montmorillonite clay (MMT) was modified by octadecylamine (ODA) or octadecyltrimethyl ammonium bromide (ODTMA) surfactants. The surfactant contents were varied, i.e. 0.5, 1.0 and 2.0 times the cation exchange capacity (CEC) of the MMT. The intercalation of surfactant molecules into MMT layers was confirmed by the increase in interlayer spacing of the modified MMT, the appearance of C-H stretching bands of alkyl ammonium surfactants and the increase in decomposition temperatures of the intercalated surfactant. With increasing surfactant content, the excess amounts of surfactant which had low interaction with MMT surface increased. The MMT-ODA and MMT-ODTMA were used as reinforcing fillers for natural rubber (NR). Effects of surfactant content and type on cure characteristics, tensile and morphological properties of NR nanocomposites were determined. NR nanocomposites containing 5 phr of the organoclays were prepared by a two-roll mill. With increasing surfactant content, morphologies of the NR nanocomposites revealed the exfoliated structure and the good dispersion of the organoclay in the NR matrix. These caused the enhancement of tensile properties of the NR nanocomposites. Among all the nanocomposites, NR/MMT-ODA2 had the highest tensile strength and provided optimum scorch time and cure time.
  Journal of Polymer Research 06/2012;
• Article: Blends of thermoplastic polyurethane (TPU) and polydimethyl siloxane rubber (PDMS), part-I: assessment of compatibility from torque rheometry and mechanical properties

  Krishna Prasad Rajan, Ahmed Al-Ghamdi, P Ramesh, G B Nando
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  ABSTRACT: Thermoplastic polyurethane (TPU) and polydi-methyl siloxane rubber (PDMS) are two major polymers used extensively for biomedical applications. Blending of these polymers combines the superior mechanical proper-ties, abrasion resistance, solvent resistance and aging resis-tance of TPU with chemical stability, inertness, flexibility and biocompatibility of PDMS. In the present investigation, an 80:20 blend of TPU and PDMS was selected for the preparation of an in situ compatibilized blend using ethylene methyl acrylate copolymer (EMA) as the compatibilizer. Effect of EMA on blends of ester type and ether type TPU with PDMS was studied. From the results obtained from torque rheometry, mechanical property evaluation, fourier transform infrared spectroscopy (FTIR), atomic force mi-croscopy (AFM) and scanning electron microscopy (SEM), it was concluded that 5 wt% of compatibilizer effectively compatibilized an 80:20 blend of ester type TPU and PDMS, whereas similar blend of ether type TPU required only 2 wt% compatibilizer.
  Journal of Polymer Research 05/2012; 19(5):1-13.
• Article: Synthesis of star-shaped poly(methyl acrylate) via ATRP and preliminary evaluatio n of its reinforcing properties for PVC

  Ngoc Quyen Tran & Thi Kim Dung Hoang & Ngoc The Nguye n & Cuu Khoa Nguye n
  Journal of Polymer Research 02/2012;
• Article: Use of a novel initiator for synthesis of amino-end functionalized polystyrene (NH2-PS) by atom transfer radical polymerization

  Ali Pourjavadi, Farzad Seidi, Payam Eftekhar-Jahromi, Hamid salimi, Saeed Roshan, Ali Najafi, Nico Bruns
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  ABSTRACT: Here we report a versatile new method for endfunctionalizing polystyrene. In order to produce polystyrene with an amino end group, 2-(3-bromo-3-phenylpropyl) isoindoline-1,3-dione was synthesized and used as a novel initiator for ATRP. After ATRP polymerization, tri-n-butyltin hydride ((n-Bu)3SnH) reductively replace existing halogens on polymer chains by hydrogen. Finally, the phthaloyl groups on polymer backbone were cleaved by treatment with hydrazine yielding amino terminated polystyrene. A polymer with Mn≈10,350 and Mw/Mn01.17 was obtained. Therefore, this method allows the preparation of amino end functionalized polystyrene of narrow polydispersity with complete degree of functionalization.
  Journal of Polymer Research 01/2012; 19:9752.
• Article: Thermo-mechanical properties of high density polyethylene – fumed silica nanocomposites: effect of filler surface area and treatment

  A Dorigato, M D'Amato, A Pegoretti
  Journal of Polymer Research 01/2012; 19(6):9889_1-9889_11.
• Article: Effects of phenyl-s-triazine moieties on thermal stability and degradation behavior of aromatic polyether sulfones

  Guipeng Yu, Cheng Liu, Bing Li, Liwei Wang, Jinyan Wang, Xigao Jian
  Journal of Polymer Research 01/2012; 19(3):1-8.
• Article: Preparation and physical characterization of SWCNTs-polycarbonate nanocomposites

  AymanS Ayesh
  Journal of Polymer Research 01/2012; 19(12):1-10.
• Article: Synthesis of dimethacrylates monomers with low polymerization shrinkage and its application in dental composites materials

  Jingwei He, Fang Liu, Pekka K. Vallittu, Lippo V. J. Lassila
  Journal of Polymer Research 01/2012;
• Article: Physical characterizations of semi-conducting conjugated polymer-CNTs nanocomposites

  M. Abu-Abdeen, A.S. Ayesh, A.A. Al Jaafari
  Journal of Polymer Research 01/2012; 19(3):1-9.