With the collaboration of Iran Polymer Society
Composites and nanocomposites
Preparation and characterization of nano WO3/Bi2O3/GO and BaSO4/GO dispersed HDPE composites for X-ray shielding application

Tohid Abdolahzadeh; Jalil Morshedian; Shervin Ahmadi

Volume 9, Issue 2 , July 2022, Pages 73-83

https://doi.org/10.22063/poj.2022.3009.1201

Abstract
  Researchers have studied the possibility of various polymer composites for radiation shielding applications. Lightness and non-toxicity of these materials are their significant advantages compared to Pb base traditional and common shields. In this research, polyethylene (HDPE)-based composites for shielding ...  Read More

Olefin polymerization and copolymerization
Synthesis and assessment of the effect of monomer feed ratio and Lewis acids on copolymerization of butyl methacrylate/1-octene

Mohammad Reza Jozaghkar; Seyed Mehrdad Jalilian; Farshid Ziaee

Volume 9, Issue 2 , July 2022, Pages 85-91

https://doi.org/10.22063/poj.2022.3062.1207

Abstract
  This study was designed to investigate the effect of molar ratio of 1-octene and type as well as concentration of Lewis acids on the free radical copolymerization of butyl methacrylate (BMA) with 1-octene. The synthesized copolymers have been substantially described by FTIR, 1H NMR, GPC and DSC. The ...  Read More

Catalysis
The influence of the oxygen donor capacity of polystearylmethacrylate over polyethylene bulk density when using modified methylaluminoxane as co-catalyst

Odilia Pérez-Camacho; Eduardo Cardozo-Villalba

Volume 9, Issue 2 , July 2022, Pages 93-101

https://doi.org/10.22063/poj.2022.3095.1210

Abstract
  In this work, the interaction between a polystearylmethacrylate (Mn = 8,900 g mol-1, Xn = 26, Ð = 1.1) and modified methylaluminoxane 12 (MMAO-12) co-catalyst is studied using different spectroscopic methods. The effect of this oxygen-donor additive was measured by the changes in the bulk ...  Read More

Catalysis
Regulation of molecular weight, molecular weight distribution and branching distribution in polyethylene, produced by supported catalysts bearing bis(imino)pyridyl Fe(II) and N,N-α-diimine Ni(II) complexes

Nina V. Semikolenova; Valentina N. Panchenko; Mikhail A. Matsko; Vladimir A. Zakharov

Volume 9, Issue 2 , July 2022, Pages 103-116

https://doi.org/10.22063/poj.2022.3072.1208

Abstract
  For preparation of highly active supported catalyst with bis(imino)pyridyl Fe(II) complexes (Fe1, Fe2) and N,N-α-diimine complex of Ni (Ni3), silica modified with alumina (SiO2 (Al)) was used as a support. Data on the possibility to regulate molecular weight (MW) and molecular weight distribution ...  Read More

Catalysis
Characterization of phthalate internal donor in MgCl2 supported Ziegler-Natta catalyst by solid state 13C NMR

Masayoshi Saito; Toshiya Uozumi; Masahide Murata; Takuo Kataoka; Riichiro Chujo

Volume 9, Issue 2 , July 2022, Pages 117-127

https://doi.org/10.22063/poj.2022.3073.1209

Abstract
  Ziegler-Natta catalyst for propylene polymerization, which TiCl4 and di-alkyl phthalate were supported on MgCl2, was analyzed by solid state 13C NMR. It was confirmed that the spin-lattice relaxation time (“relaxation time” hereafter) of carbonyl group in phthalate was shortened with ...  Read More

Polymeric foams
Foam rotational molding of hybrid polyethylene nanocomposites: synergistic effect of microtalc and nanoclay

Saeed Karimzadeh; Taher Azdast; Rezgar Hasanzadeh; Milad Moradian; Hamidreza Akrami

Volume 9, Issue 2 , July 2022, Pages 129-138

https://doi.org/10.22063/poj.2022.3134.1212

Abstract
  Rotational molding is a process used to produce seamless, one-piece, and hollow polymeric parts. Foam rotational molding has recently become an increasingly important process in the foam industry. However, foam rotational molding is still a challenging process to fabricate polymeric foams. The focus ...  Read More

Olefin polymerization and copolymerization
Effect of 5-ethylidene-2-norbomene or cyclopentene comonomers on the micro-structures, mechanical and dynamic mechanical properties of polydicyclopentadiene

Yingying Mi; Zaixing Yang; Fei Zhou; Xuelian He

Volume 9, Issue 2 , July 2022, Pages 139-149

https://doi.org/10.22063/poj.2022.3144.1216

Abstract
  A copolymerization reaction was carried out by adding different contents of 5-ethylidene-2-norbomene or cyclopentene to dicyclopentadiene (DCPD) using an optimized polymerization process. The effects of different amounts of the comonomers on the conversion, mechanical properties and thermal stability ...  Read More

Effect of different catalyst ratios on the ring-opening metathesis polymerization (ROMP) of dicyclopentadiene

Zehan Zhang; Zaixing Yang; Fei Zhou; Xuelian He

Volume 9, Issue 2 , July 2022, Pages 151-162

https://doi.org/10.22063/poj.2022.3145.1217

Abstract
  In this paper, the polymerization process of polydicyclopentadiene (PDCPD) obtained by using dicyclopentadiene (DCPD) and the 2nd generation Grubbs’ catalyst is optimized. The curing reaction kinetics was studied by differential scanning calorimetry (DSC), and the solidification reaction process ...  Read More

Olefin polymerization and copolymerization
Nitroxide mediated radical polymerization of styrene from poly(ethylene terephthalate) and its polymer/montmorillonite nanocomposite

Saber Ghasemi Karaj-Abad; Lily Sadr; Mojtaba Abbasian; Mehdi Hosseinzadeh; Solmaz Esmaeily Shoja; Mehdi Jaymand

Volume 9, Issue 2 , July 2022, Pages 163-174

https://doi.org/10.22063/poj.2022.3112.1211

Abstract
  In this study, for the first time, a novel strategy for the synthesis of graft copolymers using polystyrene (PSt) monomer from surface modification of poly(ethylene terephthalate) PET through surface-initiated nitroxide-mediated radical polymerization was performed. For this purpose, the PET surface ...  Read More