With the collaboration of Iran Polymer Society

Structure and property relationship
Electrical properties of UHMWPE/graphite nanoplates composites obtained by in-situ polymerization method

Igor Chmutin; Ludmila Novokshonova; Petr Brevnov; Guzel Yukhayeva; Natalia Ryvkina

Volume 4, Issue 1 , January 2017, , Pages 1-12

https://doi.org/10.22063/poj.2016.1384

Abstract
  There are described nanocomposites based on ultra high molecular weight polyethylene and graphite nanoplates prepared by in-situ polymerization method. It is carried out a comprehensive study of electric properties of these composites, including direct current (dc) and alternating current (ac) properties. ...  Read More

Polymer processing
The influence of branching efficiency on the rheology and morphology of melt state long chain branched polypropylene/polybutene-1 blends

Ali Foroozan; Tahereh Behboodi; Yousef Jahani

Volume 6, Issue 1 , January 2019, , Pages 1-11

https://doi.org/10.22063/poj.2018.2181.1112

Abstract
  In this study, the compatibility of the blends of polypropylene (PP) and polybutene-1(PB-1) homopolymer before and after long chain branching process were studied. The blends were prepared and long-chain branched directly via reactive extrusion process in presence of free radical initiator and trimethylolpropane ...  Read More

Reaction engineering
Interplay of reversible chain transfer and comonomer incorporation reactions in coordination copolymerization of ethylene/1–hexene

Ali Ebrahimi; Saeid Ahmadjo; Mohsen Mohammadi; Mohammad-Mahdi Mortazavi; Mostafa Ahmadi

Volume 7, Issue 1 , January 2020, , Pages 1-11

https://doi.org/10.22063/poj.2019.2447.1132

Abstract
  Coordinative chain transfer polymerization (CCTP) has opened a new path for the development of novel products like olefin block copolymers and chain-end functional polyolefins. However, conflicting results are frequently reported on the catalyst performance including activity and comonomer selectivity ...  Read More

Characterization
Melt free-radical grafting of glycidyl methacrylate (GMA) onto EPDM backbone and effect of EPDM-g-GMA on the morphology and mechanical properties of PS/EPDM/PA6 ternary blends

Marzie Alidadi-Shamsabadi; Shirin Shokoohi

Volume 8, Issue 1 , January 2021, , Pages 1-9

https://doi.org/10.22063/poj.2020.2727.1161

Abstract
  Melt free-radical grafting reactions between ethylene-propylene-dieneterpolymer (EPDM) and glycidyl methacrylate (GMA) were investigated in a batch mixer (170°C, 60rpm). Effect of dicumylperoxide (DCP) initiator and GMA functionalizing monomer concentrations was studied on the grafted EPDM characteristics. ...  Read More

Insights into the effect of vanadium on chromium-vanadium Phillips catalysts for the ethylene polymerization

Shijia Ling; He Ren; Rui Zhang; Yue Liu; Boping Liu; Ruihua Cheng

Volume 7, Issue 2 , July 2020, , Pages 61-78

https://doi.org/10.22063/poj.2020.2645.1151

Abstract
  The chromium/vanadium bimetallic Phillips catalysts developed by our research group have been proved to be a promising process to produce bimodal polyethylene using a single-reactor process. The vanadium loading of CrV-1/1, CrV-1/2, and CrV-1/3 has a significant effect on the polymerization activity, ...  Read More

Olefin polymerization and copolymerization
Optimization of 1,3-butadiene monomer coordination polymerization using response surface methodology (RSM)

Ahmad-Ali Shokri; Saeid Talebi; Mehdi Salami-Kalajahi

Volume 8, Issue 2 , July 2021, , Pages 63-72

https://doi.org/10.22063/poj.2021.2767.1166

Abstract
  Laboratory runs can be minimized via experimental design which yields the optimum and best data regarding the independent parameters. In this research work, response surface methodology (RSM) based on a threelevel central composite design (CCD) was utilized to optimize and evaluate the interactive effects ...  Read More

Catalysis
Production of titanium tetrachloride (TiCl4) from titanium ores: A review

Hossein Bordbar; Ali Akbar Yousefi; Hossein Abedini

Volume 4, Issue 2 , June 2017, , Pages 149-173

https://doi.org/10.22063/poj.2017.1453

Abstract
  Titanium (Ti) is the ninth most abundant element on earth. The titanium mineral ores are widely distributed in different parts of the world. The two main ores of titanium include rutile (TiO2) and ilmenite (FeO.TiO2). It is aimed to provide the readers with an insight to the main processes currently ...  Read More

Catalysis
Discovery and development of metallocene-based polyolefins with special properties

Walter Kaminsky; Mercia Fernandes

Volume 2, Issue 1 , January 2015, , Pages 1-16

https://doi.org/10.22063/poj.2015.1101

Abstract
  Beside Ziegler-Natta and Phillips catalysts the development of methylaluminoxane (MAO) as cocatalyst in combination with metallocenes or other transition metal complexes for the polymerization of olefins has widely increased the possibilities in controlling the polymer composition, polymer structure, ...  Read More

Structure and property relationship
Influence of annealing on anisotropic crystalline structure of HDPE cast films

Ali Yadegari; Jalil Morshedian; Hossein-Ali Khonakdar; Udo Wagenknecht

Volume 3, Issue 1 , January 2016, , Pages 1-9

https://doi.org/10.22063/poj.2016.1269

Abstract
  High density polyethylene (HDPE) films were produced using cast film extrusion process with different draw ratios, ranging from 16.9 to 148.8. Morphology, crystallinty and orientation state of crystalline and amorphous phases of the cast films were investigated using scanning electron microscopy (SEM), ...  Read More

Composites and nanocomposites
Mechanical, morphological and water absorption properties of polyethylene/olive pomace flour bio-composites

Raid Banat; Malek Aljnaid; Manal Al-Rawashdeh

Volume 9, Issue 1 , January 2022, , Pages 1-14

https://doi.org/10.22063/poj.2021.2903.1184

Abstract
  Mechanical and physical properties of various weigh percentages (0% - 40%) of olive pomace flour (OPF)-loaded linear low density polyethylene (LLDPE) in the presence of 0%, 5% and 10% coupling agent (C) were formulated and studied. Extrusion and hot press processing techniques were used to fabricate ...  Read More

Polyolefins Functionalization
Comparison of grafting of maleic anhydride onto linear low density polyethylene with hexene-1 and butene-1 comonomers and prediction of optimum ingredients by response surface methodology

Mohammad Shahbazi; Yousef Jahani

Volume 8, Issue 1 , January 2021, , Pages 11-19

https://doi.org/10.22063/poj.2020.2745.1163

Abstract
  In this work, the grafting of maleic anhydride onto two types of linear low density polyethylene with hexene-1 comonomer (LLDPE-H1) and butene-1 comonomer (LLDPE-B1), in the presence of styrene monomer (St) and dicumyl peroxide initiator (DCP) has been studied. The combined influences of MAH, St and ...  Read More

Polyolefin degradation
Anti-fouling behaviors of surface functionalized high density polyethylene membrane in microfiltration of bovine serum albumin protein

Milad Fonouni; Reza Yegani; Sattar Anarjani; Akram Tavakoli

Volume 4, Issue 1 , January 2017, , Pages 13-26

https://doi.org/10.22063/poj.2016.1343

Abstract
  An essential characteristic for high performance inherently hydrophobic membranes such as microporous high density polyethylene (HDPE) membranes is to have a hydrophilic surface. In this project, wet chemical functionalization as a facile and effective method was developed to give a hydrophilic property ...  Read More

Thermal-insulation performance of low density polyethylene (LDPE) foams: Comparison between two radiation thermal conductivity models

Rezgar Hasanzadeh; Taher Azdast; Ali Doniavi; Richard Eungkee Lee

Volume 6, Issue 1 , January 2019, , Pages 13-21

https://doi.org/10.22063/poj.2018.2185.1113

Abstract
  The loss of energy especially in industrial and residential buildings is one of the main reasons of increased energy consumption. Improving the thermal insulation properties of materials is a fundamental method for reducing the energy losses. Polymeric foams are introduced as materials with excellent ...  Read More

Characterization
Optimization of parameters affecting separation of gas mixture of O2, N2, CO2 and CH4 by PMP membrane modified with TiO2, ZnO and Al2O3 nanoparticles

Afshar Alihosseini; Davood Zergani; Amir Hossein Saeedi Dehaghani

Volume 7, Issue 1 , January 2020, , Pages 13-24

https://doi.org/10.22063/poj.2019.2463.1134

Abstract
  The application of membranes in various industries is one of the most urgent needs to reduce energy consumption and environmental pollutants as well as low investment costs in the process of separation. In this investigation, the optimization of effective parameters for separation of gas mixture of CH4, ...  Read More

Catalysis
Development of half-titanocene catalysts for synthesis of cyclic olefin copolymers

Kotohiro Nomura

Volume 10, Issue 2 , May 2023, , Pages 59-70

https://doi.org/10.22063/poj.2023.3308.1250

Abstract
  Certain cyclic olefin copolymers (COCs) are known as promising amorphous materials with high transparency in the UV-vis region, thermal and humidity resistance, low dielectric constant, low water absorption, and dimensional stability. This short review focuses on the synthesis of (new) cyclic olefin ...  Read More

Catalysis
Addition of a second alcohol in magnesium ethoxide synthesis as a way to vary the pore architecture of Ziegler-Natta catalysts

Toshiaki Funako; Patchanee Chammingkwan; Toshiaki Taniike; Minoru Terano

Volume 2, Issue 2 , June 2015, , Pages 65-71

https://doi.org/10.22063/poj.2015.1131

Abstract
  In Ziegler-Natta olefin polymerization, the pore architecture of catalysts plays a crucial role in catalytic performances and polymer properties. While the type of preparation routes (such as chemical reaction and solution precipitation) greatly affects the catalyst pore architecture as a result of different ...  Read More

Structure and property relationship
Effect of multi-walled carbon nanotube on mechanical and rheological properties of silane modified EPDM rubber

Fateme Khademeh Molavi; Sedigheh Soltani; Ghasem Naderi; Rohollah Bagheri

Volume 3, Issue 2 , June 2016, , Pages 69-77

https://doi.org/10.22063/poj.2016.1293

Abstract
  A novel mixing approach for achieving a good dispersion of multi-walled carbon nanotubes (MWCNTs) in ethylene- propylene diene monomer (EPDM) matrix has been investigated. In this approach EPDM was modified with vinyltrimethoxysilane (VTMS) during melt mixing. In addition the effect of MWCNT concentration ...  Read More