With the collaboration of Iran Polymer Society

Structure and property relationship
Electrical and electromagnetic properties of isolated carbon nanotubes and carbon nanotube-based composites

Alireza Nikfarjam; Roham Rafiee; Mostafa Taheri

Volume 4, Issue 1 , January 2017, , Pages 43-68

https://doi.org/10.22063/poj.2016.1371

Abstract
  Isolated carbon nanotubes (CNTs), CNT films and CNT-polymer nanocomposites are a new generation of materials with outstanding mechanical, thermal, electrical and electromagnetic properties. The main objective of this article is to provide a comprehensive review on the investigations performed in the ...  Read More

Polyolefin degradation
Effect of temperature, heating rate and zeolite-based catalysts on the pyrolysis of high impact polystyrene (HIPS) waste to produce fuel-like products

Zaher Tamri; Ali Vaziri Yazdi; Mehdi Nekoomanesh Haghighi; Mehrdad Seifali Abbas-Abadi; Amir Heidarinasab

Volume 6, Issue 1 , January 2019, , Pages 43-52

https://doi.org/10.22063/poj.2018.2189.1114

Abstract
  Pyrolysis of high impact polystyrene (HIPS) waste has been investigated under different process parameters, such as temperature, heating rate and types of zeolitic catalysts to produce valuable liquid products. Liquid, gas and coke as products of pyrolysis and aromatic, naphthene, olefin and paraffin ...  Read More

Catalysis
Polymerization of methyl methacrylate using bis(imine)cobalt, a polyolefin catalyst

Majedeh Maroofi; Gholam Hossein Zohuri; Saeid Ahmadjo; Navid Ramezanian

Volume 10, Issue 2 , May 2023, , Pages 79-88

https://doi.org/10.22063/poj.2023.3341.1257

Abstract
  A mono-nuclear catalyst of bis-imine cobalt (MC) was synthesized with using 2,6-dibenzhydryl-4-ethoxy phenyl as a ligand. The so huge ligand was prepared via the reaction of 2,6-dibenzhydryl-4-ethoxy phenyl)-N=(CH3)-C(CH3)=O with diacetyl with equal mole stoichiometry in presence of formic acid catalysis. ...  Read More

Reaction engineering
Reaction dynamics during the testing of polymerization catalyst

Nickolay Ostrovskii; Ladislav Fekete

Volume 2, Issue 2 , June 2015, , Pages 89-97

https://doi.org/10.22063/poj.2015.1156

Abstract
  The olefins polymerization process in a slurry reactor is discussed. The reaction rate dynamics was analyzed and the contributions of feed flow, gas-liquid mass transfer, polymerization reaction, and catalyst deactivation were estimated. The propylene solubility in a solvent mixture “heptane” ...  Read More

Polyolefin degradation
Comparative study of degradation of PP modified with organic pro-degradant subjected to natural and artificial ageing

Larissa Stieven Montagna; Ana Paula Testa Pezzin; Maria Madalena Forte; Ruth Marlene Santana

Volume 3, Issue 2 , June 2016, , Pages 93-101

https://doi.org/10.22063/poj.1999.1340

Abstract
  In abiotic degradation the action of light radiation is one of the most important parameters, because polymers undergo degradation due to the action of light (natural or artificial). The aim of this study was to investigate the degradation rate for samples of polypropylene (PP) modified with an organic ...  Read More

Olefin synthesis
Dual-templated synthesis of Si-rich [B]-ZSM-5 for high selective light olefins production from methanol

Salman Beyraghi; Mohammad Rostamizadeh; Reza Alizadeh

Volume 8, Issue 2 , July 2021, , Pages 93-103

https://doi.org/10.22063/poj.2021.2852.1176

Abstract
  Methanol dehydration is a high potential route for the production of light olefins (C2-C4). In this study, hierarchical Si-rich [B]-ZSM-5 catalysts (Si/Al= 200) were prepared through one-pot hydrothermal synthesis, including boron as a promoter and ethanol as a low-cost secondary template. N2 adsorptiondesorption, ...  Read More

Polymer processing
Effect of process parameters on tensile strength of welds and modeling of laser welding of PA6/NBR/clay nanocomposite by response surface methodology

Moammadreza Nakhaei; Ali Ahmadi; Ghasem Naderi

Volume 7, Issue 2 , July 2020, , Pages 99-110

https://doi.org/10.22063/poj.2020.2599.1147

Abstract
  Polyamide 6 / nitrile butadiene rubber / nanoclay (PA6/NBR/clay) nanocomposite has gathered wide acceptance in industry. Laser welding, as a fabrication method, is applied to welding of polymer nanocomposites. In this study, the input parameters (clay (Closite 30B) content, laser power, scan velocity ...  Read More

Catalysis
Dissymmetric dinuclear transition metal complexes as dual site catalysts for the polymerization of ethylene

Haif Alshammari; Helmut G. Alt

Volume 1, Issue 2 , December 2014, , Pages 107-116

https://doi.org/10.22063/poj.2014.1048

Abstract
  A series of dissymmetric dinuclear complexes were synthesized, as dual site catalysts in ethylene polymerization, by coupling the allylated a-diimine complexes of the metals Ti, Zr, V, Ni and Pd with the ansa-zirconocene complex [C5H4-SiH(Me)-C5H4]ZrCl2 possessing a hydride silane moiety. The different ...  Read More

Polyolefin degradation
The role of 1-hexene comonomer content in thermal behavior of medium density polyethylene (MDPE) synthesized using Phillips catalyst

Abbas Kebritchi; Mehdi Nekoomanesh; Fereidoon Mohammadi; Hossein Ali Khonakdar

Volume 1, Issue 2 , December 2014, , Pages 117-129

https://doi.org/10.22063/poj.2014.1099

Abstract
  In this work, the role of comonomer content of 1-hexene-medium density polyethylene (MDPE) copolymer, synthesized using Phillips catalyst, on thermal behavior parameters such as: crystallization, melting temperature and thermal degradation was investigated in detail. The copolymer was fractionated to ...  Read More

Preparation and characterization of polyethylene/ glass fiber composite membrane prepared via thermally induced phase separation method

Ali Behboudi; Yoones Jafarzadeh; Reza Yegani; Ali Akbari

Volume 4, Issue 2 , June 2017, , Pages 201-212

https://doi.org/10.22063/poj.2016.1418

Abstract
  Grinded glass fiber (GGF) embedded high density polyethylene (HDPE) membranes were prepared via thermally induced phase separation method. FESEM images showed that all the membranes had leafy structure, indicating a solid-liquid mechanism during phase separation. The results of EDX and TGA analyses confirmed ...  Read More

Catalysis
Synthesis of high molecular weight polyethylene using FI catalyst

G. Hossein Zohuri; Saman Damavandi; Saeid Ahmadjo; Reza sandaroos; Mohammad A. Shamekhi

Volume 1, Issue 1 , January 2014, , Pages 25-32

https://doi.org/10.22063/poj.2014.925

Abstract
  A FI Zr-based catalyst of bis[N-(3,5-dicumylsalicylidene)-2′,6′­diisopropylanilinato]zirconium(IV) dichloride was prepared and used for polymerization of ethylene. The effects of reaction conditions on the polymerization were examined in detail. The increase in ethylene pressure and rise ...  Read More

Nano, micro and multiscale filler-reinforced functionalized polypropylene composites: FTIR characterization and mechanical study

Nanoth Rasana; Karingamanna Jayanarayanan

Volume 9, Issue 1 , January 2022, , Pages 33-43

https://doi.org/10.22063/poj.2021.3002.1198

Abstract
  Nano, micro and hybrid filler-reinforced polypropylene (PP) composites were prepared via melt compounding technique using a twin screw extruder. The nano scale MWCNTs and micro scale glass fibers were used as reinforcements. In addition to the individual effect of nano and micro scale reinforcements ...  Read More

Characterization
Expected nucleation effects of carboxylic acid salts on poly(1-butene)

Tao Zheng; Qian Li; Qian Zhou; Huayi Li; Qian Xing; Liaoyun Zhang; Youliang Hu

Volume 3, Issue 1 , January 2016, , Pages 37-45

https://doi.org/10.22063/poj.2016.1264

Abstract
  9,10-Dihydro-9,10-ethano-anthracene-11,12-dicarboxylic acid disodium salt (DHEAS) was synthesized and used as a nucleating agent for poly(1-butene) (iPB). The isothermal crystallization kinetics of iPB having different nucleating agents were investigated by differential scanning calorimetry (DSC) and ...  Read More

Polyolefin degradation
Estimation of pyrolysis product of LDPE degradation using different process parameters in a stirred reactor

Mehrdad Seifali Abbas-Abadi; Mehdi Nekoomanesh Haghighi; Armando G. McDonald; Hamid Yeganeh

Volume 2, Issue 1 , January 2015, , Pages 39-47

https://doi.org/10.22063/poj.2015.1102

Abstract
  Pyrolysis of low density polyethylene (LDPE) by equilibrium fluid catalytic cracking (FCC) was studied in a stirred reactor under different process parameters. In this work, the effect of process parameters such as degradation temperature (420-510°C), catalyst/polymer ratio (0-60%), carrier gas type ...  Read More

Polymer processing
Changes in signal transmission speed in coaxial cables through regulating the foam structure of the polyethylene dielectric section

Milad Moradian; Taher Azdast; Ali Doniavi

Volume 8, Issue 1 , January 2021, , Pages 41-48

https://doi.org/10.22063/poj.2020.2787.1167

Abstract
  Polyolefins have been widely used in the electrical insulation and cable industry in recent years. One of the main usages of these materials is dielectric insulation in coaxial cables. Low attenuation and high signal transmission speed are among the desired features in coaxial cables. The role of polyethylene ...  Read More

Simulation & Modeling
Simulation and modeling of macro and micro components produced by powder injection molding: A review

Rezvan Yavari; Hamid Khorsand; Mehran Sardarian

Volume 7, Issue 1 , January 2020, , Pages 45-60

https://doi.org/10.22063/poj.2019.2568.1141

Abstract
  During the recent years powder processing technologies have gained much attention due to the less energy consumption and recyclable powders. Manufacturing of complicated parts by the conventional powder metallurgy (PM) method is hard due to the uniaxial pressure, which leads to the low design flexibility. ...  Read More

Polymer processing
Electron beam irradiation method to change polypropylene application: Rheology and thermomechanical properties

Fatemeh Hassan; Mehdi Entezam

Volume 6, Issue 1 , January 2019, , Pages 53-61

https://doi.org/10.22063/poj.2018.2257.1118

Abstract
  Irradiation of polymers is one of the most effective and economical methods for modifying their properties and for changing their applications. In this study, an extrusion grade polypropylene (PP) was treated by electron beam irradiation to produce a PP suitable for injection molding. Irradiation was ...  Read More

Catalysis
Preparation of high performance PP/ reduced graphene oxide nanocomposites through a combined in situ polymerization and masterbatch method

He-Xin Zhang; Seung-Ri Lee; Dong-Ho Lee; Xue-Quan Zhang; Keun-Byoung Yoon

Volume 4, Issue 1 , January 2017, , Pages 69-77

https://doi.org/10.22063/poj.2016.1375

Abstract
  Despite the great potential of graphene as a nanofiller, achieving homogeneous dispersion remains the key challenge for effectively reinforcing polyolefin (such as polyethylene (PE) and polypropylene (PP)) nanocomposites. Therefore, in this research, we report a facile combined in situ polymerization ...  Read More

Catalysis
Advances in PNP-ligated rare-earth-metal complexes: Reactivity and catalytic performances

Hongfan Hu; Rongqing Ma; Chenxi Cui; Guoliang Mao; Shixuan Xin

Volume 10, Issue 2 , May 2023, , Pages 89-99

https://doi.org/10.22063/poj.2023.3349.1259

Abstract
  Due to the large ionic radius and high electro-positivity nature, rare earth metal complexes are difficult to stabilize and undergo pathways like ligand redistribution and intramolecular C-H activation. To solve such problems and retain reactive versatility, rare earth complexes supported by a variety ...  Read More

Characterization
An investigation on non-isothermal crystallization behavior and morphology of polyamide 6/ poly(ethylene-co-1-butene)-graft-maleic anhydride/organoclay nanocomposites

Sepideh Gomari; Ismaeil Ghasemi; Mohammad Karrabi; Hamed Azizi

Volume 2, Issue 2 , June 2015, , Pages 99-108

https://doi.org/10.22063/poj.2015.1164

Abstract
  Nanocomposites based on polyamide 6 (PA6) and poly(ethylene-co-1-butene)-graft-maleic anhydride (EB-g- MAH) blends have been prepared via melt mixing. The effect of blend ratio and organoclay concentration on the crystallization and melting behavior of specimens were studied. Three types of commercial ...  Read More

Catalysis
Imido-modified SiO2-supported Ti/Mg Ziegler-Natta catalysts for ethylene polymerization and ethylene/1-hexene copolymerization

Ting Fu; Ruihua Cheng; Xuelian He; Zhen Liu; Zhou Tian; Boping Liu

Volume 3, Issue 2 , June 2016, , Pages 103-117

https://doi.org/10.22063/poj.2016.1331

Abstract
  A novel imido-modified SiO2-supported Ti/Mg Ziegler-Natta catalyst for ethylene and ethylene/1-hexene polymerization is investigated. The catalyst is prepared by modification of (SiO2/MgO/MgCl2)TiClx Ziegler-Natta catalysts via supporting vanadium species followed by reaction with p-tolyl isocyanate ...  Read More

Olefin synthesis
Ethylene yield in a large-scale olefin plant utilizing regression analysis

Mohamad Hafizi Zakria; Mohd Ghazali Mohd Nawawi; Mohd Rizal Abdul Rahman; Mohd Anas Saudi

Volume 8, Issue 2 , July 2021, , Pages 105-113

https://doi.org/10.22063/poj.2021.2795.1169

Abstract
  The research was carried out in a large-scale olefin process to see how different variables affect ethylene yield in an actual fluctuating plant condition. Regression analysis was adopted using Minitab Software Version 18 to create a reliable ethylene yield model. Regression analysis is a robust, practical, ...  Read More

Polyolefin degradation
Thermal and tensile behavior of LLDPE films containing limited amounts of an oxo-biodegradable additive and/or amorphous poly(1-hexene) before and after UV irradiation

Sara Zarei; Gholam-Reza Nejabat; Mohammad-Mahdi Mortazavi; Soheyl KhajehPour-Tadavani

Volume 7, Issue 2 , July 2020, , Pages 111-119

https://doi.org/10.22063/poj.2020.2611.1149

Abstract
  Varying amounts of an amorphous poly(1-hexene) (PH, Mv 1.7×106 Da) were added to an LLDPE matrix containing 3% w/w Addiflex oxo-biodegradable additive (HES-W) and extruded and converted into films. Then the effect of presence of PH was investigated on microstructure, thermal and tensile behavior ...  Read More

Catalysis
Amoco CD commercial polypropylene catalyst tailor-made for the Amoco-Chisso gas phase process

Gregory G. Arzoumanidis

Volume 1, Issue 2 , December 2014, , Pages 131-137

https://doi.org/10.22063/poj.2014.1098

Abstract
  The commercial profile of the Amoco CD MgCl2 supported polypropylene catalyst is presented. The development, the unique method of preparation/production, with emphasis on particle morphology, and the parameters affecting particle size (PS), particle size distribution (PSD), and particle shape ...  Read More

Structure and property relationship
Evaluation of hydrophilic properties of acrylonitrile/acrylic acid copolymer films dendrigrafted with citric acid

Somaye Akbari; Niloofar Eslahi; Mohammad Haghighat Kish

Volume 4, Issue 2 , June 2017, , Pages 213-220

https://doi.org/10.22063/poj.2017.1436

Abstract
  The present study investigates the hydrophilic properties of acrylonitrile/acrylic acid P(AN/AA) copolymer films with various acrylic acid (AA) contents dendrigrafted with citric acid from zero to fourth generation numbers. It was found that the hydrophilicity of the dendrigrafted films was a complicated ...  Read More