With the collaboration of Iran Polymer Society
Olefin polymerization and copolymerization
Homo- and co-polymerization of polar and non-polar olefinic monomers using bicenter cobalt-diimine catalysts

Majedeh Mroofi; Gholamhossein Zohuri; Saeid Ahmadjo; Navid Ramezanian

Volume 11, Issue 2 , May 2024, , Pages 125-136

https://doi.org/10.22063/poj.2024.3593.1300

Abstract
  Bicenter (BCn) cobalt-bis(imine) catalysts were synthesized, used to polymerize methyl methacrylate (MMA), and 1-hexene. The effect of catalyst structure, bridging ligand, and polymerization reaction conditions were investigated. Synthesis of primary ligand of (2,6-dibenzhydryl-4-ethoxyphenyl)-N=(CH3)-C(CH3)=O ...  Read More

Characterization
Determination of gel content of silane cross-linked polyethylene copolymers using FTIR technique

Mehri Dana; Gholam Hossein Zohuri; Navid Ramezanian; Saeid Asadi Shahidi; Sohail Yazdanbakhsh

Volume 11, Issue 1 , February 2024, , Pages 1-10

https://doi.org/10.22063/poj.2023.3474.1277

Abstract
  Silane cross-linking of metallocene-based polyethylene-octene elastomer (POE)/linear low density polyethylene (LLDPE) blend was carried out using two-step Sioplas process in an industrial scale twin-screw extruder. In the study, grafting and cross-linking reactions of vinyl trimethoxy silane (VTMS) were ...  Read More

Polymeric foams
Optimization of acoustic performance of EPDM-based foams using Taguchi design of experiments: Appropriate content of additives

Mohammad Nourmohammadi; Reza Jahanmardi; Hamid Moeenfard; Gholamhossein Zohuri; Saeed Bazgir

Volume 10, Issue 4 , November 2023, , Pages 211-224

https://doi.org/10.22063/poj.2023.3398.1266

Abstract
  Novel EPDM-based polymer foams were prepared using a combination of nanomaterials, namely nano silica, nano clay, and graphene nanoplatelets. In order to achieve optimal acoustic performance, the Taguchi design (TD) technique was applied to reduce the number of experiments and optimize the formulation. ...  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

Catalysis
Study of Ziegler-Natta/(2-PhInd)2ZrCl2 hybrid catalysts performance in slurry propylene polymerization

Gholam-Reza Nejabat; Mehdi Nekoomanesh; Hassan Arabi; Hamid Salehi-Mobarakeh; Gholam-Hossein Zohuri; Mohammad-Mahdi Mortazavi; Saeid Ahmadjo; Stephen A. Miller

Volume 2, Issue 2 , June 2015, , Pages 73-87

https://doi.org/10.22063/poj.2015.1145

Abstract
  Several types of hybrid catalysts are made through mixing of 4th generation Ziegler-Natta (ZN) and (2-PhInd)2ZrCl2  metallocene catalysts using triethylaluminum (TEA) as coupling agent. Response surface methodology (RSM) is used to evaluate the interactive effects of different parameters including ...  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