With the collaboration of Iran Polymer Society
Olefin polymerization and copolymerization
Tailoring polypropylene properties by package of internal/external donor in Ziegler Natta catalysts

Nona Ghasemi Hamedani; Fatemeh Poorsank; Hassan Arabi; Seyed Mehdi Ghafelehbashi

Volume 11, Issue 4 , December 2024, , Pages 255-263

https://doi.org/10.22063/poj.2024.35557.1328

Abstract
  Insights have been developed into the influence of different structures, including bismethoxymethylfluorene (B) and 2,2-diisopropyl succinate (I), on both internal donor (ID) and external donor (ED) roles on the performance of MgCl2/ID/TiCl4. Catalyst performance including activity, hydrogen response, ...  Read More

Olefin polymerization and copolymerization
Synthesizing polypropylene with percolation network catalyzed by inorganic nanoparticles-functionalized Ziegler-Natta catalyst

Tingting Yang; Ao Li; Yawei Qin; Jin-Yong Dong

Volume 11, Issue 2 , May 2024, , Pages 83-93

https://doi.org/10.22063/poj.2024.3519.1284

Abstract
  Polypropylene is one of the most widely used synthetic resins, which is mainly synthesized with Ziegler-Natta catalysts. In this paper, the functionalized Ziegler-Natta catalyst is applied to prepare high-performance polypropylene. A new way to synthesize functionalized Ziegler-Natta catalysts is to ...  Read More

Olefin polymerization and copolymerization
Synthesis of novel styrene-olefin triblock copolymer via living anionic polymerization

Mohammad Reza Jozaghkar; Farshid Ziaee

Volume 11, Issue 2 , May 2024, , Pages 95-101

https://doi.org/10.22063/poj.2024.3544.1290

Abstract
  Innovative strides in polymer synthesis have led to the successful living anionic polymerization of styrene-olefin triblock copolymers, yielding varying molecular weights and a remarkably narrow dispersity (Đ) in cyclohexane solvent at 45°C, initiated by n-butyllithium. The novel approach employs ...  Read More

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

Polymer processing
Ultra-high molecular weight polypropylene (UHMWPP): Synthesis and fiber processing

Parthiv M. Trivedi; Sandip Patil; Virendra K. Gupta

Volume 11, Issue 1 , February 2024, , Pages 21-28

https://doi.org/10.22063/poj.2023.3455.1274

Abstract
  Ultra-high molecular weight polyolefin (UHMWPO) has enormous potential applications due to their excellent mechanical properties such as tensile strength, flexural modulus, toughness and outstanding chemical resistance. But the processing of polyolefin, in particular, UHMWPO fibers cannot be processed ...  Read More

Olefin polymerization and copolymerization
Ultra-high molecular weight polyethylene synthesis using externally modified Si-Mg-Ti based Z-N catalyst system

Hiren Bhajiwala; Virendrakumar Gupta

Volume 11, Issue 1 , February 2024, , Pages 61-70

https://doi.org/10.22063/poj.2023.3483.1279

Abstract
  Ultra-high molecular weight polyethylene (UHMWPE) was synthesized using Bi-supported SiO2/MgCl2/TiCl4 (Si-Mg-Ti) Ziegler-Natta catalyst in conjugation with triethyl aluminum (TEA). The impact of temperature and the presence of a chain-terminating agent were examined in the context of ethylene polymerization. ...  Read More

Olefin polymerization and copolymerization
Influence of reaction conditions on catalytic properties of rac-Et(2-MeInd)2ZrMe2/(2,6-tBu2PhO-)AliBu2 in ethylene-propylene copolymerization

Evgeny E Faingol'd; Stanislav L. Saratovskikh; Andrei N. Panin; Olga N. Babkina; Igor V. Zharkov; Artur T. Kapasharov; Nikita N. Lashmanov; Gennadii V. Shilov; Natalia M. Bravaya

Volume 10, Issue 4 , November 2023, , Pages 205-210

https://doi.org/10.22063/poj.2023.3417.1270

Abstract
  Ethylene-propylene copolymerization reactions were carried out using rac-Et(2-MeInd)2ZrMe2 catalyst and (2,6-tBu2PhO-)AliBu2 as activator under varying reaction conditions. We demonstrate that reaction conditions such as monomer concentration, Al/Zr molar ratio and solvent type (toluene and heptane) ...  Read More

Olefin polymerization and copolymerization
Synthesis of acrylate-1-hexene based functional polyolefin using activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP)

Virendrakumar. Gupta; Hiren Manojkumar Bhajiwala

Volume 10, Issue 4 , November 2023, , Pages 235-242

https://doi.org/10.22063/poj.2023.3449.1272

Abstract
  The copolymerization of methyl acrylate (MA) and glycidyl methacrylate (GMA) with 1-hexene was carried out using activator regenerator by electron transfer atom transfer radical polymerization (ARGET ATRP) employing Cu(0)/CuBr2 as a catalyst, pentamethyl diethylenetriamine (PMDETA) as a ligand, and ethyl ...  Read More

Olefin polymerization and copolymerization
A practical criterion for synthesizing ethylen-1-butene copolymer in powder form in slurry polymerization with a Ziegler-Natta catalyst and predicting its incorporated 1-butene

Mohsen Javaheri; Mehdi Nekoomanesh; Yousef Jahani

Volume 10, Issue 4 , November 2023, , Pages 243-251

https://doi.org/10.22063/poj.2023.3485.1281

Abstract
  The concentration of ethylene and 1-butene in n-hexane as polymerization media was calculated at five different pressure levels (4, 6, 8, 10, and 12 bar) and four different 1-butene concentrations (0.13, 0.26, 0.39, and 0.52 mol/L) in n-hexane at T= 80°C using the Peng-Robinson thermodynamic equation ...  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
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

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
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

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

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

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

Olefin polymerization and copolymerization
Monomer effect on the chain transfer by diethyl zinc in olefin polymerization by metallocene catalysts

Wei Wang; Taoyi Zhang; Liping Hou

Volume 8, Issue 2 , July 2021, , Pages 85-91

https://doi.org/10.22063/poj.2021.2845.1174

Abstract
  The present paper systematically studies the homo- and copolymerization of ethylene or propylene using metallocene as catalyst and diethyl zinc as chain transfer agent to obtain the polyolefin waxes with narrow molecular weight distribution and with a high activity. The molecular weight of the resultant ...  Read More

Olefin polymerization and copolymerization
Competitive particle growth at different conditions of oligo-micelle formation in hydro-alcoholic solution of anionic double-chain emulsifier via batch emulsion polymerization of vinyl chloride

Aliasghar Mahdavi Akerdi; Mehdi Nekoomanesh

Volume 7, Issue 1 , January 2020, , Pages 33-44

https://doi.org/10.22063/poj.2019.2501.1138

Abstract
  The condition of oligo-micelle formation of sodium di-isodecyl sulfosuccinate (SDIDS) emulsifier in hydroalcoholic solutions is used to study particle formation of vinyl chloride emulsion polymerization in a batch reactor. The change on micellization behavior was investigated by critical micelle concentration ...  Read More

Olefin polymerization and copolymerization
Synthesis and identification of polystyrene via conventional and controlled radical polymerization methods: Effect of temperature, initiator and transfer agent on molecular weight and reaction rate

Mojtaba Farrokhi; Mahdi Abdollahi

Volume 6, Issue 1 , January 2019, , Pages 85-94

https://doi.org/10.22063/poj.2018.2288.1122

Abstract
  Polystyrene (PSt) has been known as one of the important polymers with a wide range of applications. Ability to synthesize PSt with different but predictable molecular weights for various applications is very important in the laboratories and industries. In this study, using various simple and inexpensive ...  Read More