With the collaboration of Iran Polymer Society
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

Copolymerization of ethylene with norbornene by using metallocene/TIBA/B(C6F5)3 system

Wei Wang; Shuzhang Qu; Xinwei Li; Jian Chen; Xiaolei Wang; Cui Zheng; Min Guo; Ying Wang

Volume 10, Issue 2 , May 2023, Pages 71-77

https://doi.org/10.22063/poj.2022.3289.1245

Abstract
  Cyclic olefin copolymer is a type of high-performance polyolefin material, which is prepared by using a single-site catalyst in solution polymerization. The common activator of this system is alkyl aluminoxane or organic  boron/aluminum system. Among them, organic boron is mostly triphenylcarbenium ...  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
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

Computational chemistry & molecular modeling
Exploring the possibility of chemisorption of ethylene on graphene with and without defects

Parisa Alamdari; Farhad Sharif; Saeedeh Mazinani

Volume 10, Issue 2 , May 2023, Pages 101-115

https://doi.org/10.22063/poj.2023.3316.1254

Abstract
  The effect of structural defects on graphene interaction with other molecules is of high interest. In this study, the interaction of ethylene molecules with pristine graphene (PG) and defective graphenes including single (SVG) and double (DVG) vacancies, were investigated using dispersion-corrected periodic ...  Read More

Membrane
Effects of the nozzle arrangement and aerator configuration in slug bubble production to enhance the foulant removal from a flat sheet membrane bioreactor

Nazila Sutudehnezhad; Amir Heydarinasab; Reza Yegani; Farshid Pajoum Shariati

Volume 10, Issue 2 , May 2023, Pages 117-126

https://doi.org/10.22063/poj.2023.3364.1260

Abstract
  Membrane bioreactors (MBRs) are high-tech systems for water recycling and reusing of unconventional water resources such as municipal wastewater. However, the fouling of polymeric membranes is the main impediment to the market development of MBR. The polyolefin-based membranes are subjected to more severe ...  Read More