With the collaboration of Iran Polymer Society
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
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

Polyolefin degradation
Changes in crystallinity of HDPE films containing different amounts of an oxo-biodegradable additive due to UVC exposure

Soheyl Khajehpour-Tadavani; Gholam-Reza Nejabat; Mohammad-Mahdi Mortazavi

Volume 7, Issue 1 , January 2020, Pages 25-32

https://doi.org/10.22063/poj.2019.2468.1135

Abstract
  Crystallinities of high-density polyethylene (HDPE) films containing various amounts of an oxo-biodegradable additive (HES-W) were investigated immediately after preparation and 6 weeks after ultraviolet (UV) irradiation (λ=254 nm). HDPE granules were mixed with oxo-biodegradable masterbatch in ...  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

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