With the collaboration of Iran Polymer Society
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

Polyolefins Industry
Polyolefin and olefin production in Iran: Current and future capacities

Naeimeh Bahri-Laleh; Mehdi Nekoomanesh-Haghighi; Samahe Sadjadi; Ali Pajouhan

Volume 3, Issue 1 , January 2016, , Pages 11-22

https://doi.org/10.22063/poj.2016.1253

Abstract
  Due to easy availability of cheaper raw material and increase in new applications, the use of polyolefins in various industries is becoming a major priority. The Middle East region, on account of its vast oil and gas reserves has, in the last decade or so, been developing many new petrochemical complexes ...  Read More

Reaction engineering
Mathematical modeling the effect of catalyst initial shape and the crack pattern in olefin copolymerization

Marzieh Nouri; Mahmoud Parvazinia; Hassan Arabi; Mohsen Najafi

Volume 2, Issue 2 , June 2015, , Pages 121-133

https://doi.org/10.22063/poj.2015.1165

Abstract
  A two-dimensional (2D) single particle model for the copolymerization of propylene-ethylene with heterogeneous Ziegler-Natta catalyst is developed. The model accounts for the effects of the initial shape of the catalyst and carck/ pore patterns on the copolymer composition, polymerization rate and the ...  Read More

Reaction engineering
Modelling the catalyst fragmentation pattern in relation to molecular properties and particle overheating in olefin polymerization

Mohsen Najafi; Mahmoud Parvazinia; Mir Hamid Reza Ghoreishy

Volume 1, Issue 2 , December 2014, , Pages 77-91

https://doi.org/10.22063/poj.2014.1044

Abstract
  A two-dimensional single particle finite element model was used to examine the effects of particle fragmental pattern on the average molecular weights, polymerization rate and particle overheating in heterogeneous Ziegler-Natta olefin polymerization. A two-site catalyst kinetic mechanism was employed ...  Read More

Catalysis
Storage time effect on dynamic structure of MgCl2.nEtOH adducts in heterogeneous Ziegler-Natta catalysts

Najmeh Hadian; Shokoofeh Hakim; Mehdi Nekoomanesh-Haghighi; Naeimeh bahri-Laleh

Volume 1, Issue 1 , January 2014, , Pages 33-41

https://doi.org/10.22063/poj.2014.904

Abstract
  Primary MgCl2.3.3EtOH adduct (PCT1) was prepared by melt quenching method and then submitted into a programmed thermal dealcoholation project using a fluidized bed reactor. During thermal dealcoholation program, different MgCl2.nEtOH support samples with n= 3.0, 2.7, 2.4, and 2.1 were selected and named ...  Read More