With the collaboration of Iran Polymer Society
Structure and property relationship
Influence of annealing on anisotropic crystalline structure of HDPE cast films

Ali Yadegari; Jalil Morshedian; Hossein-Ali Khonakdar; Udo Wagenknecht

Volume 3, Issue 1 , January 2016, Pages 1-9

https://doi.org/10.22063/poj.2016.1269

Abstract
  High density polyethylene (HDPE) films were produced using cast film extrusion process with different draw ratios, ranging from 16.9 to 148.8. Morphology, crystallinty and orientation state of crystalline and amorphous phases of the cast films were investigated using scanning electron microscopy (SEM), ...  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

Catalysis
Phillips catalysts synthesized over various silica supports: Characterization and their catalytic evaluation in ethylene polymerization

Ebrahim Ahmadi; Zahra Mohamadnia; Sajjad Rahimi; Mohammad Hasan Armanmehr; Mohammad Hossein Heydari; Mahmood Razmjoo

Volume 3, Issue 1 , January 2016, Pages 23-36

https://doi.org/10.22063/poj.2016.1268

Abstract
  Ethylene polymerization was carried out using Phillips chromium catalyst based on silica supports such as silica aerogel, SiO2 (Grace 643), and titanium modified SiO2 (G 643), and the results were compared with other catalysts based on SiO2 (Aldrich), SBA-15(Hex), SBA-15(Sp) and MCM-41. A combination ...  Read More

Characterization
Expected nucleation effects of carboxylic acid salts on poly(1-butene)

Tao Zheng; Qian Li; Qian Zhou; Huayi Li; Qian Xing; Liaoyun Zhang; Youliang Hu

Volume 3, Issue 1 , January 2016, Pages 37-45

https://doi.org/10.22063/poj.2016.1264

Abstract
  9,10-Dihydro-9,10-ethano-anthracene-11,12-dicarboxylic acid disodium salt (DHEAS) was synthesized and used as a nucleating agent for poly(1-butene) (iPB). The isothermal crystallization kinetics of iPB having different nucleating agents were investigated by differential scanning calorimetry (DSC) and ...  Read More

Catalysis
Probing into morphology evolution of magnesium ethoxide particles as precursor of Ziegler-Natta catalysts

Goond Hongmanee; Patchanee Chammingkwan; Toshiaki Taniike; Minoru Terano

Volume 3, Issue 1 , January 2016, Pages 47-57

https://doi.org/10.22063/poj.2016.1266

Abstract
  Mg(OEt)2 with spherical morphology is one of the most important precursors for the preparation of industrial Ziegler-Natta catalysts. In the present article, morphology evolution of Mg(OEt)2 particles is studied in the course of the synthesis. The morphology of Mg(OEt)2 particles is observed throughout ...  Read More

Polyolefin degradation
Biodegradation of PP films modified with organic pro-degradant: natural ageing and biodegradation in soil in respirometric test

Larissa Montagna; Andre Luis Catto; Maria Madalena Forte; Ruth Marlene Santana

Volume 3, Issue 1 , January 2016, Pages 59-68

https://doi.org/10.22063/poj.2016.1279

Abstract
  In this study, PP films were modified with an organic pro-degradant in different concentrations (1, 2 and 3 wt.%), exposed in the first step of degradation to natural ageing for 100 days followed by biodegradation in simulated soil in the respirometric test for 100 days. At the end of the combined degradation ...  Read More