With the collaboration of Iran Polymer Society
Polyolefin degradation
Photo-aging changes in mechanical properties of high impact polystyrene, polystyrene-based binary and compatibilized ternary blends

Marzieh Alidadi-Shamsabadi; Shirin Shokoohi; Mahnaz Shahzamani; Homa Abbasian-Peykani

Volume 12, Issue 1 , February 2025, , Pages 45-52

https://doi.org/10.22063/poj.2025.35539.1323

Abstract
   In this work, the photo-aging behavior of high impact polystyrene (HIPS), polystyrene/ethylene propylene diene monomer (PS/EPDM) binary blends, and compatibilized polystyrene/ethylene propylene diene monomer/ polyamide 6 (PS/EPDM/PA6) ternary blends was studied and compared together. Photo-degradation ...  Read More

Polyolefin degradation
Thermal and tensile behavior of LLDPE films containing limited amounts of an oxo-biodegradable additive and/or amorphous poly(1-hexene) before and after UV irradiation

Sara Zarei; Gholam-Reza Nejabat; Mohammad-Mahdi Mortazavi; Soheyl KhajehPour-Tadavani

Volume 7, Issue 2 , July 2020, , Pages 111-119

https://doi.org/10.22063/poj.2020.2611.1149

Abstract
  Varying amounts of an amorphous poly(1-hexene) (PH, Mv 1.7×106 Da) were added to an LLDPE matrix containing 3% w/w Addiflex oxo-biodegradable additive (HES-W) and extruded and converted into films. Then the effect of presence of PH was investigated on microstructure, thermal and tensile behavior ...  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

Polyolefin degradation
Thermal behavior of ethylene/1-octene copolymer fractions at high temperatures: Effect of hexyl branch content

Abbas Kebritchi; Mehdi Nekoomanesh; Fereidoun Mohammadi; Hossein Khonakdar; Udo Wagenknecht

Volume 6, Issue 2 , June 2019, , Pages 127-138

https://doi.org/10.22063/poj.2019.2295.1123

Abstract
  In this work, the effect of hexyl branch content on thermal behavior of a fractionated ethylene/1-octene copolymer with emphasis on high temperatures was investigated. The ethylene/1-octene copolymer was carefully fractionated to different fractions with homogenous hexyl branch (HB) content by preparative ...  Read More

Polyolefin degradation
Effect of temperature, heating rate and zeolite-based catalysts on the pyrolysis of high impact polystyrene (HIPS) waste to produce fuel-like products

Zaher Tamri; Ali Vaziri Yazdi; Mehdi Nekoomanesh Haghighi; Mehrdad Seifali Abbas-Abadi; Amir Heidarinasab

Volume 6, Issue 1 , January 2019, , Pages 43-52

https://doi.org/10.22063/poj.2018.2189.1114

Abstract
  Pyrolysis of high impact polystyrene (HIPS) waste has been investigated under different process parameters, such as temperature, heating rate and types of zeolitic catalysts to produce valuable liquid products. Liquid, gas and coke as products of pyrolysis and aromatic, naphthene, olefin and paraffin ...  Read More

Polyolefin degradation
Anti-fouling behaviors of surface functionalized high density polyethylene membrane in microfiltration of bovine serum albumin protein

Milad Fonouni; Reza Yegani; Sattar Anarjani; Akram Tavakoli

Volume 4, Issue 1 , January 2017, , Pages 13-26

https://doi.org/10.22063/poj.2016.1343

Abstract
  An essential characteristic for high performance inherently hydrophobic membranes such as microporous high density polyethylene (HDPE) membranes is to have a hydrophilic surface. In this project, wet chemical functionalization as a facile and effective method was developed to give a hydrophilic property ...  Read More

Polyolefin degradation
Evaluation of effects of thymolphthalein on thermooxidative stability of polypropylene

Nikoo Karami; Reza Jahanmardi

Volume 4, Issue 1 , January 2017, , Pages 79-86

https://doi.org/10.22063/poj.2016.1394

Abstract
  The present work is aimed to find a new and efficient type of antioxidants for polypropylene. Hence, effects of 3,3-bis(4-hydroxy-2-methyl-5-propan-2-ylphenyl)-2-benzofuran-1-one, generally known as thymolphthalein, on thermo-oxidative stability of polypropylene in solid and melt states were evaluated ...  Read More

Polyolefin degradation
Comparative study of degradation of PP modified with organic pro-degradant subjected to natural and artificial ageing

Larissa Stieven Montagna; Ana Paula Testa Pezzin; Maria Madalena Forte; Ruth Marlene Santana

Volume 3, Issue 2 , June 2016, , Pages 93-101

https://doi.org/10.22063/poj.1999.1340

Abstract
  In abiotic degradation the action of light radiation is one of the most important parameters, because polymers undergo degradation due to the action of light (natural or artificial). The aim of this study was to investigate the degradation rate for samples of polypropylene (PP) modified with an organic ...  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

Polyolefin degradation
Estimation of pyrolysis product of LDPE degradation using different process parameters in a stirred reactor

Mehrdad Seifali Abbas-Abadi; Mehdi Nekoomanesh Haghighi; Armando G. McDonald; Hamid Yeganeh

Volume 2, Issue 1 , January 2015, , Pages 39-47

https://doi.org/10.22063/poj.2015.1102

Abstract
  Pyrolysis of low density polyethylene (LDPE) by equilibrium fluid catalytic cracking (FCC) was studied in a stirred reactor under different process parameters. In this work, the effect of process parameters such as degradation temperature (420-510°C), catalyst/polymer ratio (0-60%), carrier gas type ...  Read More

Polyolefin degradation
The role of 1-hexene comonomer content in thermal behavior of medium density polyethylene (MDPE) synthesized using Phillips catalyst

Abbas Kebritchi; Mehdi Nekoomanesh; Fereidoon Mohammadi; Hossein Ali Khonakdar

Volume 1, Issue 2 , December 2014, , Pages 117-129

https://doi.org/10.22063/poj.2014.1099

Abstract
  In this work, the role of comonomer content of 1-hexene-medium density polyethylene (MDPE) copolymer, synthesized using Phillips catalyst, on thermal behavior parameters such as: crystallization, melting temperature and thermal degradation was investigated in detail. The copolymer was fractionated to ...  Read More

Catalysis
In situ stabilization of polypropylene by lignin using a Ziegler-Natta catalyst

Maria Marques; Renato Oliveira; Rafael Araujo; Bruno Amantes

Volume 1, Issue 1 , January 2014, , Pages 17-24

https://doi.org/10.22063/poj.2014.889

Abstract
  A fourth-generation Ziegler-Natta catalyst was prepared to synthesize polypropylene (PP), which was stabilized by in situpolymerization employing lignin as antioxidant. The antioxidant properties of lignin were compared with those of the commercial antioxidant Irganox 1010. The presence of lignin in ...  Read More