With the collaboration of Iran Polymer Society
Olefin polymerization and copolymerization
Synthesizing polypropylene with percolation network catalyzed by inorganic nanoparticles-functionalized Ziegler-Natta catalyst

Tingting Yang; Ao Li; Yawei Qin; Jin-Yong Dong

Volume 11, Issue 2 , May 2024, , Pages 83-93

https://doi.org/10.22063/poj.2024.3519.1284

Abstract
  Polypropylene is one of the most widely used synthetic resins, which is mainly synthesized with Ziegler-Natta catalysts. In this paper, the functionalized Ziegler-Natta catalyst is applied to prepare high-performance polypropylene. A new way to synthesize functionalized Ziegler-Natta catalysts is to ...  Read More

Characterization
Chemical state analysis of magnesium-supported Ziegler-Natta catalyst by soft X-ray emission spectrometer (SXES) after contact with alkyl aluminum

Masayoshi Saito; Hiroshi Kashimura; Takuo Kataoka; Masahide Murata; Yusuke Sakuda; Hiroyuki Yamada; Hideyuki Takahashi

Volume 11, Issue 2 , May 2024, , Pages 115-124

https://doi.org/10.22063/poj.2024.3557.1292

Abstract
  This report is on the characterization of active Ti center in heterogeneous Ziegler-Natta catalysts with Soft X-ray Emission Spectrometer (SXES). Since titanium in the catalyst has various chemical bonds, it is important to grasp the chemical bond state. The outermost shell electrons are very important ...  Read More

Catalysis
Characterization of phthalate internal donor in MgCl2 supported Ziegler-Natta catalyst by solid state 13C NMR

Masayoshi Saito; Toshiya Uozumi; Masahide Murata; Takuo Kataoka; Riichiro Chujo

Volume 9, Issue 2 , July 2022, , Pages 117-127

https://doi.org/10.22063/poj.2022.3073.1209

Abstract
  Ziegler-Natta catalyst for propylene polymerization, which TiCl4 and di-alkyl phthalate were supported on MgCl2, was analyzed by solid state 13C NMR. It was confirmed that the spin-lattice relaxation time (“relaxation time” hereafter) of carbonyl group in phthalate was shortened with ...  Read More

Structure and property relationship
The relationship among changes in microstructure, active sites behavior and properties in the propylene polymerization with a 4th generation Ziegler-Natta catalyst

Shokoufeh Hakim; Mehdi Nekoomanesh; Ali Shahrokhinia

Volume 6, Issue 2 , June 2019, , Pages 139-150

https://doi.org/10.22063/poj.2019.2337.1127

Abstract
  Three polypropylene samples (1-3) were synthesized with a 4th generation Ziegler-Natta catalyst in the presence of cyclohexyldimethoxymethylsilane (donor c), dicyclopenthyldimethoxysilane (donor d) and diisopropyldimethoxysilane (donor p), respectively, as external electron donors. The physical properties ...  Read More

Catalysis
Effects of Ti/Mg molar ratio on bi-supported SiO2/MgCl2 (ethoxide type)/TiCl4 catalysts in ethylene homopolymerization and ethylene/1-hexene copolymerization

Liang Zhu; Xuelian He; Ruihua Cheng; Zhen Liu; Ning Zhao; Boping Liu

Volume 5, Issue 1 , January 2018, , Pages 1-13

https://doi.org/10.22063/poj.2017.1470

Abstract
  SiO2/MgCl2 (ethoxide type)/TiCl4 Ziegler-Natta catalysts for use in ethylene polymerization and ethylene/1-hexene copolymerization have been prepared using silica with a supported layer of magnesium ethoxide (Mg(OEt)2) as a catalyst precursor, followed by treating with TiCl4 at different Ti/Mg ...  Read More

Catalysis
Production of titanium tetrachloride (TiCl4) from titanium ores: A review

Hossein Bordbar; Ali Akbar Yousefi; Hossein Abedini

Volume 4, Issue 2 , June 2017, , Pages 149-173

https://doi.org/10.22063/poj.2017.1453

Abstract
  Titanium (Ti) is the ninth most abundant element on earth. The titanium mineral ores are widely distributed in different parts of the world. The two main ores of titanium include rutile (TiO2) and ilmenite (FeO.TiO2). It is aimed to provide the readers with an insight to the main processes currently ...  Read More

Catalysis
Imido-modified SiO2-supported Ti/Mg Ziegler-Natta catalysts for ethylene polymerization and ethylene/1-hexene copolymerization

Ting Fu; Ruihua Cheng; Xuelian He; Zhen Liu; Zhou Tian; Boping Liu

Volume 3, Issue 2 , June 2016, , Pages 103-117

https://doi.org/10.22063/poj.2016.1331

Abstract
  A novel imido-modified SiO2-supported Ti/Mg Ziegler-Natta catalyst for ethylene and ethylene/1-hexene polymerization is investigated. The catalyst is prepared by modification of (SiO2/MgO/MgCl2)TiClx Ziegler-Natta catalysts via supporting vanadium species followed by reaction with p-tolyl isocyanate ...  Read More

Characterization
Evaluation of continuous and discrete melting endotherms in determination of structural heterogeneities in Ziegler-Natta catalyzed linear low density polyethylene

Mostafa Ahmadi; Seyed Mohammad Mehdi Mortazavi; Saeid Ahmadjo; Majid Zahmati; Khosrow Valieghbal; Davoud Jafarifar; Reza Rashedi

Volume 3, Issue 2 , June 2016, , Pages 135-146

https://doi.org/10.22063/poj.2016.1332

Abstract
  Ethylene / 1-butene copolymers at different comonomer levels were synthesized using Ziegler-Natta catalyst to evaluate the applicability of thermal fractionation methods in predicting chemical composition distribution (CCD). The continuous melting endotherms by DSC were converted to continuous CCD, and ...  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