The effect of different process parameters on the TiCl4/internal donor/MgCl2/AlEt3 catalytic system using external donor and cyclohexylchloride

Abbas-Abadi, Mehrdad Seifali; Rashedi, Reza; Sepahi, Abdolhannan; Heydari, Leila; Farhadi, Ali; Biglarkhani, Mehdi

doi:10.1007/s13726-020-00829-1

Cited by 9 publications

(7 citation statements)

References 26 publications

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“…In the last four decades, remarkable advances have been achieved in precise controlling of molecular architectures of HDPEs 18 . In fact, the balance of tailored molecular weight and branching distributions make these polymers suitable for different applications 19,20 . This is usually done by careful regulating of H 2 (as transfer agent for molecular weight control) and 1‐butene/1‐hexene (as comonomer for density control) in industry.…”

Section: Introductionmentioning

confidence: 99%

Structure–property relationship in film and blow molding type high‐density polyethylene polymers from a slurry‐process industrial plant

Mansouri

Emami

Yousefi

et al. 2022

J of Applied Polymer Sci

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In this study, the microstructural, flow, and mechanical properties of two commercially available high‐density polyethylene (HDPE) samples with different particle sizes were quantified. Specifically, two different blow molding and film grade HDPEs produced by the same catalyst under different conditions were acquired in powder form after dryer section of an industrial plant. They were fractioned according to their particle sizes into six samples: ≤125, 125–200, 200–315, 315–400, 400–500, and ≥ 500 μm. According to sieve analysis, the film grade (D50 = 304 μm) had larger particle sizes related to the counterpart injection sample (D50 = 289 μm). A peak value in density, bulk density, viscosity molecular weight (Mv), melt flow index (MFI), and comonomer content characteristics was found in the particles with the diameter of 125–200 μm in both samples, indicating extremely non‐homogeneity of these HDPE samples. Chemical composition distribution (CCD) of the as received polymers as well as sieved fractions was surveyed via SSA or TREF analyses. The film sample represented lower MFI and density and higher Mv and comonomer content in all fractions, originated from different reactor conditions during the samples synthesis, which translate into improved mechanical properties comparing with the blow molding sample.

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Section: Introductionmentioning

confidence: 99%

Structure–property relationship in film and blow molding type high‐density polyethylene polymers from a slurry‐process industrial plant

Mansouri

Emami

Yousefi

et al. 2022

J of Applied Polymer Sci

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show abstract

“…Until the 2000s, activation with chlorinated organic compounds was performed mainly for “vanadium” catalysts [ 9 , 10 , 11 , 12 , 13 ]. Recently, an appreciably large number of studies focusing on modification of titanium–magnesium catalysts with chlorinated organic compounds (COCs) have been reported [ 4 , 5 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. The impact of a wide range of different compounds has been evaluated.…”

Section: Introductionmentioning

confidence: 99%

“…The effect of the presence of monochlorinated organic compounds with the number of carbon atoms ranging from 2 to 6 (chloroethylene [ 19 ], chlorobutyl [ 16 , 17 ], chlorocyclopentane [ 4 ], and chlorocyclohexane [ 4 , 5 , 16 , 18 , 20 , 21 ]) on PE polymerization was studied. Among monochlorinated organic compounds, chlorocyclohexane (CHC) exhibits the strongest promoting activity [ 4 , 5 , 16 , 18 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

“…It has been found that, among acyclic compounds, the presence of chlorocyclohexane ensures the best results (better polymer yield, size distribution of PE powder particles (the morphology of polymer powder), higher degree of crystallinity and, therefore, greater melt flow index (MFI) for the resulting polyethylene). Chlorocyclohexane provides highly efficient modification of TMCs containing internal donors based on alcohol and ether moieties [ 18 , 20 ]. Therefore, CHC may be an efficient agent for modifying titanium–magnesium Ziegler–Natta catalysts.…”

Section: Introductionmentioning

confidence: 99%

“…However, in refs. [ 4 , 5 , 14 , 16 , 18 , 20 ], focus has been on the use of CHC during ethylene homopolymerization, and almost no data are available on the effect of COCs on ethylene/α-olefin copolymerization. Most of the food-grade PE brands produced in the world are ethylene/α-olefin copolymers.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Mono- and Multichlorinated Organic Compounds—Chlorocyclohexane and Hexachloro-p-xylene—On the Catalytic Properties of Titanium–Magnesium Catalysts in the Homo- and Copolymerization of Ethylene with 1-Hexene

Салахов

Mikenas

Захаров

et al. 2022

IJMS

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Ethylene polymerization and ethylene/1-hexene copolymerization over the titanium–magnesium catalytic system in the presence of chlorocyclohexane (CHC) and hexachloro-p-xylene (HCPX) has been studied. Modification of TMC with chlorocyclohexane and hexachloro-p-xylene increased catalyst activity severalfold for both ethylene polymerization and ethylene/1-hexene copolymerization. The key kinetic regularities of ethylene homopolymerization and ethylene/1-hexene copolymerization in the presence of CHC and HCPX were determined, and the copolymerization constants were measured. Molecular characteristics and the copolymer composition were determined for the synthesized samples of ethylene homopolymers and ethylene/hexene copolymers. Modification of the titanium–magnesium catalyst with chlorinated organic compounds reduced 1-hexene content in the copolymer; polymerization was sensitive to 1-hexene as a regulator of polymer molecular weight. The potential mode of action of chlorinated organic modifiers on catalytic properties of titanium–magnesium catalyst is discussed.

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Investigation of Optimal Condition of Ethylene Polymerization Using a New Three-Metallic High-Performance Ziegler–Natta Catalyst: Experimental Design and Polymer Characterization

2022

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The effect of different process parameters on the TiCl4/internal donor/MgCl2/AlEt3 catalytic system using external donor and cyclohexylchloride

Cited by 9 publications

References 26 publications

Structure–property relationship in film and blow molding type high‐density polyethylene polymers from a slurry‐process industrial plant

Structure–property relationship in film and blow molding type high‐density polyethylene polymers from a slurry‐process industrial plant

Effect of Mono- and Multichlorinated Organic Compounds—Chlorocyclohexane and Hexachloro-p-xylene—On the Catalytic Properties of Titanium–Magnesium Catalysts in the Homo- and Copolymerization of Ethylene with 1-Hexene

Investigation of Optimal Condition of Ethylene Polymerization Using a New Three-Metallic High-Performance Ziegler–Natta Catalyst: Experimental Design and Polymer Characterization

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