Iron oxide/cassava starch-supported Ziegler–Natta catalysts for in situ ethylene polymerization

Chancharoenrith, Sittikorn; Kamonsatikul, Choavarit; Namkajorn, Montree; Kiatisevi, Supavadee; Somsook, Ekasith

doi:10.1016/j.carbpol.2014.09.080

Cited by 11 publications

(5 citation statements)

References 19 publications

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Section: Resultsmentioning

confidence: 99%

“…The effects of iron on the synthesis of resins have been studied very little and it has been focused mainly on the synthesis of polymeric nanocomposites of high-density polyethylene, where the thermal degradation of the material presents positive changes but not very marked [ 34 , 35 , 36 ]. This is mainly due because other support compounds such as starch are used to guarantee a better distribution of iron on the polymeric matrix and in low concentrations [ 35 ]. Unlike these studies, the iron present in the samples presented came from process residues that are not intentional, nor do they present a support that allows for good interaction with the catalysts during the synthesis of polypropylene, which favors a correct distribution of the molecules of the iron oxide so that the molecules are not affected.…”

Section: Resultsmentioning

confidence: 99%

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Iron Oxide Powder as Responsible for the Generation of Industrial Polypropylene Waste and as a Co-Catalyst for the Pyrolysis of Non-Additive Resins

Hernández‐Fernández

Castro-Suarez

Toloza

2022

IJMS

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For the synthesis of polymeric resins, it is of great importance to review the raw materials and the equipment to be used to avoid the presence of compounds that may affect the effectiveness of the polymerization and the characteristics of the plastic to be obtained. Iron oxide is a compound that can be present in reactors after maintenance due to the techniques used and the cleaning of this equipment, and it can affect the characteristics of the resins, reducing their quality. In this study, the presence of FeO in different concentrations was evaluated to determine its effects on the properties and pyrolysis of polypropylene resins by using X-ray refraction to determine the elements of the samples, evaluating thermal degradation by TGA, the variation in molecular weight by measuring the MFI, and the compounds obtained from pyrolysis by chromatography. The results showed that the thermal degradation decreased as the FeO concentration increased, while for the MFI, the relationship was directly proportional. The evaluation of the compounds obtained from pyrolysis showed an increase in the production of alcohols, alkynes, ketones, and acids, and a decrease in alkanes and alkenes, showing that FeO affects the properties of polypropylene and the compounds that are produced during pyrolysis.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Iron Oxide Powder as Responsible for the Generation of Industrial Polypropylene Waste and as a Co-Catalyst for the Pyrolysis of Non-Additive Resins

Hernández‐Fernández

Castro-Suarez

Toloza

2022

IJMS

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“…2(a)) are indexed to hexagonal carbon (PDF 00-050-0926). The peaks corresponds to 2θ with reflection planes at 14.8° (110), 16.6° (002) and 22.7° (120). The low peak intensity shows that starch is in amorphous phase.…”

Section: Resultsmentioning

confidence: 99%

“…15 It was reported that the fine structure of starch also prevented aggregation of nanoparticles. 16 Among the underutilized starches, sago starch has become popular largely because of the sustainability of the crop. 17 Sago starch is produced from the trunk of sago palm (Metroxylon sagu) which is native to Southeast Asia.…”

Section: Introductionmentioning

confidence: 99%

Starch functionalization of trimetallic W-Mg-Al oxide for oxidative desulphurisation of dibenzothiophene

Kimi¹,

Ngaini²,

Hamdan³

2020

10.5267/j.ccl

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A novel trimetallic W-Mg-Al oxide composites immobilised onto starch were synthesized via sol-gel method. W-Mg-Al oxide composites were synthesized by first preparing WO3 using incipient wetness method, followed by immobilising onto MgO-Al2O3 support using starch as binder. The effects of starch addition on the crystal properties and morphology were investigated by X-ray diffraction (XRD), Fourier Transform Infrared (FT-IR) spectroscopy and Scanning Electron Microscopy (SEM). In the presence of hydrogen peroxide and acetic acid as oxidant system, W-Mg-Al oxide starch composites exhibited higher catalytic performances for oxidative desulphurisation (ODS) of dibenzothiophene (DBT) at 95% compared to W-Mg-Al oxide composites. The catalytic activity observed could be correlated to the distribution of active phases on starch as well as the higher crystallinity of the metal oxide composites.

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“…[1][2][3][4][5] Therefore, many attempts have been focused on blending mass produced polymers (PE, PP etc.) with cheap natural micro-or nano-particles, such as montmorillonite, [6][7][8] starch, [9,10] cellulose [11][12][13] and lignin, [14][15][16] to create new materials with desired properties.…”

Section: Introductionmentioning

confidence: 99%

Preparation of polyethylene/lignin nanocomposites from hollow spherical lignin‐supported vanadium‐based Ziegler–Natta catalyst

Wang

Feng

Zheng

et al. 2016

Polymers for Advanced Techs

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In the present article, a novel hollow spherical lignin‐supported vanadium‐based Ziegler–Natta catalyst was synthesized. The active centers of the obtained catalyst well dispersed in the lignin through the SEM‐EDX analysis. The resultant catalyst was investigated in ethylene polymerization and found to exhibit remarkable catalytic activity upon activation with ethylaluminium sesquichloride cocatalyst and ethyl trichloroacetate activator. During the polymerization, the lignin was gradually exfoliated by the polymerization force arising from the propagation of ethylene chain. The resultant PE/lignin nanocomposites preformed higher thermal stability compared to virgin PE. Copyright © 2016 John Wiley & Sons, Ltd.

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Iron oxide/cassava starch-supported Ziegler–Natta catalysts for in situ ethylene polymerization

Cited by 11 publications

References 19 publications

Iron Oxide Powder as Responsible for the Generation of Industrial Polypropylene Waste and as a Co-Catalyst for the Pyrolysis of Non-Additive Resins

Iron Oxide Powder as Responsible for the Generation of Industrial Polypropylene Waste and as a Co-Catalyst for the Pyrolysis of Non-Additive Resins

Starch functionalization of trimetallic W-Mg-Al oxide for oxidative desulphurisation of dibenzothiophene

Preparation of polyethylene/lignin nanocomposites from hollow spherical lignin‐supported vanadium‐based Ziegler–Natta catalyst

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