Poly(1‐octene) synthesis using high performance supported titanium catalysts

Kaur, Sukhdeep; Naik, Dhananjay G.; Singh, Gurmeet; Patil, Harshad R.; Kothari, Ajay V.; Gupta, Virendra K.

doi:10.1002/app.31090

Cited by 18 publications

(23 citation statements)

References 57 publications

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“…The disappearance of the C-H stretching of vinyl group at 1395 cm À1 and the C = C stretching vibration at 1640 cm À1 confirmed the formation of poly(1-hexene). [20] The 13 C NMR spectrum of a typical poly(1-hexene) prepared with the synthesized catalyst is shown in Fig. 5 ( the other samples showed similar 13 C NMR patterns).…”

Section: Polymerization Of 1-hexene In Bulk Conditionsmentioning

confidence: 91%

“…The chemical shift values of the six carbons of poly (1-hexene) observed are in good agreement with other reports. [4,20,33] The methyl signals are observed in the region of Table 2. 13.00-17.00 ppm. (ω-1)CH 2 carbons of the branches appear at 22.70-23.18 ppm.…”

Section: Polymerization Of 1-hexene In Bulk Conditionsmentioning

confidence: 99%

“…[28] Other chemicals, polymerization procedure, and characterizations were also taken from the literatures. [19,20] Differential scanning calorimetry (DSC) experiments (Universal V4IDTA) with a rate of 10°C.min À1 were used to measure the thermal behaviors of the samples in hermetic aluminum pans. The 13 C nuclear magnetic resonance (NMR) spectra of the polymers were recorded on a Bruker AC-400 spectrometer in a trichlorobenzene solution containing 3% (v/v) C 6 D 6 at 120°C.…”

Section: Characterizationmentioning

confidence: 99%

“…The low field signal for the carbon (C 3 ) can be a result of the polymer configuration and its intensity, and hence, the isotacticity, which varies depending on the stereospecificity of the Ziegler-Natta catalyst used. [20] Thermal properties of the poly(1-hexene)…”

Section: Polymerization Of 1-hexene In Bulk Conditionsmentioning

confidence: 99%

“…[14][15][16][17][18] However, fewer studies have been devoted to the polymerization of higher olefins. [19][20][21][22][23] The microstructure of polymers determines properties and applications of final products which in turn depend on the polymerization conditions like concentration of the cocatalyst, polymerization temperature, and monomer concentrations. [24][25][26] The objective of this work is to synthesize poly(1-hexene) as a PO with desired molecular weights for DRA application.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of ultra high molecular weight amorphous poly(1-hexene) by a Ziegler-Natta catalyst

Ahmadjo

2016

Polym. Adv. Technol.

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High molecular weight polymers such as poly (α-olefin)s play a key role as drag-reducing agents which are commonly used in pipeline industry. Heterogeneous Ziegler-Natta catalyst system of MgCl 2 .nEtOH/TiCl 4 /donor was prepared using a spherical MgCl 2 support and utilized in synthesis of poly(1-hexene)s with a viscosity average molecular weight (M v ) up to 3.5 × 10 3 kDa. The influence of effective parameters including Al/Ti ratio, polymerization temperature, monomer concentration, effect of alkylaluminus type on the productivity, and molecular weight of the products was evaluated. It was suggested that the reactivity of the Al-R group and the bulkiness of the cocatalyst were correlated to the performance of the Ziegler-Natta catalyst at different polymerization time and temperatures, affecting the catalyst activity and M v of polymers. Moreover, bulk polymerization method leads to higher viscosity average molecular weights, revealing the remarkable effect of polymerization method on the chain microstructure. Fourier transform infrared, 13 C Nuclear magnetic resonance spectra, and DSC thermogram of the prepared polymers confirmed the formation of poly(1-hexene). The properties of the polymers measured by vortex test showed that these polymers could be used as a drag-reducing agent. Drag-reducing behaviors of the polymers exhibited a dependence on the M v of the obtained polymers that was changed by variation in polymerization parameters.

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Section: Polymerization Of 1-hexene In Bulk Conditionsmentioning

confidence: 91%

Section: Polymerization Of 1-hexene In Bulk Conditionsmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

Section: Polymerization Of 1-hexene In Bulk Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation of ultra high molecular weight amorphous poly(1-hexene) by a Ziegler-Natta catalyst

Ahmadjo

2016

Polym. Adv. Technol.

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Ziegler–Natta Catalysts

Fan

2018

Encyclopedia of Polymer Science and Technology

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First invented in 1953, Ziegler–Natta catalysts have been used widely in the industrial production of polyolefins and other important polymers since the 1960s. In recent years, polymers synthesized with these catalysts account for more than 30% of the total production of polymers. This article briefly introduces the history and main developments of Ziegler–Natta catalysts and explains their preparation, composition, and mechanism of the catalysis process. Particular emphasis is put on the currently more important MgCl 2 ‐supported Ziegler–Natta catalysts. Main features of the olefin polymerization with MgCl 2 ‐supported Ziegler–Natta catalysts are presented, including the formation and structure of active sites, main reactions with the active sites, origin of stereospecificity, reaction kinetics, and morphology of the nascent polymer particles. The main olefin polymerization processes with these catalysts are also briefly discussed.

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Methyl acrylate/1‐octene copolymers: Lewis acid‐mediated polymerization

Kaur

Singh

Kothari

et al. 2008

J of Applied Polymer Sci

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Copolymerization of methyl acrylate (MA) with 1‐octene (1‐Oct) was conducted in the presence of free radical initiator, 2,2′‐azobis(2‐methylpropionitrile) (AIBN) using heterogeneous Lewis acid, acidic alumina. The polymers obtained were transparent and highly viscous liquids. The copolymer composition calculated from 1H NMR showed alkene incorporation in the range of 10–61%. The monomodal nature of chromatographic curves corresponding to the molecular weight distribution in gel permeation chromatography (GPC) further confirmed that the polymers obtained are true copolymers. The number–average molecular weights (Mn) of the copolymers were in the range of 1.1 × 104–1.6 × 104 with polydispersity index of 1.75–2.29. The effects of varying the acidic alumina amount, time of polymerization, and monomer infeed on the incorporation of 1‐Oct in the polymer chain were studied. Increased 1‐Oct infeed led to its higher inclusion in the copolymer chain as elucidated by NMR. DEPT‐135 NMR spectral analysis was used to explicate the nature of arrangement of monomer sequences in the copolymer chain. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

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Poly(1‐octene) synthesis using high performance supported titanium catalysts

Cited by 18 publications

References 57 publications

Preparation of ultra high molecular weight amorphous poly(1-hexene) by a Ziegler-Natta catalyst

Preparation of ultra high molecular weight amorphous poly(1-hexene) by a Ziegler-Natta catalyst

Ziegler–Natta Catalysts

Methyl acrylate/1‐octene copolymers: Lewis acid‐mediated polymerization

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