Copolymerization of Ethylene with Styrene: Design of Efficient Transition Metal Complex Catalysts

Nomura, Kotohiro

doi:10.1002/9780470557006.ch5

Cited by 3 publications

(3 citation statements)

References 51 publications

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“…Later efficient systems based on (cyclopentadienyl)(aryloxy) titanium(IV) have been deeply investigated by the Nomura group ( Figure 1 f) [ 9 , 10 , 11 ]. The same author achieved the living ethylene–styrene copolymerization by using a (cyclopentadienyl)(ketimide) titanium (IV) complex activated by MAO ( Figure 1 g) [ 12 ].…”

Section: Ethylene–styrene Copolymerizationsmentioning

confidence: 99%

Olefin–Styrene Copolymers

2016

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Abstract:In this review are reported some of the most relevant achievements in the chemistry of the ethylene-styrene copolymerization and in the characterization of the copolymer materials. Focus is put on the relationship between the structure of the catalyst and that of the obtained copolymer. On the other hand, the wide variety of copolymer architecture is related to the properties of the material and to the potential utility.

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Section: Ethylene–styrene Copolymerizationsmentioning

confidence: 99%

Olefin–Styrene Copolymers

2016

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“…On the other hand, polyinsertion homogeneous catalysis has opened the door for copolymerizing ethylene and styrene to produce chain architectures that are very different both in terms of monomers sequence and stereoregularity [10,11,12,13,14,15,16,17,18,19,20,21,22,23]. Recently, some of us succeeded in the synthesis of an ethylene-styrene block copolymer with a isotactic styrene sequence joined to an ethylene-alt-styrene isotactic sequence [24].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Syndiotactic Polystyrene-Polyethylene Block Copolymer

Lamparelli

Speranza

Camurati³

et al. 2019

Polymers

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The direct synthesis of syndiotactic polystyrene-block-polyethylene copolymer (sPS-b-PE) with a diblock structure has been achieved. The synthetic strategy consists of the sequential stereocontrolled polymerization of styrene and ethylene in the presence of a single catalytic system: cyclopentadienyltitanium(IV) trichloride activated by modified methylaluminoxane (CpTiCl3/MMAO). The reaction conditions suitable for affording the partially living polymerization of these monomers were identified, and the resulting copolymer, purified from contaminant homopolymers, was fully characterized. Gel permeation chromatography coupled with two-dimensional NMR spectroscopy COSY, HSQC, and DOSY confirmed the block nature of the obtained polymer, whose thermal behaviour and thin film morphology were also investigated by differential scanning calorimetry, powder wide angle x-ray diffraction, and atomic force microscopy.

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“…This step is followed by alkylation of the Ti center, likely transfer of one alkyl group from Ti to Al to form a Ti(III) + cation (for example, CpTiCl 2 + MAO → [CpTiMe] + [Me-MAO] − ), and styrene coordination/insertion into a remaining Ti-alkyl bond. A neutral Ti(III) active species has also been proposed. − The active center formation mechanism for Group IV metallocene/MAO-mediated ethylene and propylene polymerizations is different. In the latter case, the (+4) transition metal precursor is alkylated and rendered cationic to form the active center without change of oxidation state (for example, Cp 2 ZrCl 2 + MAO → [Cp 2 ZrMe] + [Me-MAO] − ).…”

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Discovery of Syndiotactic Polystyrene: Its Synthesis and Impact

Baugh

Schulz

2020

Macromolecules

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This Editorial discusses two seminal Macromolecules publications by Ishihara et al. concerning the synthesis of syndiotactic polystyrene. In a 1986 communication (Macromolecules 1986(Macromolecules , 19, 2464, the first preparation of this semicrystalline polymer was reported. A 1988 full paper (Macromolecules 1988, 21, 3356) described the enabling polymerization catalyst system, based on methylaluminoxane-activated half-metallocene titanium complexes. These two highly cited publications inspired a large body of research concerning the synthesis, structure, properties, and applications of this new polymer.

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Copolymerization of Ethylene with Styrene: Design of Efficient Transition Metal Complex Catalysts

Cited by 3 publications

References 51 publications

Olefin–Styrene Copolymers

Olefin–Styrene Copolymers

Synthesis and Characterization of Syndiotactic Polystyrene-Polyethylene Block Copolymer

Discovery of Syndiotactic Polystyrene: Its Synthesis and Impact

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