alpha-keto-beta-diimine nickel-catalyzed olefin polymerization: Effect of ortho-aryl substituents and preparation of stereoblock copolymers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43913689" target="_blank" >RIV/60461373:22310/17:43913689 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/17:10361117

Výsledek na webu

<a href="http://onlinelibrary.wiley.com/doi/10.1002/pola.28206/full" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1002/pola.28206/full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/pola.28631" target="_blank" >10.1002/pola.28631</a>

Jazyk výsledku

angličtina

Název v původním jazyce

alpha-keto-beta-diimine nickel-catalyzed olefin polymerization: Effect of ortho-aryl substituents and preparation of stereoblock copolymers

Popis výsledku v původním jazyce

A series of -keto--diimine nickel complexes (Ar-N=C(CH3)-C(O)-C(CH3)=N-Ar)NiBr2; Ar=2,6-R-C6H3-, R=Me, Et, iPr, and Ar=2,4,6-Me-3-C6H3-) was prepared. All corresponding ligands are unstable even under an inert atmosphere and in a freezer. Stable copper complex intermediates of ligand synthesis and ethyl substituted nickel complex were isolated and characterized by X-ray. All nickel complexes were used for the polymerization of ethene, propylene, and hex-1-ene to investigate their livingness and the extent of chain-walking. Low-temperature propene polymerization with less bulky ortho-substituents was less isospecific than the one with isopropyl derivative. Propene stereoblock copolymers were prepared by iPr derivative combining the polymerization at low temperature to prepare isotactic polypropylene (PP) block and at a higher temperature, supporting chain-walking, to obtain amorphous regioirregular PP block. Alternatively, a copolymerization of propene with ethene was used for the preparation of amorphous block. (c) 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 2440-2449

Název v anglickém jazyce

alpha-keto-beta-diimine nickel-catalyzed olefin polymerization: Effect of ortho-aryl substituents and preparation of stereoblock copolymers

Popis výsledku anglicky

A series of -keto--diimine nickel complexes (Ar-N=C(CH3)-C(O)-C(CH3)=N-Ar)NiBr2; Ar=2,6-R-C6H3-, R=Me, Et, iPr, and Ar=2,4,6-Me-3-C6H3-) was prepared. All corresponding ligands are unstable even under an inert atmosphere and in a freezer. Stable copper complex intermediates of ligand synthesis and ethyl substituted nickel complex were isolated and characterized by X-ray. All nickel complexes were used for the polymerization of ethene, propylene, and hex-1-ene to investigate their livingness and the extent of chain-walking. Low-temperature propene polymerization with less bulky ortho-substituents was less isospecific than the one with isopropyl derivative. Propene stereoblock copolymers were prepared by iPr derivative combining the polymerization at low temperature to prepare isotactic polypropylene (PP) block and at a higher temperature, supporting chain-walking, to obtain amorphous regioirregular PP block. Alternatively, a copolymerization of propene with ethene was used for the preparation of amorphous block. (c) 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 2440-2449

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GC15-15887J" target="_blank" >GC15-15887J: KATALYZÁTORY PRO ŘÍZENÉ VĚTVENÍ POLYOLEFINŮ. PROPOJENÍ TEORIE A EXPERIMENTU.</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of polymer science. Part A, Polymer chemistry

ISSN

0887-624X

e-ISSN

—

Svazek periodika

55

Číslo periodika v rámci svazku

15

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

2440-2449

Kód UT WoS článku

000403815500003

EID výsledku v databázi Scopus

—