Effect of ligand backbone substituents of nickel ?-diimine complexes on livingness/controllability of olefin polymerization: Competition between monomer isomerization and propagation.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F16%3A43901769" target="_blank" >RIV/60461373:22310/16:43901769 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1002/pola.28206" target="_blank" >http://dx.doi.org/10.1002/pola.28206</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/pola.28206" target="_blank" >10.1002/pola.28206</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of ligand backbone substituents of nickel ?-diimine complexes on livingness/controllability of olefin polymerization: Competition between monomer isomerization and propagation.

Popis výsledku v původním jazyce

Four ?-diimine nickel complexes [(Ar[BOND]N[DOUBLE BOND]C(R)[BOND] C(R)[DOUBLE BOND]N[BOND]Ar)NiBr2; R[DOUBLE BOND]H, CH3, cyclohexane-1,2-diyl, naphthalene-1,8-diyl, Ar[DOUBLE BOND]2,6-i-Pr2-C6H3-) were investigated in propene and hex-1-ene polymerization to identify the limits of backbone substituent R size needed to provide living/controlled ?-olefins polymerization by the sufficient suppression of ?-H elimination transfer. Propagation kinetics measurements, molar mass on monomer conversion dependencies and reinitiation tests were used to evaluate the livingness of hex-1-ene polymerization. Interestingly, living/controlled hex-1-ene polymerization was observed in the case of all diimine derivatives including the one bearing only hydrogen atom in backbone positions. Unexpectedly, in the case of catalysts bearing H and CH3 backbone substituents, we observed the unusual isomerization of hex-1-ene into internal hexenes in parallel with its polymerization. Nevertheless, by subtracting the amount of monomer consumed in isomerization side reaction, polymerization still keeps the features of living/controlled process.

Název v anglickém jazyce

Effect of ligand backbone substituents of nickel ?-diimine complexes on livingness/controllability of olefin polymerization: Competition between monomer isomerization and propagation.

Popis výsledku anglicky

Four ?-diimine nickel complexes [(Ar[BOND]N[DOUBLE BOND]C(R)[BOND] C(R)[DOUBLE BOND]N[BOND]Ar)NiBr2; R[DOUBLE BOND]H, CH3, cyclohexane-1,2-diyl, naphthalene-1,8-diyl, Ar[DOUBLE BOND]2,6-i-Pr2-C6H3-) were investigated in propene and hex-1-ene polymerization to identify the limits of backbone substituent R size needed to provide living/controlled ?-olefins polymerization by the sufficient suppression of ?-H elimination transfer. Propagation kinetics measurements, molar mass on monomer conversion dependencies and reinitiation tests were used to evaluate the livingness of hex-1-ene polymerization. Interestingly, living/controlled hex-1-ene polymerization was observed in the case of all diimine derivatives including the one bearing only hydrogen atom in backbone positions. Unexpectedly, in the case of catalysts bearing H and CH3 backbone substituents, we observed the unusual isomerization of hex-1-ene into internal hexenes in parallel with its polymerization. Nevertheless, by subtracting the amount of monomer consumed in isomerization side reaction, polymerization still keeps the features of living/controlled process.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

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

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Svazek periodika

54

Číslo periodika v rámci svazku

19

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

3193-3202

Kód UT WoS článku

000383679000016

EID výsledku v databázi Scopus

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