On the topology of highly branched polyethylenes prepared by amine-imine nickel and palladium complexes: the effect of ortho-aryl substituents

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F18%3A43915556" target="_blank" >RIV/60461373:22310/18:43915556 - isvavai.cz</a>

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/full/10.1002/pi.5593" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1002/pi.5593</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/pi.5593" target="_blank" >10.1002/pi.5593</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On the topology of highly branched polyethylenes prepared by amine-imine nickel and palladium complexes: the effect of ortho-aryl substituents

Popis výsledku v původním jazyce

Series of nickel and palladium complexes bearing amine-imine ligands in various ortho-aryl and backbone positions were prepared and investigated in ethene polymerization. Ethene polymerization initiated by symmetrically ortho-substituted nickel and palladium amine-imine catalysts is controlled. Mono-substitution in the ortho-aryl positions of nickel complexes is not as efficient in protecting centers from chain transfer as di-substitution. Both the central metal and the size of the ortho-aryl substituent have a significant effect on the polyethylene (PE) topology. Based on detailed characterization by high temperature SEC-IR-, SEC with multi-angle laser light scattering and C-13 NMR data, PEs prepared by nickel amine-imine complexes have a linear rather than dendritic topology. In contrast, palladium amine-imine complexes with small ortho-aryl substituents at low ethene pressure were shown for the first time to form dendritic PEs with topology comparable to PEs formed by -diimine palladium catalyst. (c) 2018 Society of Chemical Industry

Název v anglickém jazyce

On the topology of highly branched polyethylenes prepared by amine-imine nickel and palladium complexes: the effect of ortho-aryl substituents

Popis výsledku anglicky

Series of nickel and palladium complexes bearing amine-imine ligands in various ortho-aryl and backbone positions were prepared and investigated in ethene polymerization. Ethene polymerization initiated by symmetrically ortho-substituted nickel and palladium amine-imine catalysts is controlled. Mono-substitution in the ortho-aryl positions of nickel complexes is not as efficient in protecting centers from chain transfer as di-substitution. Both the central metal and the size of the ortho-aryl substituent have a significant effect on the polyethylene (PE) topology. Based on detailed characterization by high temperature SEC-IR-, SEC with multi-angle laser light scattering and C-13 NMR data, PEs prepared by nickel amine-imine complexes have a linear rather than dendritic topology. In contrast, palladium amine-imine complexes with small ortho-aryl substituents at low ethene pressure were shown for the first time to form dendritic PEs with topology comparable to PEs formed by -diimine palladium catalyst. (c) 2018 Society of Chemical Industry

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

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Polymer International

ISSN

0959-8103

e-ISSN

—

Svazek periodika

67

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

946-956

Kód UT WoS článku

000435099200017

EID výsledku v databázi Scopus

—