Propylene Polymerization over Titanium-Magnesium Catalyst

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Propylene Polymerization over Titanium-Magnesium Catalyst : Effect of Hydrogen on the Content of Active Centers with Different Stereospecificity and Their Reactivity in Propagation Reaction. / Sukulova, V. V.; Barabanov, A. A.; Matsko, M. A. et al.

In: Applied Catalysis A: General, Vol. 607, 117836, 25.10.2020.

Research output: Contribution to journal › Article › peer-review

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@article{c60ec1c2d8c14f47ad31d9595e894131,

title = "Propylene Polymerization over Titanium-Magnesium Catalyst: Effect of Hydrogen on the Content of Active Centers with Different Stereospecificity and Their Reactivity in Propagation Reaction",

abstract = "This paper presents data on the number of active centers (CPi) with different stereospecificity and the values of propagation rate constant (kPi) for these centers in the propylene polymerization over supported titanium-magnesium catalyst in the presence or absence of hydrogen. The indicated data were obtained by quenching the polymerization with radioactive carbon monoxide (14CO) with subsequent fractionation of the produced polymers by the TREF method into separate fractions differing in stereospecificity and estimation of the CPi and kPi values, which determine the formation of these fractions. The propagation rate constants calculated for active centers with different stereospecificity increase in the following order: kP(aspecific) ≈ kP(low isospecific) < kP(isospecific) < kP(highly isospecific).",

keywords = "ation, Effect of hydrogen in propylene polymerization, Number of active centers, Propagation rate constant, Stereospecific propylene polymerization, Titanium-magnesium (Ziegler–Natta) catalysts, TREF–Temperature Rising Elution Fraction, NUMBER, ACTIVATION, OLEFIN POLYMERIZATION, INITIAL-STAGE, STOPPED-FLOW, ETHYLENE, Titanium-magnesium (Ziegler-Natta) catalysts, RATE CONSTANTS, SITES, ZIEGLER-NATTA CATALYSTS, PROPENE POLYMERIZATION, TREF-Temperature Rising Elution Fraction ation",

author = "Sukulova, {V. V.} and Barabanov, {A. A.} and Matsko, {M. A.} and Zakharov, {V. A.}",

year = "2020",

month = oct,

day = "25",

doi = "10.1016/j.apcata.2020.117836",

language = "English",

volume = "607",

journal = "Applied Catalysis A: General",

issn = "0926-860X",

publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Propylene Polymerization over Titanium-Magnesium Catalyst

T2 - Effect of Hydrogen on the Content of Active Centers with Different Stereospecificity and Their Reactivity in Propagation Reaction

AU - Sukulova, V. V.

AU - Barabanov, A. A.

AU - Matsko, M. A.

AU - Zakharov, V. A.

PY - 2020/10/25

Y1 - 2020/10/25

N2 - This paper presents data on the number of active centers (CPi) with different stereospecificity and the values of propagation rate constant (kPi) for these centers in the propylene polymerization over supported titanium-magnesium catalyst in the presence or absence of hydrogen. The indicated data were obtained by quenching the polymerization with radioactive carbon monoxide (14CO) with subsequent fractionation of the produced polymers by the TREF method into separate fractions differing in stereospecificity and estimation of the CPi and kPi values, which determine the formation of these fractions. The propagation rate constants calculated for active centers with different stereospecificity increase in the following order: kP(aspecific) ≈ kP(low isospecific) < kP(isospecific) < kP(highly isospecific).

AB - This paper presents data on the number of active centers (CPi) with different stereospecificity and the values of propagation rate constant (kPi) for these centers in the propylene polymerization over supported titanium-magnesium catalyst in the presence or absence of hydrogen. The indicated data were obtained by quenching the polymerization with radioactive carbon monoxide (14CO) with subsequent fractionation of the produced polymers by the TREF method into separate fractions differing in stereospecificity and estimation of the CPi and kPi values, which determine the formation of these fractions. The propagation rate constants calculated for active centers with different stereospecificity increase in the following order: kP(aspecific) ≈ kP(low isospecific) < kP(isospecific) < kP(highly isospecific).

KW - ation

KW - Effect of hydrogen in propylene polymerization

KW - Number of active centers

KW - Propagation rate constant

KW - Stereospecific propylene polymerization

KW - Titanium-magnesium (Ziegler–Natta) catalysts

KW - TREF–Temperature Rising Elution Fraction

KW - NUMBER

KW - ACTIVATION

KW - OLEFIN POLYMERIZATION

KW - INITIAL-STAGE

KW - STOPPED-FLOW

KW - ETHYLENE

KW - Titanium-magnesium (Ziegler-Natta) catalysts

KW - RATE CONSTANTS

KW - SITES

KW - ZIEGLER-NATTA CATALYSTS

KW - PROPENE POLYMERIZATION

KW - TREF-Temperature Rising Elution Fraction ation

UR - http://www.scopus.com/inward/record.url?scp=85091556690&partnerID=8YFLogxK

U2 - 10.1016/j.apcata.2020.117836

DO - 10.1016/j.apcata.2020.117836

M3 - Article

AN - SCOPUS:85091556690

VL - 607

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

SN - 0926-860X

M1 - 117836

ER -

ID: 25688782

Propylene Polymerization over Titanium-Magnesium Catalyst: Effect of Hydrogen on the Content of Active Centers with Different Stereospecificity and Their Reactivity in Propagation Reaction

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