Propylene Polymerization over Titanium-Magnesium Catalyst: Effect of Hydrogen on the Content of Active Centers with Different Stereospecificity and Their Reactivity in Propagation Reaction
[Display omitted] •The number of active centers (CPi) with different stereospecificity was found.•Propagation rate constants for such centers (kPi) were calculated.•Effect of hydrogen on the CPi and kPi values was studied.•Portion of “dormant” centers was estimated. This paper presents data on the n...
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| Veröffentlicht in: | Applied catalysis. A, General General, 2020-10, Vol.607, p.117836, Article 117836 |
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| container_title | Applied catalysis. A, General |
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| creator | Sukulova, V.V. Barabanov, A.A. Matsko, M.A. Zakharov, V.A. |
| description | [Display omitted]
•The number of active centers (CPi) with different stereospecificity was found.•Propagation rate constants for such centers (kPi) were calculated.•Effect of hydrogen on the CPi and kPi values was studied.•Portion of “dormant” centers was estimated.
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) |
| doi_str_mv | 10.1016/j.apcata.2020.117836 |
| format | Article |
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•The number of active centers (CPi) with different stereospecificity was found.•Propagation rate constants for such centers (kPi) were calculated.•Effect of hydrogen on the CPi and kPi values was studied.•Portion of “dormant” centers was estimated.
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).</description><identifier>ISSN: 0926-860X</identifier><identifier>EISSN: 1873-3875</identifier><identifier>DOI: 10.1016/j.apcata.2020.117836</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>ation ; Catalysts ; Effect of hydrogen in propylene polymerization ; Fractionation ; Magnesium ; Number of active centers ; Polymerization ; Propagation ; Propagation rate constant ; Propylene ; Rate constants ; Stereospecific propylene polymerization ; Titanium ; Titanium-magnesium (Ziegler–Natta) catalysts ; TREF–Temperature Rising Elution Fraction</subject><ispartof>Applied catalysis. A, General, 2020-10, Vol.607, p.117836, Article 117836</ispartof><rights>2020 Elsevier B.V.</rights><rights>Copyright Elsevier Science SA Oct 25, 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c334t-b2a0e00c810cd90c975d4baeb569ef577bbe6f8dfee2398ea4b5c61568fd1c5b3</citedby><cites>FETCH-LOGICAL-c334t-b2a0e00c810cd90c975d4baeb569ef577bbe6f8dfee2398ea4b5c61568fd1c5b3</cites><orcidid>0000-0003-2808-4325</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.apcata.2020.117836$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,777,781,3537,27905,27906,45976</link.rule.ids></links><search><creatorcontrib>Sukulova, V.V.</creatorcontrib><creatorcontrib>Barabanov, A.A.</creatorcontrib><creatorcontrib>Matsko, M.A.</creatorcontrib><creatorcontrib>Zakharov, V.A.</creatorcontrib><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</title><title>Applied catalysis. A, General</title><description>[Display omitted]
•The number of active centers (CPi) with different stereospecificity was found.•Propagation rate constants for such centers (kPi) were calculated.•Effect of hydrogen on the CPi and kPi values was studied.•Portion of “dormant” centers was estimated.
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).</description><subject>ation</subject><subject>Catalysts</subject><subject>Effect of hydrogen in propylene polymerization</subject><subject>Fractionation</subject><subject>Magnesium</subject><subject>Number of active centers</subject><subject>Polymerization</subject><subject>Propagation</subject><subject>Propagation rate constant</subject><subject>Propylene</subject><subject>Rate constants</subject><subject>Stereospecific propylene polymerization</subject><subject>Titanium</subject><subject>Titanium-magnesium (Ziegler–Natta) catalysts</subject><subject>TREF–Temperature Rising Elution Fraction</subject><issn>0926-860X</issn><issn>1873-3875</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9UU1vEzEQtVArkRb-AQdLnDfY--nlUKkKpa1URFWCxM3yesfJRIm9tZ2g7W_rj8PLcuY0njfvzYznEfKBsyVnvP60W6pBq6iWOcsTxBtR1G_IgoumyArRVGdkwdq8zkTNfr0lFyHsGGN52VYL8vro3TDuwQJ9dPvxAB5fVERnqTuBp2uMyuLxkH1TGwshvegqDdqPIX6mN8aAjtQZejf23m0giSyNW6ArZyPYv6VrHfGUkJSCD_Q3xi39gknpJ8KPBIILA2g0qDGOVNmerreAnj6BmrQTiJZOe6rNvNpccfYdOTdqH-D9v3hJfn69Wa_usofvt_er64dMF0UZsy5XDBjTgjPdt0y3TdWXnYKuqlswVdN0HdRG9AYgL1oBquwqXfOqFqbnuuqKS_Jx7jt493yEEOXOHb1NI2VeNkLk6dIiscqZpb0LwYORg8eD8qPkTE4-yZ2cfZKTT3L2KcmuZhmkH5wQvAwawWro0afzyt7h_xv8AWqqo18</recordid><startdate>20201025</startdate><enddate>20201025</enddate><creator>Sukulova, V.V.</creator><creator>Barabanov, A.A.</creator><creator>Matsko, M.A.</creator><creator>Zakharov, V.A.</creator><general>Elsevier B.V</general><general>Elsevier Science SA</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0003-2808-4325</orcidid></search><sort><creationdate>20201025</creationdate><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</title><author>Sukulova, V.V. ; Barabanov, A.A. ; Matsko, M.A. ; Zakharov, V.A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c334t-b2a0e00c810cd90c975d4baeb569ef577bbe6f8dfee2398ea4b5c61568fd1c5b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>ation</topic><topic>Catalysts</topic><topic>Effect of hydrogen in propylene polymerization</topic><topic>Fractionation</topic><topic>Magnesium</topic><topic>Number of active centers</topic><topic>Polymerization</topic><topic>Propagation</topic><topic>Propagation rate constant</topic><topic>Propylene</topic><topic>Rate constants</topic><topic>Stereospecific propylene polymerization</topic><topic>Titanium</topic><topic>Titanium-magnesium (Ziegler–Natta) catalysts</topic><topic>TREF–Temperature Rising Elution Fraction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sukulova, V.V.</creatorcontrib><creatorcontrib>Barabanov, A.A.</creatorcontrib><creatorcontrib>Matsko, M.A.</creatorcontrib><creatorcontrib>Zakharov, V.A.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Applied catalysis. A, General</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sukulova, V.V.</au><au>Barabanov, A.A.</au><au>Matsko, M.A.</au><au>Zakharov, V.A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Propylene Polymerization over Titanium-Magnesium Catalyst: Effect of Hydrogen on the Content of Active Centers with Different Stereospecificity and Their Reactivity in Propagation Reaction</atitle><jtitle>Applied catalysis. A, General</jtitle><date>2020-10-25</date><risdate>2020</risdate><volume>607</volume><spage>117836</spage><pages>117836-</pages><artnum>117836</artnum><issn>0926-860X</issn><eissn>1873-3875</eissn><abstract>[Display omitted]
•The number of active centers (CPi) with different stereospecificity was found.•Propagation rate constants for such centers (kPi) were calculated.•Effect of hydrogen on the CPi and kPi values was studied.•Portion of “dormant” centers was estimated.
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).</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.apcata.2020.117836</doi><orcidid>https://orcid.org/0000-0003-2808-4325</orcidid></addata></record> |
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| subjects | ation Catalysts Effect of hydrogen in propylene polymerization Fractionation Magnesium Number of active centers Polymerization Propagation Propagation rate constant Propylene Rate constants Stereospecific propylene polymerization Titanium Titanium-magnesium (Ziegler–Natta) catalysts TREF–Temperature Rising Elution Fraction |
| 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 |
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