Tapered Block Copolymers Containing Ethylene and a Functionalized Comonomer
We report the synthesis of tapered block copolymers of ethylene with 5-norbornen-2-yl acetate (1) by the nickel catalyst system [N-(2,6-diisopropylphenyl)-2-(2,6-diisopropylphenylimino)propanamide] Ni(η-CH2Ph)(PMe3) (2) and Ni(COD)2 (bis(1,4-cyclooctadiene)nickel). This technique utilizes a one-pot...
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| Veröffentlicht in: | Macromolecules 2006-05, Vol.39 (9), p.3270-3274 |
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| container_title | Macromolecules |
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| creator | Diamanti, Steve J Khanna, Vikram Hotta, Atsushi Coffin, Robert C Yamakawa, Diane Kramer, Edward J Fredrickson, Glenn H Bazan, Guillermo C |
| description | We report the synthesis of tapered block copolymers of ethylene with 5-norbornen-2-yl acetate (1) by the nickel catalyst system [N-(2,6-diisopropylphenyl)-2-(2,6-diisopropylphenylimino)propanamide] Ni(η-CH2Ph)(PMe3) (2) and Ni(COD)2 (bis(1,4-cyclooctadiene)nickel). This technique utilizes a one-pot semibatch copolymerization in which ethylene is continuously added while 1 is depleted by incorporation into the polymer chain. The simplicity of this technique allows the construction of a polymer library, which enabled us to study the effect of polymer composition and chain length on solid-state morphology and mechanical and thermal properties. From these studies we were able to derive a profile relating the probability of 1 insertion vs degree of polymerization (X n ). Under proper experimental conditions, these tapered polymers form ordered microphase-separated morphologies where the phase morphology is modulated by the polymer chain length. The percent crystallinity and storage modulus of the polymers were found to be chain length dependent. |
| doi_str_mv | 10.1021/ma052456c |
| format | Article |
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This technique utilizes a one-pot semibatch copolymerization in which ethylene is continuously added while 1 is depleted by incorporation into the polymer chain. The simplicity of this technique allows the construction of a polymer library, which enabled us to study the effect of polymer composition and chain length on solid-state morphology and mechanical and thermal properties. From these studies we were able to derive a profile relating the probability of 1 insertion vs degree of polymerization (X n ). Under proper experimental conditions, these tapered polymers form ordered microphase-separated morphologies where the phase morphology is modulated by the polymer chain length. The percent crystallinity and storage modulus of the polymers were found to be chain length dependent.</description><identifier>ISSN: 0024-9297</identifier><identifier>EISSN: 1520-5835</identifier><identifier>DOI: 10.1021/ma052456c</identifier><identifier>CODEN: MAMOBX</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Applied sciences ; Copolymerization ; Exact sciences and technology ; Organic polymers ; Physicochemistry of polymers ; Preparation, kinetics, thermodynamics, mechanism and catalysts</subject><ispartof>Macromolecules, 2006-05, Vol.39 (9), p.3270-3274</ispartof><rights>Copyright © 2006 American Chemical Society</rights><rights>2006 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a355t-7b325ad4d4f9ba6fa0fb51b46db01e25dcc5c38ec6b20ae7c2649efa6a6e29f03</citedby><cites>FETCH-LOGICAL-a355t-7b325ad4d4f9ba6fa0fb51b46db01e25dcc5c38ec6b20ae7c2649efa6a6e29f03</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/ma052456c$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/ma052456c$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,780,784,2765,27076,27924,27925,56738,56788</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=17728919$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Diamanti, Steve J</creatorcontrib><creatorcontrib>Khanna, Vikram</creatorcontrib><creatorcontrib>Hotta, Atsushi</creatorcontrib><creatorcontrib>Coffin, Robert C</creatorcontrib><creatorcontrib>Yamakawa, Diane</creatorcontrib><creatorcontrib>Kramer, Edward J</creatorcontrib><creatorcontrib>Fredrickson, Glenn H</creatorcontrib><creatorcontrib>Bazan, Guillermo C</creatorcontrib><title>Tapered Block Copolymers Containing Ethylene and a Functionalized Comonomer</title><title>Macromolecules</title><addtitle>Macromolecules</addtitle><description>We report the synthesis of tapered block copolymers of ethylene with 5-norbornen-2-yl acetate (1) by the nickel catalyst system [N-(2,6-diisopropylphenyl)-2-(2,6-diisopropylphenylimino)propanamide] Ni(η-CH2Ph)(PMe3) (2) and Ni(COD)2 (bis(1,4-cyclooctadiene)nickel). This technique utilizes a one-pot semibatch copolymerization in which ethylene is continuously added while 1 is depleted by incorporation into the polymer chain. The simplicity of this technique allows the construction of a polymer library, which enabled us to study the effect of polymer composition and chain length on solid-state morphology and mechanical and thermal properties. From these studies we were able to derive a profile relating the probability of 1 insertion vs degree of polymerization (X n ). Under proper experimental conditions, these tapered polymers form ordered microphase-separated morphologies where the phase morphology is modulated by the polymer chain length. 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This technique utilizes a one-pot semibatch copolymerization in which ethylene is continuously added while 1 is depleted by incorporation into the polymer chain. The simplicity of this technique allows the construction of a polymer library, which enabled us to study the effect of polymer composition and chain length on solid-state morphology and mechanical and thermal properties. From these studies we were able to derive a profile relating the probability of 1 insertion vs degree of polymerization (X n ). Under proper experimental conditions, these tapered polymers form ordered microphase-separated morphologies where the phase morphology is modulated by the polymer chain length. The percent crystallinity and storage modulus of the polymers were found to be chain length dependent.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><doi>10.1021/ma052456c</doi><tpages>5</tpages></addata></record> |
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| source | American Chemical Society Journals |
| subjects | Applied sciences Copolymerization Exact sciences and technology Organic polymers Physicochemistry of polymers Preparation, kinetics, thermodynamics, mechanism and catalysts |
| title | Tapered Block Copolymers Containing Ethylene and a Functionalized Comonomer |
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