Homo‐ and copolymerization of norbornene derivatives with ethene by <i>ansa</i>‐fluorenylamidodimethyltitanium activated with methylaluminoxane

DOI Web Site Web Site 被引用文献5件

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公開日
2007-08-29
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/pola.22193
公開者
Wiley

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<jats:title>Abstract</jats:title><jats:p>(<jats:italic>t</jats:italic>‐BuNSiMe<jats:sub>2</jats:sub>Flu)TiMe<jats:sub>2</jats:sub> (<jats:bold>1</jats:bold>) activated with Me<jats:sub>3</jats:sub>Al‐free methylaluminoxane (dried MAO) which conducts vinyl addition polymerization of norbornene (N) with very high activity was applied for homopolymerization of N derivatives (i.e., 5‐vinyl‐2‐norbornene (5V2N), 5‐ethylidene‐2‐norbornene (5E2N), dicyclopentadiene (DCPD)) at 40 °C. The activities for the N derivatives were about two orders of magnitude lower than that for N and decreased in the following order: 5E2N ≫ 5V2N ≫ DCPD. Copolymerization of ethene (E) and 5E2N under an atmospheric pressure of E was then conducted by <jats:bold>1</jats:bold>‐dried MAO. The copolymerization proceeded with better activity than the homopolymerization of 5E2N and gave poly(E‐<jats:italic>co</jats:italic>‐5E2N) with narrow molecular weight distribution. The content of the ethylidene group in poly(E‐<jats:italic>co</jats:italic>‐5E2N) was controlled by the feed ratio of 5E2N/E. The <jats:italic>T</jats:italic><jats:sub>g</jats:sub> value of the copolymer changed from 70 °C to 155 °C according to the 5E2N content from 27 mol % to 68 mol %. The addition of N as a third monomer to the E‐5E2N copolymerization improved the activity and raised the <jats:italic>T</jats:italic><jats:sub>g</jats:sub> values of the terpolymer above 200 °C. The content of 5E2N was controlled by the 5E2N/N ratio with keeping the high <jats:italic>T</jats:italic><jats:sub>g</jats:sub> values. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 4581–4587, 2007</jats:p>

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