Cycloolefin Copolymers by Early and Late Transition Metal Catalysts. Issue 2 (13th December 2012)

• Record Type: Journal Article
• Authors: Tritto, Incoronata; Boggioni, Laura; Ravasio, Andrea; Scalcione, Giulia
• Is Part Of: Macromolecular reaction engineering. Volume 7:Issue 2(2013:Feb.)
• Page Start: 91
• Page End: 97
• Publication Date: 2012-12-13
• Subjects: Polymers -- Periodicals; Polymerization -- Periodicals; Reaction mechanisms (Chemistry) -- Periodicals; Electronic journals; 547.705
• DOI: 10.1002/mren.201200056
• Languages: English
• ISSNs: 1862-832X

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The complex [Pd(κ²‐<italic>P, O</italic>‐{2‐(2‐MeOC₆H₄)₂P}C₆H₄SO₃)Me(dmso)] (<bold>1</bold>) is investigated for the copolymerization of (E) with norbornene (N) and functionalized N derivatives affording P(E‐<italic>co</italic>‐N) in excellent yields. Copolymer molar masses are higher than those of PE and increase with N concentration. In addition, the complex [Ti(κ²‐<italic>N, O</italic>‐{2, 6‐F₂C₆H₃N = C(Me)C(H) = C(CF₃)O})₂Cl₂] (<bold>2</bold>) is evaluated as catalyst for living E‐<italic>co</italic>‐N copolymerization upon activation with dried methylaluminoxane between 25 and 90 °C. Copolymerization at different [N]/[E] feed ratios affords stereoirregular alternating high molar mass P(E‐<italic>co</italic>‐N) with narrow molar mass distribution. P(E‐<italic>co</italic>‐N) living copolymerization is demonstrated by kinetics at 50 °C. Block copolymers are synthesized and fully characterized. <boxed-text content-type="graphic" position="anchor" orientation="portrait"><graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pgg1s09c39x" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></boxed-text></p> </abstract>