Living cationic polymerization of vinylnaphthalene derivatives. Issue 22 (2nd September 2013)

• Record Type: Journal Article
• Authors: Shinke, Yu; Kanazawa, Arihiro; Kanaoka, Shokyoku; Aoshima, Sadahito
• Is Part Of: Journal of polymer science. Volume 51:Issue 22(2013:Nov.)
• Page Start: 4828
• Page End: 4834
• Publication Date: 2013-09-02
• Subjects: 547
• DOI: 10.1002/pola.26907
• Languages: English
• ISSNs: 0887-624X

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>The living cationic polymerization of 6‐<italic>tert</italic>‐butoxy‐2‐vinylnaphthalene (tBOVN), a vinylnaphthalene derivative with an electron‐donating group, was achieved with a TiCl₄/SnCl₄ combined initiating system in the presence of ethyl acetate as an added base at –30 °C. The absence of side reactions at low temperature was confirmed by ¹H NMR analysis of the resulting polymer. In contrast to this controlled reaction at –30 °C, reactions performed at higher temperature, such as 0 °C, frequently involved unwanted intramolecular or intermolecular Friedel–Crafts reactions of naphthalene rings due to the high electron density of these rings. The cationic polymerization of 6‐acetoxy‐2‐vinylnaphthalene, a derivative with an acetoxy group, was also controlled under similar conditions, but chain transfer reactions were not completely suppressed during the polymerization of 2‐vinylnaphthalene. The glass transition temperature (<italic>T</italic>_g) of the obtained poly(tBOVN) was 157 °C, a value higher by 94 °C than that of the corresponding styrene derivative. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. <bold>2013</bold>, <italic>51</italic>, 4828–4834</p> </abstract>