English Abstract

Polymer Modification Exploiting Stable Nitrile N-Oxide

Yasuhito KOYAMA
Akishige SEO
Toshikazu TAKATA
Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo , Japan
Nippon Gomu Kyokaishi,(2011),84(4),111-116 Original Paper in Japanese

This paper describes the powerful practical modification method of elastomers with unsaturated bonds exploiting kinetically stabilized nitrile N-oxides. The stable nitrile N-oxides enable the efficient 1,3-dipolar cycloaddition to both internal olefin and nitrile groups incorporating into versatile elastomers such as acrylonitrile butadiene rubber (NBR), natural rubber (NR), and ethylene-propylene-diene terpolymer (EPDM) to give the corresponding hetero aromaticscontaining polymers. The reaction features i) catalyst-free procedure, ii) versatile applicability to various elastomers, iii) high yield, iv) high regio-selectivity, v) no by-product, and vi) remarkable acceleration of reaction rate under solvent-free condition. The scope and limitation of the modification reaction are discussed in detail.

Keywords: Stable Nitrile N-Oxide, Click Reaction, Elastomer, Polymer Modification, Catalyst-free Reaction