Polyether nitrile and polyether nitrile-containing carbon fiber composite material

Abstract

Provided is a polyether nitrile which has N repeating units represented by formula (I) and M repeating units represented by formula (II), wherein: N and M are integers satisfying the relational expression 0<(N / (N+M))≤1.00; and the weight loss rate is 5% or less as determined by being held in the air at a temperature that is higher than the melting point thereof by 30°C for 30 minutes in thermogravimetric analysis (TG). Also provided is a polyether nitrile-containing carbon fiber composite material which contains the polyether nitrile and carbon fibers.