composition

Abstract

A composition comprising a curable material comprising one or more optionally substituted epoxide units and a polymer comprising a repeat unit of formula (I): (I) X1 and X2 are each independently selected from formulae (II) and (III) with the proviso that at least one of X1 and X2 is a group of formula (II): -(Ar1)m- Formula (II) -(Ar2)p-L-(Ar3)q- Formula (III) wherein Ar1, Ar2 and Ar3 independently in each occurrence is an arylene or heteroarylene group; m is at least 1; p is at least 1; q is at least one; and L is an aliphatic linking group; the group of Formula (II) is substituted with at least one substituent R2 selected from C1- 40 alkyl in which at least two non-adjacent, non-terminal C-atoms of the C1-40 alkyl are replaced with O; one of Y1 and Y2 is CR1 wherein R1 is H or a substituent; and the other of Y1 and Y2 is N; and one of Y3 and Y4 is CR1; and the other of Y3 and Y4 is N.

Images