Block copolymers with bipyridine containing segments: Synthesis and self-organization by Cu(Ⅰ) complexation

摘要

The synthesis and properties of segmented ABA triblock and (AB)_n multiblock copolymer systems with 6,6′-disubstituted 2,2′-bipyridine (bpy) building blocks B and poly(oxytetramethy-lene) soft segments A are described. The access to the disubstituted bipyridines in large scale quantities was achieved by modification of conventional synthetic routes. In the presence of copper(Ⅰ) ions these polymers formed mononuclear [Cu(Ⅰ)(bpy)_2] complexes in solution through self-assembly. The complexed copolymers were microphase separated systems in bulk with nano to mesoscopic superstructures consisting of copper-bpy complex aggregates in a polyether matrix. The thermal, mechanical and elastomer properties of the block copolymers varied with composition.