Synthesis and Properties of Polyacetylene-Polynorbornene-Polyacetylene TriblockCopolymers

摘要

Polyacetylene-block-polynorbornene-block-polyacetylene triblock copolymers weremade via the Durham precursor route using a dititanacyclobutane living metathesis catalyst. I.R. and u.v-v.i.s. spectroscopic investigations on stretch-oriented copolymer films show high anisotropies with polarized light. The copolymers stay soluble if the thermal conversion is carried out in solution. Electron micrographs using different imaging systems (TEM, STEM, SEM) and thermal analysis data show phase separation between domains of the different polymers blocks. Living polymerization, Polyacetylene triblock copolymers, Phase separation.