Acetylene-norbornene copolymers

Ramakrishnan, S. ; Hirsch, J. A. ; Martinez, J. R. ; Chien, J. C. W. (1989) Acetylene-norbornene copolymers Journal of Polymer Science Part A: Polymer Chemistry, 27 (12). pp. 3937-3949. ISSN 0887-624X

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Metathesis ring opening polymerization has been used to copolymerize norbornene and 7,8-bis(trifluoromethyl)tricyclo[4,2,2,02,5]deca-3,7,9-triene. Subsequent thermal elimination of the precursor copolymers yielded acetylene-norbornene copolymers. The undoped copolymers were found to have electrical conductivity, spin concentration, and EPR linewidths which vary with composition. The location of the trans-C-H out-of-plane vibration, however, was invariant at 1010cm-1 indicating that conjugation length of n > 4 are present even at 40% acetylene content in the copolymer. The copolymers containing 79 mol % of acetylene units attained a doped conductivity of 0.02 S/cm with a dopant concentration of 6 mol % of I̅3 per sp2 carbon.

Item Type:Article
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