Process for preparing polyacetylenes and substituted polyacetylenes produced thereby
AssigneeBrown, Boveri & Cie AG
InventorGert Weddigen
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Abstract
Substituted polyacetylenes are prepared by contacting a mixture of acetylene and a substituted acetylene with a polymerization catalyst. The substituents on the polyacetylene chains increase the distance between neighboring parallel chains and shield the chains from attack by oxygen, thereby preventing crosslinking of the chains.
Claims1
A process for preparing a substituted polyacetylene by catalytic polymerization which comprises copolymerizing acetylene gas and phenylacetylene in the presence of tungsten pentachloride at a temperature of about 20.degree. C. or greater wherein about 0.5 to 25% of the hydrogen atoms in the copolymer chains are replaced by phenyl groups, thereby producing an interchain distance between adjacent copolymer chains sufficient to hinder oxidative crosslinking therebetween.
Dependencies are inferred from the claim text.