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RESEARCH PRODUCT

Some new examples of polymer modification

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This lecture summarizes some of our recent results about reactions with synthetic polymers. By cationic ring-opening polymerization of 4H, 7H-1,3-dioxepin a linear polyacetal containing one C-C-double bond per repeating unit is obtained. Copolymerization of this monomer with trioxane or dioxolane is possible. Various addition reactions can be carried out with these unsaturated polyacetals, polymeric epoxides being of special interest. Some other unsaturated cycloacetals are briefly mentioned. Amide moieties in linear polyamides can be modified by different reactions. Preparation and properties of poly-N-chloroamides and poly-N-trifluoroacetyl-amides are described. By reaction of metalated polyamides with alkyl halides poly-N-alkylamides are available. Anionic grafting reactions can also be carried out. Reduction of the amide groups leads to the formation of polyminoalkylenes. By topochemical polymerization of esters of 10,12-docosadiyne-1, 22-diol soluble polydiacetylenes are obtained. These polymers react in homogeneous solution with SbCl5 or FeCl3. Furthermore the hydrolysis of the ester groups and the reacylation is described.