Unsaturated oils metathesis polymerization

As already noted by Verkuijlen and Boelhouwer in 1974 [29], the SM of highly unsaturated fatty esters produces, among other compounds, considerable amounts of 1,4-cyclohexadiene (1,4-CHD). This fact has been exploited by Mathers et al. for the production of 1,3-cyclohexadiene (1,3-CHD) via metathesis and isomerization reactions of plant oils [141]. For instance, 1,4-CHD was obtained by treatment of soybean oil with C4 and was subsequently isomerized with RuHCl(CO)(PPh3)3. Then, the produced 1,3-CHD was polymerized with nickel(II)acetylacetonate/ methaluminoxane. Interestingly, the polymerizations could be carried out in bulk and using hydrogenated D-limonene as renewable solvent. The polymers thus obtained presented / m around 300°C. 

Rc207 supported on silica-alumina and promoted with alkyltin is active in the metathesis of single- and multiple-component fatty acid ester systems [48], The metathetical transformation of unsaturated esters derived from sunflower oil (viz. alkyl oleates and linoleates) to intermediates for the synthesis of products with medical, cosmetic, polymeric, and other applications, is of particular interest. Single- and multiple-component fatty acid esters derived from sunflower oil easily... 

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