Synthesis and rheological study of some maleic acid and fumaric acid stereoregular polyesters, 3. Synthesis of a series of configurationally pure aliphatic polymaleates

A series of aliphatic polymaleates was prepared by polycondensation of potassium maleate with α,ω‐dibromoalkanes Br(CH2)n Br (n = 1, 2, 3, 4, 5, 6, 8 and 10) in 1‐methyl‐2‐pyrrolidone. In practically all cases the formation of high‐molecular‐weight polyesters is accompanied by the production of substantial amounts of cyclic oligomers. This polycondensation reaction, carried out at moderate temperature, allows to obtain configurationally pure polymaleates. The resulting unsaturated polyesters are highly viscous liquids with glass transition temperatures below room temperature.