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α‐Cyan‐methylacrylat (I) reagiert mit Vinyl‐isobutyl‐ether (II) reversibcl zu einem Cycloaddukt (IV), das thermisch zu (V) gespalten und mit Methanol zu (VI) hydrolysiert werden kann.

Previous work has demonstrated that compatible blends of main‐chain liquid crystal polymers (LCP) with side‐chain LCP's can be prepared. The present work was carried out to extend the scope and application of this finding to liquid crystal polyesters, similar to commercially available LCP's and to demonstrate the effect of the blend composition upon the physical and mechanical properties. A series of melt‐processable main‐chain polyesters was prepared as well as a series of acrylic polymers and copolymers which possess a side‐chain mesogenic unit, similar to that of the main‐chain LCP's. While the results of the blending studies of these high molecular weight materials were somewhat ambiguous as to compatibility, there are strong indications that the presence of the side‐chain mesogen containing polymers does result in an improvement in the overall mechanical properties of the main‐chain LCP.