Disubstituted 3,5‐isoxazolines. An easy route to polymer liquid crystal materials

Abstract

The synthesis and phase behaviour are described of new side‐chain liquid crystal polyacrylates (9a–9d) with a 3,5‐isoxazoline ring in their mesogenic core. The new homopolymers were synthesised by free radical polymerisation. Phase transition temperatures exhibited dependence on degree of polymerisation and on terminal groups. The resulting materials exhibited typical smectic A mesomorphism.

Keywords:

• side‐chain liquid crystal polymers
• [3+2] cycloaddition
• disubstituted 3,5‐isoxazolines

Acknowledgements

The authors acknowledge CNPq through Edital Universal 2004. PHS thanks the Edital MCT/CNPq n° 042/2006 project n° 555 785/2006‐8 for financial support. G.D.V. is an undergraduate student and thanks FAPERGS for his fellowship.