Cross-linked polymers—network LC elastomers

Moderate cross-linking ( 10-20%) has no effect on the nature of the mesophases compared to an analogous homopolymer, but tends to depress all phase transition temperatures by a few degrees. Of greater significance are the mechanical properties and related alignment phenomena. Above Tci acrylic network LCPs exhibit normal rubber elasticity. 

The optical and elastic properties of these novel network LCs are quite new. Orientation via mechanical deformation, and the resultant stress-optical phenomena, can be added to the range of behaviours already associated with side chain mesogenic polymers, such as electro-optic and magneto-optic phenomena. The comb LCP design is clearly capable of delivering a wide range of novel materials. 

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