Strong liquid-crystalline polymeric compositions

Details Strong liquid-crystalline polymeric compositions Strong liquid-crystalline polymeric compositions

1992-06-05

1993-12-07

Tucker, Philip

Compositions

Liquid crystal compositions

2522996, 25229961, 25229966, 428 1, C09K 1952, C09K 1934, C09K 1912, C09K 1900

Patent

active

052685845

ABSTRACT:
Strong liquid-crystalline polymeric (LCP) compositions of matter. LCP backbones are combined with liquid crystalline (LC) side chains in a manner which maximizes molecular ordering through interdigitation of the side chains, thereby yielding materials which are predicted to have superior mechanical properties over existing LCPs. The theoretical design of LCPs having such characteristics includes consideration of the spacing distance between side chains along the backbone, the need for rigid sections in the backbone and in the side chains, the degree of polymerization, the length of the side chains, the regularity of the spacing of the side chains along the backbone, the interdigitation of side chains in sub-molecular strips, the packing of the side chains on one or two sides of the backbone to which they are attached, the symmetry of the side chains, the points of attachment of the side chains to the backbone, the flexibility and size of the chemical group connecting each side chain to the backbone, the effect of semiflexible sections in the backbone and the side chains, and the choice of types of dipolar and/or hydrogen bonding forces in the backbones and the side chains for easy alignment.

REFERENCES:
Ringsdorf et al., Makromol. Chem., Rapid Common., vol. 7, pp. 389-396, (1).
Ringsdorf et al., Makromol. Chem., Rapid Common., vol. 7, pp. 381-388, (1986).
Ringsdorf et al., Makromol. Chem., Rapid Commun., vol. 6, pp. 291-299 (1985).
Arnold et al., Polymer Preprints, vol. 27, pp. 221-222, (1986).
Burkett et al., Polymer Preprints, vol. 28, pp. 278-279 (1987).

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