Thermotropic liquid crystalline polyamide

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof

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525432, 528310, 528324, 5283291, 528342, 528347, C08G 6912

Patent

active

052868389

ABSTRACT:
Thermotropic liquid crystalline copolyamides comprise: (a) a thermoplastic, aliphatic polyamide, such as nylon-6,6; and (b) a mesogen comprising an amide-linked aromatic group segment which is not completely para-linked (namely, is substantially ortho- or meta-linked or a mixture of ortho- and meta-linked) by an amide linkage to an alkylene amide group contained in the mesogen.

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J. M. G. Cowie eta l., "Thermotropic Liquid Crystalline Main-Chain Polyamides Containing Diaza-18-Crown-6-Ether Units", British Polymer Journal, vol. 20, No. 6, pp. 515-519 (1988).
M. Schnucki et al., "Strictly Alternating Polyamides with Stiff and Flexible Chain Segments: Effects on Thermotropic Liquid Crystallinity of the Introduction of an Ethylene Unit Into the Mesogenic Group", Makromol. Chem. 190, 1303-1308 (1989).
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