Thermotropic liquid crystalline copolyesteramides

S. C. Tjong, R. K. Y. Li, and X. Xie. Properties of in situ composites based on semiflexible thermotropic liquid crystalline copolyesteramide and polyamide 66 blends. Polym. J. (Tokyo), 32 907-914,2000. 

The thermal expansivity and thermal conductivity of thermotropic liquid crystalline copolyesteramides (Vectra B950 and Vectra A950), with a draw ratio X from 1.3 to 15, have been measured parallel and... 

Three commercially available thermotropic liquid crystalline polymers (TLCPs) were presented as examples in this section. They are Hoechst Celanese Vectra A950 and Vectra B950 as well as Amoco Xydar . Vectra A950 is a random copolymer of 73 mol% 4-hydroxybenzoic acid and 27 mol% 6-hydroxy-2-naphthoic acid, and Vectra B950 is a random copolyesteramide consisting of 60 mol% of 6-hydroxy-2-naphthoic acid, 20 mol% terephthalic acid, and 20 mol% p-aminophenol. Xydar is made from p-hydroxybenzoic acid, isophthalic and/or terephthalic acids, and 4,4 -biphenol. The repeating unit structures of the three LCPs are shown in Figure 6.2. 

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