Thermotropic polyarylate

Jackson and co-workers reported in 1976 [21,22] (on work carried out in 1971) that poly-p-oxybenzoyl-modified poly(ethylene terephthalate) was found to exhibit thermotropic liquid crystalline characteristics. A variety of thermotropic liquid crystalline polyarylates have since been described, and some of these also contain flexible spacer units [23-30]. 

D. N. Schulz, J. Bock, J. Maurer, E. Berluche, J. Kaladas, I. Duvdevani 257 Thermotropic Liquid Crystalline Polyarylates... 

I would like to acknowledge the numerous contributions of M.Okamoto,T.Yamanaka and N.Goto who prepared the thermotropic liquid crystalline polyarylates. 

Thermotropic liquid crystalline polymers containing 3-diketonato groups (-R-CO-CH2-CO-R) capable of metal ion binding (Cu , Ni ) in the main chain of polyesters or in the side chain of polyarylates are described [237]. Binding of at poly(ethyleneimine) and other polymers containing 1,2-diimino parts in the polymer chain were prepared for the use in chemotherapy of cancer [238]. 

He Xiao-Hua, Wang Xia-Yu. (2002). Synthesis and Properties of Thermotropic Liquid-Crystalhne Block-Copolymers Containing Links of Polyarylate and Thermotropic Liquid-Crystalhne Copolyester (HTH-6) Afatu/ Set. J. Xiangtan Univ, 23(1), 49-52. 

Of the thermotropic polymers, aromatic polyesters (polyarylates) have become the most common, and for this reason, special attention will be focused on fibers based on LC polyesters in this section. 

The synthesis of thermotropic polyurethanes, polyethers and aromatic polyazomethines has been reported by other researchers, but at present research on MCLCPs of the type described in this section is concentrated in academia and there has as yet been no major industrial exploitation. Block copolymers of polyarylsulphones and ketones " " are currently exciting interest in a number of laboratories. These have been prepared by synthesizing polyaryl sulphones or ketones with phenolic functionality, acetylating the end groups, and treating these functionalized blocks like a diphenol in a conventional LCP polymerization process. 

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