Polyhydrazides extended chain

The results reported here show that polyhydrazides do yield liquid crystalline solutions in a variety of solvents and, therefore, can exist as extended chain structures in solution. [Pg.19]

Other Extended Chain Polyhydrazides. The polyhydrazide system based on terephthaloyl, chloro-terephthaloyl, 2,5-pyridinedioyl and oxalyl units was examined by the preparation of polymers and determination of their ability to form liquid crystalline solutions in aqueous tetramethylammonium hydroxide. The acyl groups are coded T, ClT,... [Pg.29]

Another extended-chain polyhydrazide which contains no rings was prepared from oxalic di-hydrazide and trans,trans-muconvl dichloride (last formula of Table IV). The polymer had an Tinh value of 0.33 and dissolved in tetramethylammonium hydroxide to form only isotropic solutions. With a higher molecular weight sample, optically anisotropic solutions should be attained. Other possible components for this purpose are fumaroyl and acetylenedioyl (Table IV). ... [Pg.35]

TABLE IV. Some Non-Ring-Containing Polyhydrazides with Extended Chain Potential... [Pg.36]

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