芳香族ポリエステル-ヒドラジドの繊維およびフィルムの性質

概要

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Aromatic polyester-hydrazide, having good light-fastness, flame-resistance and nonmelting, were synthesized from isophthaloyl-dihydrazide, terephthaloyl dichloride and 2, 2-bis (3, 5-dibromo-4-hydroxyphenyl) propane (TBA). Molding properties of these copolymers and the various physical and chemical characteristics of fibers and films were estimated. The results are summarized as follows: 1) Molding properties. Polyester-hydrazides were easily dissolved in dimethylsulfoxide and could be spun in water (dry tenacity 2.3g/d; dry elongation, 14%; initial strength, 56g/d). On the other hand, colourless and tough films were obtained by dry casting method. 2) Flammability. The LOI value of this copolymer containing about 9 wt. % bromine was 31.5 and was selfextinguishable. 3) Light-fastness. After the irradiation with a Fade-O-meter for 40 hours, they did not show any yellowish colour and fiber properties stayed unchanged. 4) Use as thermostable film. This copolymer exhibited an excellent electric insulation (139kV/mm) and could be used continuously at 155°C. 5) Use for a reverse osmosis membrane. The salt rejection was about 95% when the flux rate was 700 l/m2/D and polyester-hydrazide exhibited excellent properties as a reverse osmosis membrane.
公益社団法人高分子学会の論文