主鎖中にピリジン核を有するポリアミド系新合成繊維に関する研究 (第7報) : 重合体ならびに繊維に関する諸性質

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The properties of polymer and fiber of polyamide synthetic fiber having pyridine ring in the main chain have been investigated in order to find its value for practical application.The result of investigation of its stability an fusion by heating, after experiment on the resistance to organic solvent, indicated that it was suitable for melt spinning and also a certain knowledge on its viscosity of solution was obtained.Instead of usual measurement of apparent melting point by capillary method with comparatively low accuracy, an accurate range of melting point was found by dilatometric method.Also, the presence of second transition point which has close relation with elongation and other physical properties of the fiber was clarified.Estimation of tensile-strength, elongation elasticity, and tensile strength-elognation curve indicated that the fiber has characteristic properties required for practical use.Its moisture absorption, resistances to hot water, light acid and alkali were within the limit of specification required for synthetic fibers.Its dyeing ability as a synthetic fiber was good. From the results of estimation of X-ray graph, density and double refraction, a certain knowledge of its crystallization tendency was obtained.The copolymerized polyamide fiber of this kind can be called a synthetic fiber of practical use having high Young coefficient and good dyeing ability.
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