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.
Syntheses of vat dyes composed of Algol Brilliant Green BK and its substitution of ethoxy and n-propoxy groups for the methoxy group have been made. Their colors and the fastness of the dyes towards sunlight werec ompared. The vattability as well as the dyeing ability were decreased with an increase of numbers of carbon atoms in alkoxy group.Tests on dyeing of cotton and wool from the soluble sulfonic acid esters of these dyes indicated that the hypsochromic effect was slightly decreased with an increase of numbers of carbon atom of the alkoxy group but the difference was less in cotton and more in wool.There was practically no difference in fastness of the dyes against the sunlight by the difference of alkoxy group.
The reactions of some α-chloroacetophenones (RCOCH2Cl;R=phenyl, p-methoxyphenyl, p-fluorophenyl) with Grignard reagents (R'MgX) were studied. They have been shown to yield ketones of the type of RCOCH2R' or R'COCH2R when the molar ratio of the reactants is 1:1, and to yield in many cases 1, 1, 2-trisubstituted ethanols of the type of RR'C(OH)CH2R' or R'2C(OH)CH2R (or the corresponding ethylenes) when the molar ratio is 1:2. On the contrary, a-chloroacetophenone has been found to react with an excess of phenylmagnesium bromide to yield 1, 2, 2-triphenylethanol, although 1, 1, 2-triphenylethanol could be isolated under different reactionnccoonditions.Based on these experimental results and on the conception of migrraa ory aptitude of atomic groups, the mechanism of the reactions was discussed.