The influence of coplanarity in dyes on the dyeing properties of nylon-6 fibre has been studied with o-Tolidine -Acid and m-Tolidine R-Acid. When nylon-6 fibre was dyed with color acids of the o-Tolidine -Acid and the m-Tolidine -Acid, it was nearly same in standard affinity, standard heat of dyeing and standard entropy change. It was also found that the entropy change on dyeing in the case of the m-Tolidine R-Acid was greater than that of the o-Tolidine -Acid. The non-coplanarity of the m-Tolidine R-Acid did not lower the standard affinity of the dye to nylon-6 fibre. This behavior contrasted with that of sterically hindered direct dyes to cellulose fibres(Benzopurpurine 4B and m-Benzopurpuring 4B to cellulose fibres). But in the case of sodium salts of the o-Tolidine -Acid and the m-Tolidine R-Acid, the standard affinity of sterically hindered m-Tolidine R-Acid was lower than that of the o-Tolidine -Acid.

In this study, as the flame-retardant finishing process, a mordant-dyeing process was used. The flash point and ignition point for Cr-mordant and Ti-mordant dyed worsted yarns were measured. The results of this process and the analysis of DTA and TGA are summed up as follows: 1. The flame-retarding effect of Ti mordanting with the metal salt is better than that of Cr-mordanting with metal salt. 2. In the analysis of TGA, initial weight loss of Cr- or Ti-mordanted dyed worsted yarn is greater than that of unfinished yarn. 3. The effect of flame retarding is better when the initial pyrolysis lasts longer at low temperature.

To check the photodegradating properties of oxime polymers which are containing the weak N-O bond in the main chain, polyoxime esters and polyoxime urethanes have been synthesized from dioximes and dibasic acid derivatives or disocyanates, and their structures have been ascertained by elemental analysis and infrared spectroscopy. These polymer films were photolyzed by using a high-pressure mercury lamp(Hitachi-SHL-100UV-2) at a distance of 15 cm and the photodegradation of the N-O bond was checked by use of ultraviolet and infrared spectroscopy. The photochemical behavior of the oxime polymers was compared with that of corresponding model compounds. Among various polyoxime esters and polyoxime urethanes, oxime polymers from dimethylglyoxime and hexamethylene diisocyanate or diphenylether diisocyanate, and also oxime polymer from cyclohexanedione dioxime and diphenylether diisocyanate have good film forming properties and have been photodegraded rapidly by UV irradiation. Upon UV irradiating these polymers, there were obtained photolyzed polymers of low molecular weight, of which the molecular weights were estimated by observing the viscosity changes. On the other hands, syntheses of polyurea and polyurethanes of which partly containing N-O bond in the main chain were attempted, but owing to poor solubility of these polymers, authors couldn't check the photochemical behavior of them.