THE STUDIES ON FINE STRUCTURE OF 6 NYLON FIBRES BY THE MEASUREMENT OF THE AMOUNT OF PHENOL ABSORBED

Abstract

In the previous report, the concentration of phenol in solution was used for the scale of lateral-order, and the estimation method of lateral-order distribution in the 6 nylon fibre was described.In this report, the chemical potential (μui) of a polymer repeating unit of each cohesive states is used for the scale of lateral-order. μuo is used for the chemical potential in the standard state (pure liquid polymer, amorphous state). -(μui-μuo) is put to ∇Fui, and expressed as the following; Cσ_??_: Concentration of phenol in solution. Vu: Molecular volume of polymer repeating unit. υp: Specific volume of pure liquid polymer (amorphous state). K: Phenol partition coefficient between 6 nylon fibre which has changed wholly into amorphous state and water. V1: Molecular volume of liquid phenol. υs: Specific volume of liquid phenol. X1: Interaction parameter.Lateral-order distributions in various dry-heat-treated, various aqueous-heat-treated and various ph-enol-treated 6 nylon fibres, are estimated by the previous method. Each distribution is drawn in graph and both concentration of phenol in solution and ∇Fui value are written in the abscissa.The shapes of lateral-order distribution are similar mutualy between the 170°C dry-heat-treated and the 100°C aqueous-heat-treated 6 nylon fibres, among the 200°C dry-heat-treated, 130°C aqueous-heat-treated and 30 g/l phenol-treated 6 nylon fibres, and between the 150°C aqueous-heat-treated and the 40 g/l phenol-treated 6 nylon fibres.The more severe the conditions of treatment is, the more the regions of perfect cohesive state increases, and the more the regions of imperfect cohesive state decreases. The intermediate regions increase by the treatment of the intermediate conditions.