STRUCTURAL AND MECHANICAL ASPECTS OF INTE RACTION OF POLYAMIDE-6 WITHOXYAROMATIC COMPOUNDS

Introduction of oxyaromatic compound to PA-6 was found to be associate d with its distribution in the amorphous regions of semicrystalline po lymer between two structural forms, which are characterized by differe nt energy of interaction with polymer matrix. In a wide range of relat ive humidities, elastic properties of PA-6 containing oxyaromatic comp ound were shown to be controlled not by the net content of low-molecul ar-mass component, but by its distribution between two structural form s. In general case, the above distribution appears to govern the elast ic properties of the polymer in the region of its relaxation transitio n from glassy to rubbery state, whatever this state was achieved by in creasing the concentration of plasticizer (water) or by increasing the temperature. The experimental evidence obtained was discussed with th e account for structural heterogeneity of the amorphous regions of sem icrystalline PA-6.