Abstract

It is generally believed that the mechanism of viscous flow of polymers on movement of chains relative to each other due to the movement of segments. However, nana-organization polymer is formed during synthesis of polymers, and it has a thermodynamic nature. The structure of the nana-organization includes the different content and size of the ordered formations, their possible location in the polymer volume, the packing density of the passing chains in the disordered part, which determines the degree of its ordering [1-3]. The temperature dependence of the viscosity of the homologues of atactic polystyrene in the coordinate equation of Arrhenius detect an abrupt change in the region of 125-130, and 145-150 °C (Mη=4.104) (PS-1), 165-170 and 200-205 °С (Mη =2.2.105) (PS-2) and 185-190 °С (Mη=8×105) (PS-3). These changes are explained by the manifestation of ρ0- and ρ1-phase transitions in PS-1, ρ1- and ρ2- in PS-2 and ρ2-transition in PS-3. The activation energy of the viscous flow of PS-1 decreased from 64 to 50 and to 46kJ/mol, respectively, and from 65 to 40kJ/mol with the manifestation of the ρ1-transition in PS-2, and from 140 to 40kJ/mol in the case of PS-3. About the existence of change in the structure of the nana-organization of these homologues is evidenced by the wide angle X-ray diffraction data obtained by heating them.