Some Features of the Chemical Plasticization of Polymers Wihtout Side Groups

The changes in the temperature of the glass transition (Тg), the energy of cohesion(Еcoh), the modulus of elasticity when shifted (G) in the polyethers, which has difference in the polarity and the van der Waals volume (Vvw) of the links, were analyzed. Also, the phenomenon of chemical plasticization in polyether through introduction into the main chain of macromolecules of additional nonpolar groups was studied. It was shown that the criterion of chemical plasticization is written by the formulae ∆Тg = сonst.∆Vvw.