Vv. Tereshatov et Vy. Senichev, THE EFFECT OF LOW-MOLECULAR-MASS LIQUIDS ON PHYSICAL NETWORK AND VISCOELASTIC PROPERTIES OF CROSS-LINKED AMORPHOUS POLYDIENEURETHANES, Vysokomolekularnye soedinenia. Seria A, 37(11), 1995, pp. 1888-1895
Deformational behavior of cross-linked amorphous polydieneurethanes in
the presence of nonpolar and proton-accepting low-molecular-mass liqu
ids was studied. As evidenced by IR spectroscopy, the breakdown of the
network of interchain physical bonds in polyurethanes was realized no
t only in the presence of proton-accepting but also in the presence of
nonpolar compounds, which functioned as diluents. Within the framewor
k of the theory of elasticity, the effect of plasticizing agents on po
lymer deformation and a concomitant transformation of the properties o
f three-dimensional network from the properties associated with an aff
ine network to the properties corresponding to a phantom network were
considered. For the elastomers studied, a model providing an adequate
description for the dependences between tensile stress and strain in a
wide range of variations of strain rates and concentrations of plasti
cizing agents in elastomers was advanced.