ABSTRACT
The van der Waals intermolecular interactions with the dispersion nature [(induced) dipole-dipole type] and with the inductive nature, and also those involving the hydrogen bonds, have the signifi cant ordering impacts on the supermolecular structures of linear polyurethanes. The urethane and ester groups, because of their stable dipole moments, are characterised by relatively high cohesion energy values (36.5 and 12.1 kJ/mol) as compared to the ether group (4.2 kJ/mol) and methylene group (2.85 kJ/mol). The cohesion energy of the aromatic ring amounts to 16.9 kJ/mol [55, 274, 275].
