In the research co-operation between the Theoretical Laboratory of the Institute of Macromolecular Compounds and laboratories in Russia and scientists from INTAS member states, a better understanding of the local and co-operative motions in polymer networks will be achieved. These motions are manifested in dielectric and mechanical relaxations, T2-NMR relaxation, light scattering and other experimental methods. Starting from the experience in theoretical description of molecular motions in the melt at the Institute of Macromolecular Compounds and the experimental possibilities of the partners, the investigations will be extended to polymer networks. Different structure parameters will be varied in a systematic manner. The project will include the exchange of scientists of Russia and western Europe, and the preparation and exchange of model samples between the experimental groups.