Determination of the number of branches and other defects in the structure of dense polymer networks

Peculiarities of the structure and properties of highly cross-linked polymer networks

“…Let us perform such an analysis taking a network based on methyl methacrylate ± 1-methoxy-1-vinyl-1-sila-2,7-dioxa-4,5-(1,2-carborano)cycloheptane copolymer as an example. The chemical structure of this copolymer has the form 41 When the copolymer is exposed to heat, ring opening occurs in the fragment 17 to form a network of the following chemical structure:…”

“…The calculations of melting points of polymers (T m ) showed 7 that the energy of the intermolecular interaction D i for a given type of atom depends on whether it is a constituent of the atomic group that forms a hydrogen bond or is involved in the dipoledipole interaction. Therefore, the influence of specific interaction will manifest itself mainly through the energy of intermolecular interaction D i of the given type of atom when DE i is calculated using formula (41), while d a i and d cr i increments are not affected by the hydrogen bonds and dipole ± dipole interactions.…”