The van der Waals potential energy of polyethylene [9002-88-4] and polytetrafluoroethylene [9002-84-0], computed as a function of both 2 and 3 angles of rotation around the bonds of the backbone chain, showed more minima than predicted by the equivalence principle. The van der Waals potential energy in PTFE crystals, rotating the polymer chains around their helical axes in phase, indicated that the macromols. were free-rotating.
Calculation of the van der Waals potential energy for polyethylene and polytetrafluoroethylene as two-atom and three-atom chains: rotational freedom in the crystals / D'Ilario, Lucio; Giglio, Edoardo. - In: ACTA CRYSTALLOGRAPHICA. SECTION B, STRUCTURAL CRYSTALLOGRAPHY AND CRYSTAL CHEMISTRY. - ISSN 0567-7408. - STAMPA. - 30:2(1974), pp. 372-378. [10.1107/s0567740874002846]
Calculation of the van der Waals potential energy for polyethylene and polytetrafluoroethylene as two-atom and three-atom chains: rotational freedom in the crystals
D'ILARIO, LUCIO;GIGLIO, Edoardo
1974
Abstract
The van der Waals potential energy of polyethylene [9002-88-4] and polytetrafluoroethylene [9002-84-0], computed as a function of both 2 and 3 angles of rotation around the bonds of the backbone chain, showed more minima than predicted by the equivalence principle. The van der Waals potential energy in PTFE crystals, rotating the polymer chains around their helical axes in phase, indicated that the macromols. were free-rotating.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
