The conformation and the packing of the chains of the alternating ethylene-chlorotrifluoroethylene copolymer (ECTFE), in the crystalline phase, are investigated by X-ray diffraction analysis, by calculations of the conformational energy and by calculations of the Fourier-transforms of models. These analyses suggest that the crystalline form of ECTFE is a mesomorphic form, with a pseudo-hexagonal packing of the axes of nearly trans-planar chains (interchain distances of 5,69 angstrom) and a nearly complete translational and rotational disorder along the chain axis.
On the Conformation and the Crystalline-structure of An Ethylene-chlorotrifluoroethylene Alternating Copolymer / Guerra, G.; DE ROSA, Claudio; Iuliano, M.; Petraccone, V.; Corradini, P.; Pucciariello, R.; Villani, V.; Ajroldi, G.. - In: DIE MAKROMOLEKULARE CHEMIE. - ISSN 0025-116X. - STAMPA. - 193:(1992), pp. 549-558.
On the Conformation and the Crystalline-structure of An Ethylene-chlorotrifluoroethylene Alternating Copolymer
DE ROSA, CLAUDIO;M. IULIANO;
1992
Abstract
The conformation and the packing of the chains of the alternating ethylene-chlorotrifluoroethylene copolymer (ECTFE), in the crystalline phase, are investigated by X-ray diffraction analysis, by calculations of the conformational energy and by calculations of the Fourier-transforms of models. These analyses suggest that the crystalline form of ECTFE is a mesomorphic form, with a pseudo-hexagonal packing of the axes of nearly trans-planar chains (interchain distances of 5,69 angstrom) and a nearly complete translational and rotational disorder along the chain axis.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
