The crystal structure of form III of syndiotactic poly(p-methylstyrene) is presented. Chains in nearly trans-planar conformation are packed in an orthorhombic unit cell with axes a = 13.36 Angstrom, b = 23.21 Angstrom, and c = 5.12 Angstrom. The crystalline density is 0.988 g/cm(3) with four chains in the unit cell (8 monomeric units); space group Pnam. Structure factors and packing energy calculations are shown. A refinement of the structure with the Rietveld method is also presented.
Crystal-structure of Form III of Syndiotactic Poly(p-methylstyrene) / DE ROSA, Claudio; V., Petraccone; F., DAL POGGETTO; G., Guerra; B., Pirozzi; M. L., DI LORENZO; P., Corradini. - In: MACROMOLECULES. - ISSN 0024-9297. - STAMPA. - 28:(1995), pp. 5507-5511. [10.1021/ma00120a014]
Crystal-structure of Form III of Syndiotactic Poly(p-methylstyrene)
DE ROSA, CLAUDIO;
1995
Abstract
The crystal structure of form III of syndiotactic poly(p-methylstyrene) is presented. Chains in nearly trans-planar conformation are packed in an orthorhombic unit cell with axes a = 13.36 Angstrom, b = 23.21 Angstrom, and c = 5.12 Angstrom. The crystalline density is 0.988 g/cm(3) with four chains in the unit cell (8 monomeric units); space group Pnam. Structure factors and packing energy calculations are shown. A refinement of the structure with the Rietveld method is also presented.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
