The effects of the presence of hexene and octene on the crystallization behavior of syndiotactic polypropylene (sPP), and in particular on the stress-induced transformations occurring during stretching have been analyzed. For hexene or octene concentrations higher than 4-5 mol% the helical form I transforms by stretching at high deformation into a different mesomorphic form, characterized by chains in the ordered 2/1 helical conformation, and disorder in the lateral packing of the chains.
The Helical Mesophase of Syndiotactic Polypropylene in Copolymers with 1-Hexene and 1-Octene / DE ROSA, Claudio; Auriemma, Finizia; DI GIROLAMO, Rocco; G., Giusto; RUIZ DE BALLESTEROS, Odda. - STAMPA. - (2011), pp. 211-214. (Intervento presentato al convegno XX Convegno Italiano di Scienza e Tecnologia delle Macromolecole tenutosi a Terni nel 4-8 settembre 2011).
The Helical Mesophase of Syndiotactic Polypropylene in Copolymers with 1-Hexene and 1-Octene
DE ROSA, CLAUDIO;AURIEMMA, FINIZIA;DI GIROLAMO, ROCCO;RUIZ DE BALLESTEROS, ODDA
2011
Abstract
The effects of the presence of hexene and octene on the crystallization behavior of syndiotactic polypropylene (sPP), and in particular on the stress-induced transformations occurring during stretching have been analyzed. For hexene or octene concentrations higher than 4-5 mol% the helical form I transforms by stretching at high deformation into a different mesomorphic form, characterized by chains in the ordered 2/1 helical conformation, and disorder in the lateral packing of the chains.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
