A SMALL-ANGLE AND WIDE-ANGLE X-RAY-SCATTERING STUDY ON THE SMECTIC-ALPHA-MONOCLINIC PHASE-TRANSITION AND ON THE MELTING BEHAVIOR OF ISOTACTIC POLY(PROPYLENE) CAST FILMS

Authors
MARIGO A MAREGA C ZANNETTI R FICHERA A FERRARI P
Citation
A. Marigo et al., A SMALL-ANGLE AND WIDE-ANGLE X-RAY-SCATTERING STUDY ON THE SMECTIC-ALPHA-MONOCLINIC PHASE-TRANSITION AND ON THE MELTING BEHAVIOR OF ISOTACTIC POLY(PROPYLENE) CAST FILMS, Macromolecular chemistry and physics, 196(11), 1995, pp. 3577-3584
Citations number
9
Categorie Soggetti
Polymer Sciences
Journal title
Macromolecular chemistry and physics → ACNP
ISSN journal
10221352
Volume
196
Issue
11
Year of publication
1995
Pages
3577 - 3584
Database
ISI
SICI code
1022-1352(1995)196:11<3577:ASAWXS>2.0.ZU;2-#
Abstract
The morphological changes of isotactic poly(propylene) cast films have been investigated during the smectic-alpha-monoclinic phase transitio n and the following melting. The small-and wide-angle X-ray scattering techniques allow to point out the different behaviour of a homopolyme r sample and of two propylene-ethylene copolymer samples as a function of the presence and concentration of the ethylene comonomer. During t he smectic-alpha-monoclinic phase transition the crystallinity increas e appears to be directly connected to the lamellar thickening and/or t o the formation of new lamellar stacks.