A small- and wide- angle X-ray scattering study on the smectic-α-monoclinic phase transition and on the melting behaviour of isotactic poly(propylene) cast films
✍ Scribed by Antonio Marigo; Carla Marega; Roberto Zannetti; Annamaria Fichera; Paolo Ferrari
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 372 KB
- Volume
- 196
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
The morphological changes of isotactic poly(propylene) cast films have been investigated during the smectic–α‐monoclinic phase transition and the following melting. The small‐and wide‐angle X‐ray scattering techniques allow to point out the different behaviour of a homopolymer sample and of two propylene‐ethylene copolymer samples as a function of the presence and concentration of the ethylene comonomer. During the smectic–α‐monoclinic phase transition the crystallinity increase appears to be directly connected to the lamellar thickening and/or to the formation of new lamellar stacks.