Non-Standard Transverse Deformation of a Crystalline Lattice Induced by the Application of Tensile Stress
✍ Scribed by Finizia Auriemma; Claudio De Rosa; Ludovica Caliano; Marco Corradi
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 315 KB
- Volume
- 293
- Category
- Article
- ISSN
- 1438-7492
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
A reversible stress‐induced phase transition occurs by stretching syndiotactic copolymers of propene and 1‐butene with 1‐butene content higher than 70 mol‐%. It involves a non‐standard mode of distortion of the crystalline lattice in a direction transverse, rather than parallel, to the applied tensile stress. We demonstrate that this distortion reflects conformational and crystallographic restraints on the slip processes involved at high deformations. This transition plays an important role in the elasticity of this novel class of thermoplastic elastomers, which show rigidity and mechanical strength two orders of magnitude higher than those of conventional elastomers.
magnified image