Financial support from Basell Polyolefins (Italy) is gratefully acknowledged.
The Deformability of Polymers: The Role of Disordered Mesomorphic Crystals and Stress-Induced Phase Transformations†
Article first published online: 21 DEC 2011
Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Angewandte Chemie International Edition
Volume 51, Issue 5, pages 1207–1211, January 27, 2012
How to Cite
De Rosa, C. and Auriemma, F. (2012), The Deformability of Polymers: The Role of Disordered Mesomorphic Crystals and Stress-Induced Phase Transformations. Angew. Chem. Int. Ed., 51: 1207–1211. doi: 10.1002/anie.201105289
- Issue published online: 24 JAN 2012
- Article first published online: 21 DEC 2011
- Manuscript Revised: 28 NOV 2011
- Manuscript Received: 27 JUL 2011
- Basell Polyolefins (Italy)
- homogeneous catalysis;
- mechanical properties;
Crystals in polymers: The γ form of isotactic polypropylene shows an unexpected better ductility than the mesophase because of the occurrence of a stress-induced transition from the γ form to the mesophase. This provides a mechanism of conversion of mechanical energy into latent heat of fusion that induces local melting of the crystals followed by recrystallization at high deformation in the mesophase (see picture).