Related Experiment Video
Updated: Jan 26, 2026

Small and Wide Angle X-Ray Scattering Studies of Biological Macromolecules in Solution
Published on: January 8, 2013
Time-Resolving Study of Stress-Induced Transformations of Isotactic Polypropylene through Wide Angle X-ray Scattering
Finizia Auriemma1, Claudio De Rosa2, Rocco Di Girolamo3
1Dipartimento di Scienze Chimiche, Università di Napoli "Federico II", Complesso Monte Sant' Angelo, via Cintia, 80126 Napoli, Italy. finizia.auriemma@unina.it.
Abstract:
The development of a highly oriented fiber morphology by effect of tensile deformation of stereodefective isotactic polypropylene (iPP) samples, starting from the unoriented γ form, is studied by following the transformation in real time during stretching through wide angle X-ray scattering (WAXS) measurements. In the stretching process, after yielding, the initial γ form transforms into the mesomorphic form of iPP through mechanical melting and re-crystallization. The analysis of the scattering invariant measured in the WAXS region highlights that the size of the mesomorphic domains included in the well oriented fiber morphology obtained at high deformations increases through a process which involves the coalescence of the small fragments formed by effect of tensile stress during lamellar destruction with the domain of higher dimensions.
More Related Videos
Related Concept Videos
Transformation of Plane Stress
X-ray Crystallography
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
Continuous -time Fourier Transform
Discrete-time Fourier transform
One of the notable...
Bacterial Transformation
Griffith made an unexpected discovery when he killed the pathogenic strain and mixed its remains with the live, non-pathogenic strain. Not only did the mixture kill host mice, but it also contained living pathogenic bacteria that...
Genome-wide Association Studies-GWAS
GWAS does not require the identification of the target gene involved in...

