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Launois, Pascale
French National Centre for Scientific Research
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2022Strain-induced changes of the X-ray diffraction patterns of cross-linked poly(dimethylsiloxane): the texture hypothesis ; Changement sous contrainte des images de diffraction des rayons X du poly-dimethylsiloxane) : l'hypothèse texturalecitations
- 2022Strain-induced changes of the X-ray diffraction patterns of cross-linked poly(dimethylsiloxane): the texture hypothesiscitations
- 2020Influence of the Al/Ge Ratio on the Structure and Self-Organization of Anisometric Imogolite Nanotubescitations
- 2019Nanomaterials From Imogolite: Structure, Properties, and Functional Materialscitations
- 2016A liquid-crystalline hexagonal columnar phase in highly-dilute suspensions of imogolite nanotubescitations
- 2014Vertically aligned carbon nanotube-based composite: Elaboration and monitoring of the nanotubes alignmentcitations
- 2013Intracellular fate of carbon nanotubes inside murine macrophages: pH-dependent detachment of iron catalyst nanoparticles.citations
- 2009Insights into the mechanism of the gas-phase purification of HiPco SWNTs through a comprehensive multi-technique studycitations
- 2008Vanadium Oxide-PANI Nanocomposite-Based Macroscopic Fibers: 1D Alcohol Sensors Bearing Enhanced Toughnesscitations
- 2005NEXAFS and X-ray scattering study of structure changes after post-annealing treatments of aligned MWNTscitations
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article
Strain-induced changes of the X-ray diffraction patterns of cross-linked poly(dimethylsiloxane): the texture hypothesis
Abstract
Poly(dimethylsiloxane) is a widely used silicone polymer that undergoes partial crystallization both as free oil and rubber when sufficiently cooled. However, a description of its crystalline structure surprisingly remains a totally open question. In particular X-ray diffraction fiber patterns of stretched silicone rubbers display impressive changes with strain and a recently proposed explanation involves a rich polymorphism. The present study develops the different idea that the X-ray pattern evolution merely reflects changes in the crystalline texture: a single crystalline phase is present with a structure virtually unaffected by strain while the axis of preferential orientation for the crystallites progressively changes. This enables a quantitative description of the X-ray fiber patterns, but the remaining fundamental structural issues are underlined.