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16 results on '"Mitchell, Geoffrey Robert"'

9. Green Copolymers and Nanocomposites from Myrcene and Limonene Using Algerian Nano-Clay as Nano-Reinforcing Filler

Author

Derdar, Hodhaifa, primary, Mitchell, Geoffrey Robert, additional, Mateus, Artur, additional, Chaibedraa, Sarra, additional, Elabed, Zinelabidine Otmane, additional, Mahendra, Vidhura Subash, additional, Cherifi, Zakaria, additional, Bachari, Khaldoun, additional, Chebout, Redouane, additional, Meghabar, Rachid, additional, Harrane, Amine, additional, and Belbachir, Mohammed, additional

Published
2022
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13. Editorial: Innovators in mechanics of materials.

Author

Seunghwa Ryu, Mitchell, Geoffrey Robert, Caggiano, Antonio, Radovitzky, Raul A., Trovalusci, Patrizia, and Pugno, Nicola Maria

Subjects
SOLID mechanics, ROCK deformation, STRAINS & stresses (Mechanics), SHEAR (Mechanics), FRACTURE mechanics, SOLID state batteries, SUPERIONIC conductors
Abstract

This document is an editorial from the journal Frontiers in Materials titled "Innovators in mechanics of materials." It highlights the contributions of researchers in the field of mechanics of materials and aims to provide a snapshot of the current state of the field and potential future developments. The editorial showcases six key contributions, including topics such as metal foams, acoustic insulation panels, functionally graded beams, solid-state batteries, rock deformation, and non-Newtonian nanofluid flow. The Research Topic aims to stimulate collaboration and knowledge exchange among researchers in the field. [Extracted from the article]

Published
2024
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14. Time-Resolving Study of Stress-Induced Transformations of Isotactic Polypropylene through Wide Angle X-ray Scattering Measurements.

Author

Auriemma, Finizia, De Rosa, Claudio, Di Girolamo, Rocco, Malafronte, Anna, Scoti, Miriam, Mitchell, Geoffrey Robert, and Esposito, Simona

Subjects
POLYPROPYLENE testing, MECHANICAL chemistry, X-ray scattering, PHASE transitions, STRUCTURAL analysis (Science)
Abstract

The development of a highly oriented fiber morphology by effect of tensile deformation of stereodefective isotactic polypropylene (iPP) samples, starting from the unoriented 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 form transforms into the mesomorphic form of iPP through mechanical melting and re-crystallization. The analysis of the scattering invariant measured in theWAXS 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. [ABSTRACT FROM AUTHOR]

Published
2018
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16. Time-resolving study of stress-induced transformations of isotactic polypropylene through wide angle X-ray scattering measurements

Author

Geoffrey R. Mitchell, Simona Esposito, Rocco Di Girolamo, Finizia Auriemma, Claudio De Rosa, Anna Malafronte, Miriam Scoti, Auriemma, Finizia, De Rosa, Claudio, Di Girolamo, Rocco, Malafronte, Anna, Scoti, Miriam, Mitchell, Geoffrey Robert, and Esposito, Simona

Subjects
Materials science, Stress-induced phase transition, Polymers and Plastics, Isotactic polypropylene, Structural analysis, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Article, lcsh:QD241-441, lcsh:Organic chemistry, Tacticity, isotactic polypropylene, stress-induced phase transitions, structural analysis, X-ray diffraction, Ultimate tensile strength, Lamellar structure, Composite material, Wide-angle X-ray scattering, Coalescence (physics), Scattering, Stress induced, Structural analysi, Chemistry (all), Stress-induced phase transitions, General Chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, X-ray crystallography, 0210 nano-technology
Abstract

The development of a highly oriented fiber morphology by effect of tensile deformation of stereodefective isotactic polypropylene (iPP) samples, starting from the unoriented 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 form transforms into the mesomorphic form of iPP through mechanical melting and re-crystallization. The analysis of the scattering invariant measured in theWAXS 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. info:eu-repo/semantics/publishedVersion

Published
2018

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