Skip to Main content Skip to Navigation
Theses

Relaxation nucléaire dans des conditions de "spin-lock" en présence d'intéractions dipolaires : applications aux élastomères

Abstract : This work deals with the nuclear relaxation particularly when the measurements are in the presence of a spin-lock field with the view to characterize vulcanized rubbers. The first chapter is a cursory glance at the different procedures calling on the Nuclear Magnetic Resonance (NMR) which permits the access to some structural and dynamical properties of rubbers. During the second chapter, the evolution of the magnitude of a system of two protons coupled by dipolar interactions and locked by a radiofrequency field had been studied theoretically and experimentally. In the third chapter, the different potentialities provided by the measurements of the spin relaxation are evaluated with the aim of the characterization of natural vulcanized and/or filled rubbers. The relaxation time measured in the presence of a spin-lock field appears the most reliable one. Then, the microscopy by radiofrequence field gradient is applied (chapter 4) to those rubbers. The relaxation time pictures (measured in the presence of a spin-lock field) display the constrained areas prominently.
Document type :
Theses
File URL :
http://docnum.univ-lorraine.fr/prive/SCD_T_2002_0279_CHAUMETTE.pdf
Complete list of metadata

https://hal.univ-lorraine.fr/tel-01746872
Contributor : Thèses Ul Connect in order to contact the contributor
Submitted on : Thursday, March 29, 2018 - 10:46:40 AM
Last modification on : Monday, October 19, 2020 - 2:06:50 PM

Identifiers

  • HAL Id : tel-01746872, version 1

Collections

Citation

Hervé Chaumette. Relaxation nucléaire dans des conditions de "spin-lock" en présence d'intéractions dipolaires : applications aux élastomères. Autre. Université Henri Poincaré - Nancy 1, 2002. Français. ⟨NNT : 2002NAN10279⟩. ⟨tel-01746872⟩

Share

Metrics

Record views

15