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The influence of the PDMS technique in the study of the induced modifications of polymers used in nuclear environment; Apport de la technique PDMS a l`etude des modifications induites dans des polymeres utilises en ambiance nucleaire

Abstract

The PDMS technique (Particle Induced Desorption Mass Spectrometry) combined with a TOF detection (Time of Flight) is the main tool used in this study of polymer degradation in nuclear environment. Ar{sup 3+} ions with a 9 MeV energy have been used to induce the secondary ion emission, and the study was devoted to two stresses typical of this type of environment. The first part of the work concerned with the structural modifications induced by gamma irradiation on ion exchange resin, used for nuclear effluents reprocessing, namely the poly(4-vinylpyridine), or P-4PV. For such a material, the negative fragment emission is particularly sensitive to structural modifications. Difficult physical measurements in such an insoluble and infusible material (IR, UV - Vis, EPR, TGA, dielectric measurements) became consistent after the degradation mechanisms were elucidated. These effects, interpreted in terms of scissions and recombinations, enabled us to explicit different modes of energy deposition, and shed light on some discrepancies between SIMS and PDMS. The second part of the study is devoted to the thermal ageing of an elastomer, used in fabrication of valve gaskets submitted to high temperatures. First of all, we studied the constituents of the polymeric material, i. e. copolymer, homo polymers, and  More>>
Authors:
Nsouli, B [1] 
  1. Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire
Publication Date:
Jul 20, 1995
Product Type:
Thesis/Dissertation
Report Number:
LYCEN-T-9545
Reference Number:
SCA: 360605; 440101; PA: AIX-29:040386; EDB-98:088264; SN: 98001989393
Resource Relation:
Other Information: DN: 187 refs.; TH: Theses (Ph.D); PBD: 20 Jul 1995
Subject:
36 MATERIALS SCIENCE; 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; AGING; ARGON IONS; CHEMICAL RADIATION EFFECTS; COPOLYMERS; DESORPTION; ELASTOMERS; ENERGY ABSORPTION; GAMMA RADIATION; ION EMISSION; ION EXCHANGE; IRRADIATION; MASS SPECTROSCOPY; MEV RANGE 01-10; RADIATION DOSES; RADIATION HARDENING; RADIOACTIVE EFFLUENTS; RADIOLYSIS; REPROCESSING; RESINS; SECONDARY EMISSION; TIME-OF-FLIGHT METHOD
OSTI ID:
637938
Research Organizations:
Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Other: ON: DE98629833; TRN: FR9810024040386
Availability:
INIS; OSTI as DE98629833
Submitting Site:
FRN
Size:
170 p.
Announcement Date:

Citation Formats

Nsouli, B. The influence of the PDMS technique in the study of the induced modifications of polymers used in nuclear environment; Apport de la technique PDMS a l`etude des modifications induites dans des polymeres utilises en ambiance nucleaire. France: N. p., 1995. Web.
Nsouli, B. The influence of the PDMS technique in the study of the induced modifications of polymers used in nuclear environment; Apport de la technique PDMS a l`etude des modifications induites dans des polymeres utilises en ambiance nucleaire. France.
Nsouli, B. 1995. "The influence of the PDMS technique in the study of the induced modifications of polymers used in nuclear environment; Apport de la technique PDMS a l`etude des modifications induites dans des polymeres utilises en ambiance nucleaire." France.
@misc{etde_637938,
title = {The influence of the PDMS technique in the study of the induced modifications of polymers used in nuclear environment; Apport de la technique PDMS a l`etude des modifications induites dans des polymeres utilises en ambiance nucleaire}
author = {Nsouli, B}
abstractNote = {The PDMS technique (Particle Induced Desorption Mass Spectrometry) combined with a TOF detection (Time of Flight) is the main tool used in this study of polymer degradation in nuclear environment. Ar{sup 3+} ions with a 9 MeV energy have been used to induce the secondary ion emission, and the study was devoted to two stresses typical of this type of environment. The first part of the work concerned with the structural modifications induced by gamma irradiation on ion exchange resin, used for nuclear effluents reprocessing, namely the poly(4-vinylpyridine), or P-4PV. For such a material, the negative fragment emission is particularly sensitive to structural modifications. Difficult physical measurements in such an insoluble and infusible material (IR, UV - Vis, EPR, TGA, dielectric measurements) became consistent after the degradation mechanisms were elucidated. These effects, interpreted in terms of scissions and recombinations, enabled us to explicit different modes of energy deposition, and shed light on some discrepancies between SIMS and PDMS. The second part of the study is devoted to the thermal ageing of an elastomer, used in fabrication of valve gaskets submitted to high temperatures. First of all, we studied the constituents of the polymeric material, i. e. copolymer, homo polymers, and also additives. This last component proved useful to analyze, as a superficial lubricant layer can mask the conformational rearrangements which seem to occur after few hours of thermal treatment (PE blocks are prevailing at the surface). Here too, the PDMS information is important to account for static SIMS and ESCA results, as its probed layer thickness lies in-between. (author) 187 refs.}
place = {France}
year = {1995}
month = {Jul}
}