Analysis of the Gamma Irradiation Effect on PTFE Films by FTIR and DSC

N. Saidi-Amroun (1) , Virginie Griseri (2) , S. Mouaci (1) , A. Mezouar (1) , G. Teyssedre (2) , M. Saidi (1)

1 USTHB - Université des Sciences et de la Technologie Houari Boumediene = University of Sciences and Technology Houari Boumediene [Alger]
2 LAPLACE-DSF - Diélectriques Solides et Fiabilité

Dielectric materials can be used in radiative environment that is why it is of major importance to determine their properties modifications with time. In this paper we focus our attention on PolyTetraFluoroEthylene (PTFE) films submitted to gamma radiations. We investigate the FTIR spectra and show that after exposure to Co 60 the crystallinity of the material is increasing. This result is confirmed by Differential Scanning Calorimetry (DSC) analysis. Some space charge distribution profiles obtained by the Pulse Electro Acoustic (PEA) method show that the irradiation favours the drift of injected charges toward the bulk. Obviously the dose of radiation must be carefully chosen in order to be able to perform electrical measurements. Indeed, we observed that if the radiation dose is too high the sample becomes fragile and most of the characterisation tools cannot be used.

Mots clés: PTFE; FTIR; DSC; space charge; gamma irradiation

Domaines: Matériaux; Polymères; Radiochimie

N. Saidi-Amroun, Virginie Griseri, S. Mouaci, A. Mezouar, G. Teyssedre, et al.. Analysis of the Gamma Irradiation Effect on PTFE Films by FTIR and DSC. IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP 2018), Oct 2018, Cancun, Mexico. pp.430-433, ⟨10.1109/CEIDP.2018.8544841⟩. ⟨hal-02396214⟩