Outgassing rates of PEEK, Kapton® and Vespel® foils

The outgassing rates of PEEK, Vespel® and Kapton® foils as a function of time and thickness have been studied through a series of pump-down tests. Samples of at least five different thicknesses for each material, exposed to normal levels of moisture in the air (30-65% R.H.), were pumped in a dedicat...

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Autores principales: Sammartano, Sergio Giacomo, Wevers, Ivo, Bregliozzi, Giuseppe, Chiggiato, Paolo
Lenguaje:eng
Publicado: 2020
Materias:
Science in General
Acceso en línea:http://cds.cern.ch/record/2723497
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author Sammartano, Sergio Giacomo
Wevers, Ivo
Bregliozzi, Giuseppe
Chiggiato, Paolo
author_facet Sammartano, Sergio Giacomo
Wevers, Ivo
Bregliozzi, Giuseppe
Chiggiato, Paolo
author_sort Sammartano, Sergio Giacomo
collection CERN
description The outgassing rates of PEEK, Vespel® and Kapton® foils as a function of time and thickness have been studied through a series of pump-down tests. Samples of at least five different thicknesses for each material, exposed to normal levels of moisture in the air (30-65% R.H.), were pumped in a dedicated setup. The pump down curves were fitted with a Fickian diffusion model. A discrepancy between the model and the experimental results was observed for extended pump down time. A new empirical model was proposed and applied with excellent results. The discrepancy could be due to micro-voids in the vitreous parts of the polymers as described by the dual model.
id cern-2723497
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2020
record_format invenio
spelling cern-27234972020-07-13T19:57:34Zhttp://cds.cern.ch/record/2723497engSammartano, Sergio GiacomoWevers, IvoBregliozzi, GiuseppeChiggiato, PaoloOutgassing rates of PEEK, Kapton® and Vespel® foilsScience in GeneralThe outgassing rates of PEEK, Vespel® and Kapton® foils as a function of time and thickness have been studied through a series of pump-down tests. Samples of at least five different thicknesses for each material, exposed to normal levels of moisture in the air (30-65% R.H.), were pumped in a dedicated setup. The pump down curves were fitted with a Fickian diffusion model. A discrepancy between the model and the experimental results was observed for extended pump down time. A new empirical model was proposed and applied with excellent results. The discrepancy could be due to micro-voids in the vitreous parts of the polymers as described by the dual model.CERN-ACC-NOTE-2020-0039oai:cds.cern.ch:27234972020-07-13
spellingShingle Science in General
Sammartano, Sergio Giacomo
Wevers, Ivo
Bregliozzi, Giuseppe
Chiggiato, Paolo
Outgassing rates of PEEK, Kapton® and Vespel® foils
title Outgassing rates of PEEK, Kapton® and Vespel® foils
title_full Outgassing rates of PEEK, Kapton® and Vespel® foils
title_fullStr Outgassing rates of PEEK, Kapton® and Vespel® foils
title_full_unstemmed Outgassing rates of PEEK, Kapton® and Vespel® foils
title_short Outgassing rates of PEEK, Kapton® and Vespel® foils
title_sort outgassing rates of peek, kapton® and vespel® foils
topic Science in General
url http://cds.cern.ch/record/2723497
work_keys_str_mv AT sammartanosergiogiacomo outgassingratesofpeekkaptonandvespelfoils
AT weversivo outgassingratesofpeekkaptonandvespelfoils
AT bregliozzigiuseppe outgassingratesofpeekkaptonandvespelfoils
AT chiggiatopaolo outgassingratesofpeekkaptonandvespelfoils

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