Void Content Minimization in Vacuum Infusion (VI) via Effective Degassing
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comunitat-uji-handle2:10234/7034
comunitat-uji-handle3:10234/8619
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INVESTIGACIONMetadata
Title
Void Content Minimization in Vacuum Infusion (VI) via Effective DegassingDate
2021-09-01Publisher
Multidisciplinary Digital Publishing InstituteISSN
2073-4360Bibliographic citation
Juan, J.; Silva, A.; Tornero, J.A.; Gámez, J.; Salán, N. Void Content Minimization in Vacuum Infusion (VI) via Effective Degassing. Polymers 2021, 13, 2876. https://doi.org/10.3390/polym13172876Type
info:eu-repo/semantics/articlePublisher version
https://www.mdpi.com/2073-4360/13/17/2876#citeVersion
info:eu-repo/semantics/publishedVersionSubject
Abstract
This paper addresses the major concern which component porosity represents in Vacuum
Infusion (VI) manufacturing due to resin gelation at pressures close to absolute vacuum. Degassing
is a fundamental step to minimize ... [+]
This paper addresses the major concern which component porosity represents in Vacuum
Infusion (VI) manufacturing due to resin gelation at pressures close to absolute vacuum. Degassing
is a fundamental step to minimize or even avoid resin outgassing and enhance dissolution of voids
created during preform impregnation. The efficacy of different degassing procedures based on
vacuum degassing, and assisted by adding a nucleation medium, High Speed (HS) resin stirring
and/or later pressurization during different time intervals have been analyzed in terms of final void
content is studied. Through a rigorous and careful design of the manufacturing process, outgassing
effects on final void content were isolated from the rest of porosity causes and specimens with
two clearly identifiable regions in terms of porosity were manufactured to facilitate its analysis.
Maximum void content was kept under 4% and porous area size was reduced by 72% with respect to
conventional vacuum degassing when resin was stirred at HS; therefore, highlighting the importance
of enhancing bubble formation during degassing. [-]
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Polymers 2021, 13, 2876.Rights
info:eu-repo/semantics/openAccess
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