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Dissolution of voids during compression moulding of SMC
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0002-1033-0244
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
2010 (English)In: Journal of reinforced plastics and composites (Print), ISSN 0731-6844, E-ISSN 1530-7964, Vol. 29, no 12, p. 1826-1837Article in journal (Refereed) Published
Abstract [en]

During compression molding of sheet molding compounds air bubbles are formed that can deteriorate several properties of the final composite. The story of such bubbles is directly set by the local pressure distribution during pressing. A number of experiments have therefore been performed in order to derive the relation between the pressure and dissolution rate of some gases into relevant resins. The experimental results follow Henry's law up to a pressure of 0.7 MPa and the rate of dissolution is highest for CO2 in pure polyester. When applying the results to the process in focus it is found that even large bubbles can be dissolved into the liquid resin during manufacturing. Hence, there is a potential to produce parts with very low void content.

Place, publisher, year, edition, pages
2010. Vol. 29, no 12, p. 1826-1837
National Category
Fluid Mechanics and Acoustics
Research subject
Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-7722DOI: 10.1177/0731684409336369ISI: 000279124300007Scopus ID: 2-s2.0-77954071551Local ID: 6242a2c0-67fb-11de-9f57-000ea68e967bOAI: oai:DiVA.org:ltu-7722DiVA, id: diva2:980612
Note
Validerad; 2010; 20090703 (stlu)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Lundström, StaffanHolmgren, Allan

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