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The Effect of the Permeability of Elastomeric Tooling on Composite Materials

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The Effect of the Permeability of Elastomeric Tooling on Composite Materials


Elastomeric materials are used as tooling for the manufacturing of composites due to their flexibility and their ability to change cross-section under pressure. Some of the applications include bladders and barrier layers that distribute pressure during the curing process. Different elastomers have different, temperature dependent gas permeabilities, which is a design consideration for elastomeric tooling. In this study, the gas permeability of different elastomers at room temperature and 180°C has been compared together with the effect on the surface quality and porosity of the composite structures. The effect of different curing configurations on laminate porosity has also been considered. It is has been observed that viton is less permeable than silicone at room temperature and 180°C. Both materials result in composite porosity when directly used as gas barrier layer that correlates with the material permeability. A tri-layer approach to eliminate gas flow to the composite completely has also been demonstrated.


Author: Mathias Hecht, Finley Miller, and Robert Harshberger


Conference: SAMPE Seattle 2017


SKU/Code: SE17--0575

Pages: 11


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