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Ablative performance of graded polyetherimide nanocomposite foams
Many current thermal protection systems employ polymer resins as an ablative material. Foamed polymer nanocomposites usually exhibit improved thermal properties compared to the solid counterparts. This study evaluates the ablative performance of foamed polyetherimide (PEI)-Clay-Kraton (PCK) nanocomposites for thermal protection applications. PEI was compounded with nanoclay to improve the flame retardant property and Kraton to mitigate the loss of ductility. The PCK nanocomposite samples were foamed using a batch solid-state foaming process under variable saturation and foaming conditions. The ablative performance of the samples was analyzed based on a standard burn test with respect to the material composition and foaming condition. The results show that graded PCK composite foams can be obtained using the solid state foaming process. The porous structure can be controlled by adjusting the process conditions, including saturation time and pressure. It is further shown that the ablative performance of the nanocomposite foam can be optimized among clay loading, Kraton loading, and porosity of the foams.
Ablative performance of graded polyetherimide nanocomposite foams
Many current thermal protection systems employ polymer resins as an ablative material. Foamed polymer nanocomposites usually exhibit improved thermal properties compared to the solid counterparts. This study evaluates the ablative performance of foamed polyetherimide (PEI)-Clay-Kraton (PCK) nanocomposites for thermal protection applications. PEI was compounded with nanoclay to improve the flame retardant property and Kraton to mitigate the loss of ductility. The PCK nanocomposite samples were foamed using a batch solid-state foaming process under variable saturation and foaming conditions. The ablative performance of the samples was analyzed based on a standard burn test with respect to the material composition and foaming condition. The results show that graded PCK composite foams can be obtained using the solid state foaming process. The porous structure can be controlled by adjusting the process conditions, including saturation time and pressure. It is further shown that the ablative performance of the nanocomposite foam can be optimized among clay loading, Kraton loading, and porosity of the foams.
Ablative performance of graded polyetherimide nanocomposite foams
Jiang, Wei (author) / Sundarram, Sriharsha S. (author) / Wong, Derek (author) / Koo, Joseph H. (author) / Li, Wei (author)
2013
11 Seiten, Bilder, Tabellen, 23 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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