info:eu-repo/semantics/article
Study of the ablative properties of phenolic/carbon composites modified with mesoporous silica particles
Fecha
2018-12-01Registro en:
Asaro, Lucía; Manfredi, Liliana Beatriz; Rodriguez, Exequiel Santos; Study of the ablative properties of phenolic/carbon composites modified with mesoporous silica particles; SAGE Publications; Journal of Composite Materials; 52; 30; 1-12-2018; 4139-4150
0021-9983
CONICET Digital
CONICET
Autor
Asaro, Lucía
Manfredi, Liliana Beatriz
Rodriguez, Exequiel Santos
Resumen
Mesoporous silica particles and carbon black were selected as fillers for a resol-type phenolic resin, to be used as a matrix for ablative materials. Composites were processed with the modified polymer and carbon fibers were used as continuous reinforcement. The ablative properties of the materials obtained were studied by the oxyacetylene torch test and the ablated samples were observed by scanning electron microscopy. Composites with 30 wt. % of carbon black achieved the lowest linear erosion rate and the highest insulation index, denoting the ability of the char produced to protect the virgin material. Considering that such composite has 44% by volume of carbon fibers, it could be inferred that its properties could be improved by increasing the fiber content and maintaining the amount of carbon black. The composite with 20 wt. % of mesoporous silica particles exhibited the lowest mass erosion rate, indicating a better stabilization of the char. Regarding dynamic-mechanical properties, the addition of particles induced a decrease in the modulus and glass transition temperature of all the systems studied.