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Microstructural Evaluation of Polymer Nanocomposites as Rocket Ablative Materials

Fig. 1 shows the microstructure of carbon nanofiber (CNF)-reinforced nanocomposites. Fig. 1a depicts the SC-1008 phenolic resin matrix reinforced by a mixture of 10 wt% CNFs and 20 wt% carbon black (CB) particles, with agglomerations of CBs and CNFs. In the absence of CB particles (Fig. 1b), the dispersion of CNFs was improved. The CB particles caused interference in dispersion of CNFs and CBs in the polymer matrix. Fig. 1c shows a good dispersion of CNFs in the polyester polycaprolactone resin matrix (Pellethane 2102 series).