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Effect of Carbon Nanofiber Functionalization on the Dispersion and Physical and Mechanical Properties of Polystyrene Nanocomposites by Octavio Morales‐Teyssier; Saul Sánchez‐Valdes; Luis Francisco Ramos‐de Valle is a Materials Science article available to read on EtoBox.

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## Abstract **Summary:** The effect of peroxide functionalization of carbon nanofibers (CNF) on the physical and mechanical properties of polystyrene (PS)–CNF nanocomposites prepared via melt mixing was studied. The CNF functionalization was evidenced by Raman spectroscopy, comparing the ratio of peaks at 1 371 and at 1 590 cm^−1^ (peaks related to the disordered sp^3^‐hybridized carbon atom and to the graphitic structure of the sp^2^‐hybridized carbon atoms, respectively). The variation of the storage (__E__′) and tensile modulus (__E__) of the PS–CNF composites as a function of the untreated and peroxide treated CNF concentration were evaluated. Three different peroxide concentrations were used for treating the CNF. It was found that both __E__′ and __E__ increase with CNF concentration and, in addition, increase further with the peroxide treated CNFs. Nonetheless, it was found that the greater the peroxide concentration used in treating the CNF, the greater the PS degradation via free radical attack on the polymer chain, with the corresponding negative effect on the storage and tensile modulus. Dispersion of the CNF was assessed using scanning and optical microscopy, and the pos

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Author

Octavio Morales‐Teyssier; Saul Sánchez‐Valdes; Luis Francisco Ramos‐de Valle

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 1438-7492)

Published

2006

Language

EN

Field

Materials Science (Physical Sciences)