Shape memory polymer nanocomposites

Published

Journal Article

The paper describes the fabrication and characterization of composites with a shape memory polymer matrix and SiC nanoparticulate reinforcements. Composites based on a SMP matrix are active materials capable of recovering relatively large mechanical strains due to the application of heat. The composites were synthesized from a commercial shape memory polymer resin system and particulate SiC with an average diameter of 300 nm. Composites with weight fractions of 10%, 20%, 30%, and 40% nanoparticulate SiC were fabricated by casting samples with sizes ranging from a few hundred microns to several millimeters. The former size scale is consistent with a microcasting process for manufacturing microelectomechanical systems. The micro-hardness and elastic modulus of the nanocomposites increased by approximately a factor of 3 with the addition of 40 wt% SiC into the base resin. Unconstrained strain recoverability of the nanocomposites was found to depend on the fraction of SiC. For 180° bend tests, the recoverability of the nanocomposites was perfect for SiC weight fractions below 40%. For 40 wt% SiC, permanent bend strains were discovered. Constrained bending recovery force in the nanocomposites was shown to increase by 50% with the addition of 20 wt% SiC. © 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

Full Text

Duke Authors

Cited Authors

  • Gall, K; Dunn, ML; Liu, Y; Finch, D; Lake, M; Munshi, NA

Published Date

  • December 3, 2002

Published In

Volume / Issue

  • 50 / 20

Start / End Page

  • 5115 - 5126

International Standard Serial Number (ISSN)

  • 1359-6454

Digital Object Identifier (DOI)

  • 10.1016/S1359-6454(02)00368-3

Citation Source

  • Scopus