Shape-Memory Epoxy Reinforced by Porous Graphite of Different Exfoliation Degrees
- 1 Downloads
Epoxy-based shape memory polymer (ESMP) suffers from low mechanical strength, thermal stability and shape fixity ratio (Rf) which are restricting its practical applications. In order to reinforce the ESMP, in this research, porous graphite materials synthesized by low-temperature (250°C) reduction and exfoliation of graphite oxide (GO) were added into the polymer by a three-roll mill. The addition of porous graphite was proven to increase the thermal degradation temperature, storage modulus and Rf of ESMP. Different exfoliation degrees of the porous graphite resulted in different enhancement effects on the ESMP matrix. And the porous graphite with a higher exfoliation degree has a more efficient reinforcement on the polymer. Shape fixity tests indicated the porous graphite reinforced ESMP composites had higher Rf than pure ESMP. Shape memory tests showed the porous graphite with a lower exfoliation degree could delay the shape recovery of ESMP, while the porous graphite with a higher exfoliation degree resulted in a shorter shape recovery time than pure ESMP.
Unable to display preview. Download preview PDF.
- 1.K. Otsuka and C. M. Wayman, Shape Memory Materials (Cambridge University Press, Cambridge, UK, 1998).Google Scholar
- 16.L. Chen, W. Li, Y. Liu, and J. Leng, J. Appl. Polym. Sci. 132, 42502 (2015).Google Scholar