Form-stable composite PCM can be fabricated at the designed paraffin-to-EVM-800 weight ratio of 0.6:1.0. This composite
PCM has an onset melting phase change temperature of 27.0 ± 0.1 C and latent heat of 77.6 ± 4.3 J/g.
The SEM and FTIR results show that the paraffin is well impregnated into the interlayer spaces of EVM-800, and the paraffin and EVM-800 are chemically inert.
Moreover, the excellent thermal stability of this composite PCM is clearly revealed from the TGA results.