Interphase in polymer-based nanocomposites: Polyoctenamer – Single-walled carbon nanotubes

•Non-isothermal thermogravimetric analysis of polyoctenamer-single walled carbon nanotubes in nitrogen atmosphere.•Detailed analysis of thermograms empiric criteria such as the temperature at which residual mass reaches x% (wt.), Tx%.•In-depth analysis of the derivative of the thermograms versus temperature as a function of temperature. Inflection points coordinate analysis.•Modelling the polymer interphase and the bulk polymer as a compatible polymer blend.•Estimation of the interphase weight fraction/thickness based on Fox equation.