Diamond thermogravimetric

Differential scanning calorimetry (DSC) analysis of the samples was carried out with a PerkinElmer (USA) Diamond thermogravimetric (TG)/DSC analyzer. The work was carried out with 20 milligram of the composite fibers sample filled in aluminum pans under a dynamic nitrogen atmosphere in a temperature range of 25–600 °C and a heating rate of 5 °C/min. The percentage of crystallinity Χ (%) was calculated as Equation (1): $\frac{\Delta H}{\Delta H_{100}}={\mathrm{X}}^{\mathrm{C}}$
where $\Delta H$ is the heat of crystallization of the sample analyzed (J/g), and $\Delta H_{100}$ is a reference value that represents the heat of crystallization for a 100% crystalline polymer. For PP, $\Delta H_{100}$ is taken as 209 J/g.

Thermogravimetric analysis was obtained on a Perkin Elmer Diamond Thermogravimetric device (PerkinElmer Inc., Waltham, MA, USA) under argon atmosphere using a temperature interval from 25 to 350 °C with a heating rate of 10 °C/min.