Please did you have the XRD data?

If yes you need to use the Origin oder Highscope Plus software to evaluate the crystallinity by integrale method.

Extract/Calculate the melting enthalpy values of PE and PP by the DSC thermograms then use the well-known equation based on proportioning the experimental enthalpy value to the literature value of 100% crystalline form of polymer and normalizing this ratio considering the fractions of non-polymeric and amorphous components (TSP and clays in your case). Please find the equation in the paper, doi.org/10.1007/s10924-021-02065-x.

In your circumstances, total crystallinity in the system will be the sum of Xc values of PE and PP (if you clearly and individually define their melting endotherms).

Good luck.

Dear Saliha Chaoui :

Experimentally, you can do it with DSC (Differential Scanning Calorimetry).

You will have to determine the Entalphies:

Melting Entalphy & Glass Transition Entalphy

And with these values is it possible to determine the % of Crystallinity of the Polymer. There is a well known formula for this, as a function fo the Enthalpies.

Regards !

Thank you Fotsop Cyrille Ghislain for your answer. I am wondering to what extent could origin method be efficient in calculating cristallynity compared to DSC method? as we found a significant difference in a previous study between Origin and DSC methods.

Dear Fotsop Cyrille Ghislain

I have used this method "https://www.youtube.com/watch?v=u6LwremVt30", for calculating cristallinty by origin software in our previous work.

Dear Ali Durmus,

Thank your for answer, I am convinced by your answer to calculating cristallynity of nanocomposite by DSC using the sum of Xc values of PE and PP, because effectively our thermogrammes present tow meltings endotherms).

Best regards

Dear Franklin Uriel Parás Hernández

Thank you for your answer. It's new for me to use Glass Transition Entalphy for calculating of cristallynity, I d'ont know the formula for this.

Best regards.