As a suggestion, you can see the following article.

https://www.researchgate.net/publication/313838885_Toughening_of_epoxy_hybrid_nanocomposites_modified_with_silica_nanoparticles_and_epoxidized_natural_rubber

dera Ahmad Mustafa ;

you can read these articles sir ;

Article Effects of Liquid Natural Rubber (LNR) on the Mechanical Pro...

Article Toughening of epoxy hybrid nanocomposites modified with sili...

Dear Mahdi and Mohamood

Thank you very much for your reply. Kindly note that I need the synthesis steps of rubber nanoparticles. The research suggested by your respected side uses epoxidized rubber nanoparticles that were purchased directly from vendor.

Regards

I would do it with cryogenic milling

when you freeze the rubber you can mill it