Please try https://www.astm.org/

If you find what you are looking for in this site, then fine. If not, then try the good old classic "Polymer Handbook" Edited by J. BRANDRUP, E. H. IMMERGUT, and E. A. GRULKE

Also, this reference from Research Gate may help,hopefully.

Mr. Nizar

Thank you for your useful answer

Regards

Hi Ahmed,

For some properties such as: density, young modulus, yield and tensile stress of polycarbonate and PU please see

http://www-mdp.eng.cam.ac.uk/web/library/enginfo/cueddatabooks/materials.pdf

Dear Mr. Taifor,

you can also find some basic properties at http://mits.nims.go.jp/index_en.html, but I am not sure if the desired data will be there. You have to check it.

Also, there is an application called "property prediction system," maybe can be helpful for you.

Best regards.

Mr. Kali,

Thank you but I couldn't access to the link.

I wonder why?

Sorry, I do not know, it works for me. Maybe you can try the primary address (http://mits.nims.go.jp/) and then chose the English language (up, in the middle).

Hope it will work, otherwise, the IP address will be the problem and I can not help.