How can we improve the impact resistance of polyurethanes?

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Billa Narasimha Rao

May I know which isocyanate gives better impact strength?

Abdelkader BOUAZIZ

Dear Billa Narasimha Rao, better and will be to find a ratio between polyol/polyether which tighly tune the mechanical properties. My Regards

Doufnoune RACHIDA Rachida

Hi;

Please see the reference below:

Ehrlich, B. S., Farrissey, W. J., Goldwasser, D. J., Oertel, R. W., & Onder, K. (1984). A High-Impact Polyurethane Engineering Thermoplastic. Journal of Elastomers & Plastics, 16(2), 136–146. doi:10.1177/009524438401600207.

My best regards

Thank you for your valuable time and suggestions.

My polyol is fixed and aromatic isocyanates cannot be used as per the environmental concern and biological applications.

Looking for other options.

Thanking you.

Arpan Biswas

Hi Billa,

You can use hexamethylene diisocyanate as a diisocyanate. You will be able to improve the impact resistance by using some 2D nanoparticles like clay and also by increasing the HSC%.

Thank you Arpan...

Any other synthetic way?

Increasing the HSC% killing elongation/flexibility.

With Regards

Narasimha