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M. Oleksy, R. Oliwa, B. Zawiła, G. Budzik

Polyurethane compositions for rapid prototyping containing bentonites

modified with silsesquioxanes

Polimery 2012, No 6, 463


DOI: dx.doi.org/10.14314/polimery.2012.463

Summary

Cast polyurethane resins (PUR) filled with bentonites modified with silsesquioxanes (POSS) were prepared. The effect of amount and type of modified bentonites as well as the type of resin used on mechanical and processing properties of composites containing 1,5—4,5 wt. % nanofiller was studied. The addition of modified bentonites to the polyurethane resin resulted in the increase of tensile strength by 40 % and Charpy impact resistance by 70 %, however, the decrease in Rockwell hardness by 18 % was found. The structure of the composites resembled that of typical aluminosilicate clay/polymer nanocomposites with fine platelets morphology of brittle fractures observed by scanning electron microscopy (SEM) and the disappearance of the peak corresponding to the distance between bentonite platelets in WAXS diffractogram.


Key words: polyurethane resin, silsesquioxanes, POSS, smectite clays, organoclays, bentonites, montmorillonite, nanocomposites, mechanical properties

e-mail: molek@prz.edu.pl

M. Oleksy, R. Oliwa, B. Zawiła, G. Budzik (261.3 KB)
Polyurethane compositions for rapid prototyping containing bentonites modified with silsesquioxanes