NOVEL POTENTIALLY BIODEGRADABLE POLYURETHANES FROM BIO-BASED POLYOLS

Authors

  • Dragana Radojčić Kansas Polymer Research Center, Pittsburg State University, 1204 Research Road, Pittsburg, KS, 66762
  • Mihail Ionescu Kansas Polymer Research Center, Pittsburg State University, 1204 Research Road, Pittsburg, KS, 66762
  • Zoran S. Petrović Kansas Polymer Research Center, Pittsburg State University, 1204 Research Road, Pittsburg, KS, 66762

DOI:

https://doi.org/10.7251/727

Abstract

Completely bio-based polyols, suitable for the preparation of rigid polyurethanes were synthesized from polyglycerol, lactic acid and fatty acids. Lactic units were introduced into the polyol structure by the ring opening addition of L-lactide to hydroxyl groups, in the presence of the titanium(IV) isopropoxide catalyst. To address the incompatibility issue of simple lactide–(poly)glycerol polyols with isocyanates, vegetable oil-based fatty acids were introduced into the polyol structure. Cast thermosetting polyurethane resins were prepared by reacting polyols with diphenylmethane diisocyanate. Polyurethanes were crosslinked glassy amorphous materials with tensile strength of ~ 60 MPa, flexural modulus of 0.9 - 2.3 GPa and notched Izod impact resistance of 30 - 80 J/m. These polyurethanes are potentially biodegradable.

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Published

2013-06-01