Accession Number:

ADA614928

Title:

Bio-Based Polyurethane Containing Isosorbide for Use in Composites and Coatings

Descriptive Note:

Final rept. Dec 2011-Jan 2014

Corporate Author:

ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Report Date:

2015-04-01

Pagination or Media Count:

18.0

Abstract:

The purpose of this research is to formulate polyurethane 1 for use in composites or coatings that contain isosorbide as part or all of the polyol phase and 2 that can be easily molded or cast into a film at ambient conditions. Solubility studies were conducted to determine the maximum amount of isosorbide that could remain in solution with other diols. Formulation of polyurethanes using isosorbide as part or all of the polyol phase combined with monomers such as toluene diisocyanate TDI and isophorone diisocyanate IPDI in the isocyanate phase. TDI reactivity at ambient conditions was too extreme, while IPDI was not reactive enough. Prepolymerized polyisocyanates were studied with isosorbide and compared with a commercial polyurethane coating. The dynamic mechanical analysis showed that isosorbide as a drop-in replacement for the commercial polyol increased the Tg 17 C. However, ultraviolet exposure revealed that the polyurethane containing isosorbide does not perform as well as the commercial product with defects such as brittleness and delamination.

Subject Categories:

  • Coatings, Colorants and Finishes
  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE