Self-metathesis of the terminal olefin in 10-undecen-1-ol was conducted in the presence of [RuCl2(PPh3)2(perhydroazepine)] complex and ethyl diazoacetate (EDA) to form a bioderived diol. The diol was utilized as soft segment and chain extender in polyurethane reactions with castor oil. Polymers with high Mw and Mn values and PDI's of 2 and 3 were obtained. The viscoelastic material parameters (G′, G″ and η*) were studied as a function of angular frequency at different temperatures and diol/castor oil compostions. Newtonian behavior was observed for these materials. Tg values were more negative when increasing the diol percentage because the material became more viscoelastic. At only 10 wt% of the diol, an adhesive characteristic was observed in the castor oil-based polyurethane. Modifying the castol oil-based polyurethane with 10 wt% of the diol was able to modify the rigid polyurethane, providing an adhesive characteristic to castor oil-based polyurethane.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry