Curable polyfarnesene-based compositions

A curable composition comprising an amine-terminated polyfarnesene and one or more isocyanate-group containing compounds, the one or more isocyanate-group containing compounds having an isocyanate group functionality of at least two and the amine-terminated polyfarnesene comprising:

• a hydrophobic polymer chain derived from at least one monomer comprising farnesene;
• wherein the amine-terminated polyfarnesene is obtained by:
• combining one or more polyols comprising a polyfarnesene polyol having terminal hydroxyl groups with a base to form a mixture;
• adding acrylonitrile to the mixture to form a reaction mixture;
• reacting the reaction mixture via Michael Addition of the acrylonitrile to the terminal hydroxyl groups to form a cyanoalkylated polymer having terminal cyanoalkylate groups;
• and
• hydrogenating the terminal cyanoalkylate groups in the presence of anhydrous ammonia to form the amine-terminated polyfarnesene;
• wherein the curable composition produces a polymer having a backbone derived from the monomers comprising farnesene.