Solubility parameter of HTPB polyurethanes determinationThe solubility parameter of a series of segmented polyurethanes was determined through equilibrium swelling experiments, using the Flory-Rehner theory. The soft segment of the polyurethanes was oligobutadiene and the hard block was formed through the reaction of tolylene diisocyanate with propanediol, butanediol, hexanediol or 2, 2' dihydroxy isopropyl N, N' aniline. The hard segment content in all polymers was about the same for the aliphatic extenders (25.1% to 28.3%) and 32.6% for the aromatic one.
Polyurethane; hydroxyl terminated polybutadiene; solubility parameter
