Thermal degradation and stability of HTPB-based polyurethane and polyurethaneureas

A temperature-mapping molecular sensor for polyurethane-based elastomers

“…These temperatures are consistent with the lack of thermal degradation of the HTPB itself, which generally begins above 190 C. 10 Temperatures on the right hand side of the sample are slightly higher due to the precession of the bullet. A corkscrew pattern can be seen in the full sample as the nose of the bullet give precesses moving through the polymer.…”

Influence of the storage of reactive urethane quasi-prepolymers in their composition and adhesion properties

“…The TG curve displays three distinct regions of weight loss that correspond to three peaks in the DTG curve. Weight loss at temperatures lower than 100 1C can be due to the rupture of hydrogen bonds between hard segments [11]. The second peak, between 230 and 400 1C, corresponds to the rupture of urethane and urea linkages that normally occur at temperature slightly higher than 200 1C [12], and the third peak corresponds to the scission of the polyether polyol chains at around 350 1C.…”

Synthesis and properties of poly(urethane-imide) interpenetrating network membranes

“…There have many reports about the low oxidized stability of unsaturated double bond (C¼C) of HTPB segment through thermal treatment. Chiu and coworkers [24,25] have reported that the oxidation or broken reaction of the unsaturated double bond (C¼C) of HTPB-based PU, under 60 C, 30 days, does not happened. While the oxidation or broken reaction of the unsaturated double bond of HTPB will be produced to form carbonyl groups at temperature higher than 100 C. Meanwhile, the unsaturated double bond between different HTPB segments may be crosslinked together through oxidation or broken reaction.…”