Triazine functionalized hydroxyl terminated polybutadiene polyurethane: Influence of triazine structure

摘要: Abstract In the present work, we have examined role of triazine based functional moieties namely cyanuric chloride (CYC), 2-chloro-4, 6-bis (dimethylamino)-1, 3, 5-triazine (CBDT) and 1-chloro-3, 5-diazido-2, 4, 6-triazine (CDT), which are attached to terminal carbons hydroxyl terminated polybutadiene (HTPB), on structure-property polyurethanes (PUs). Triazine HTPB, called as modified was polymerized with varieties diisocyanates resulting PUs were further cured at 70 °C for 5 days prepare free-standing elastic PU films. Thorough spectroscopic studies (FT-IR 13 C CP-MAS solid state NMR) films could not identify any hydrogen bonding interactions between urethane bonds rings in soft segment (HTPB segment) but revealed presence favorable electrostatic interaction them because electron rich nature polar substituents ring. An in-depth small angle X-ray scattering study along morphological carried out by scanning microscopy confirmed that is driving force formation nanometer size mass fractals hard domains (HSD) HTPB-PU. Tensile strength mechanical stability HTPB-PU found be better than native owing HSD. The current also influence position ring properties PUs. donating dimethyl amine groups CBDT segregation chain responsible strong photoluminescence HTPB-CBDT-PU film compared all other HTPB-PUs.