Mechanical and Thermal Properties of Networks Prepared from Reactive Poly(urethane-imide)s and Blocked Polyurethane Prepolymer

Fluorescence, Thermal, Electrochemical, and Morphological Properties of New Poly(Urethane-İmide)s: Synthesis and Characterization

“…Numerous studies have been carried out to understand their both chemical and physical properties and structures (13)(14)(15). Moreover, their thermal stabilities have been studied thus far (16,17). However, only a few studies have been reported on fluorescence and electrochemical properties of poly(urethane-imide)s (PUIs) up till now (18,19).…”

Synthesis, Characterization and Properties of Novel Poly(urethane‐imide) Networks as Electrical Insulators with Improved Thermal Stability

“…of these polymers disappear above 80-90 8C and thermal degradation takes place above 200 8C. [2,3] Due to their special properties, like low dissipation factor and dielectric constant, [4][5][6] polyurethanes have found a wide range of applications as insulating materials in the electrical industry. However, the low service temperature of polyurethane-based electrical insulators is still a challenging problem.…”

Direct synthesis of soluble and thermally stable poly(urethane-imide)s from a new triimide–dicarbonylazide

“…Scheme 1 outlines the synthesis route of the new monomer. The chemical structure and purity of the resulting triimidedicarbonylazide were confirmed by FT-IR, 1 H NMR, 13 C NMR and elemental analysis. The FT-IR spectrum of compound 3 showed absorption peaks at about 2115, 1230 (asymmetric and symmetric azido group stretching), 1780, 1720 (asymmetric and symmetric imide CaO stretching), 1685 (carbonyl azide CaO stretching) and 1360 cm K1 (imide ring vibration, axial) confirming the structure of the monomer.…”

“…Attempts to improve the thermal stability of polyurethanes have been made over a long period, and this property can be improved by chemical modification of their structure by blending or copolymerization with more thermally stable polymers such as polyimides. Various attempts have been made to incorporate imide heterocyclic units into polyurethane backbone [11][12][13][14][15][16][17]. On the other hand, the most heat resistant homopolyimides have almost poor processability because of their insolubility in common organic solvents.…”