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

Abstract

New thermally stable poly(urethane-imide)s (PUIs) were synthesized to investigate aliphatic and aromatic group effects on various properties such as thermal stability and electrochemical properties. Thermal characterizations were carried out by TG-DTA and DSC techniques. TGA results showed that the PUIs derived from aromatic diisocyanates had relatively higher thermal stabilities as compared to the aliphatic diisocyanate. They have between 223-245 • C onset temperature and above 37% char at 1000 • C. Also, thermal degradation values show that PUIs have higher stability than conventional PU. DSC results showed that the new PUIs have Tg values between 134 and 138 • C. Fluorescence measurements were performed using dimethyl sulfoxide solutions and also, the optimization of the concentrations maximal emission intensity was investigated in dimethyl sulfoxide. As a result, the remarkable properties related to the fluorescence and thermal measurements of the polymers were obtained. Therefore, these polymers could be used in various application fields because of the fluorescent and thermal properties.

Novel disulfide-containing diols: synthesis and application in self-healing fluorescent polyurethane elastomers

“…This was mainly the result of the introduction of aromatic-containing disulfide structures. 42 Fig. 9(b) illustrates the emission spectra of the self-healing fluorescent polyurethane elastomer films.…”

“…At 366 nm excitation, the peak position of esterified DTSA showed a slight red shift, shifting from 453 nm to 455 nm, and the peak intensity increased with the length of the disulfide-containing dithiol chain. This was mainly the result of the introduction of aromatic-containing disulfide structures 42. Fig.…”

Synthesis and characterization of poly(urethane-imide) nanocomposite films filled with iron oxide–silica and clay–silane–iron oxide nanoparticles

“…Polyimides (PIs) are the most important heterocyclic polymers with remarkable heat resistance and excellent mechanical, electrical, chemical and stability properties. 15 Incorporation of imide functional groups in the PU main chain led to the poly(urethane-imide) (PUI) by having excellent properties of both PU and PI, such as good mechanical properties, high mechanical strength, thermal stability, electrical insulating properties, chemical resistance, hydrolysis resistance, radiation resistance, abrasion resistance, biological compatibility, etc. Reacting an isocyanate-terminated PU prepolymer with dianhydride is a convenient method to introduce the imide function into the PU backbone.…”