Soleimani, Adel published the artcileSynthesis, Characterization and Thermal Properties of Intrinsic Self-Healing Polyurethane Nanocomposites, Name: Propyl 3,4,5-trihydroxybenzoate, the publication is ChemistrySelect (2022), 7(16), e202103978, database is CAplus.
A hybrid thermo-reversible crosslinking polyurethane nanocomposite containing 0.5, 1, and 2 weight% of nano-silica was prepared with three intrinsic self-healing bonds (reversible covalent bonds supported by intrinsic hydrogen bonds and dangling chains). Owing to the introduction of pseudo-tannin and polyester diol that could form phenol-urethane networks and using nano-silica that causes dangling chains and hydrogen bonds, the prepared polyurethanes are capable of being reversed at 110°C and rejoin at low temperatures Thermoset self-healing polyurethane nanocomposites are prepared from pseudo-tannin, nano-silica, and a urethane-based prepolymer. The investigations of chem. structure, self-healing behavior, and crosslink network are carried out by Fourier Transform IR Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC) technique, and swelling test. Dissociation of phenolic urethane at 110°C was confirmed by temperature variable FTIR. By swelling test, it was found that the self-healing polyurethane nanocomposites with 0.5 weight% of nano-silica have the most hard-domain, gel content, and crosslink d. in the samples. DSC technique shows that polyurethane samples have two heat transfer transitions (dangling chains and self-healing). Thermogravimetric anal. (TGA) findings show that nanocomposites decompose at elevated temperatures than neat PU, and the rate of degradation diminishes as silica content increases.
ChemistrySelect published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C11H21BF4N2O2, Name: Propyl 3,4,5-trihydroxybenzoate.
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