Bio-based Non-Isocyanate Polyurethanes (NIPUs) were synthesized by bulk polyaddition of diamine with carbonated sunflower oil (CSFO). Carbonated vegetable oils were obtained by solvent-free mixture reaction of CO2 with epoxidized sunflower oil under the conditions (120 °C, 50 bar) and characterized by FTIR, 1H NMR, and 13C NMR. 108 more words
The performance of different esterification catalysts was studied for the use in synthesis of renewable polyesters from dimethyl itaconate (DMI), dimethyl succinate (DMS) and 1,4-butanediol (BD). 306 more words
The effectiveness of self-healing epoxy and polyurethane hybrid coatings filled with linseed oil (LO) containing nano-sized capsules, potassium ethyl xanthate and benzotriazole was investigated for self-healing and anti-corrosion performance on the copper metal films. 138 more words
Nanoparticles of some of the metal oxides are known to have high UV protective efficiency. The UV filtering efficiency of nanoparticles invariably depends on their size and stability in the dispersion. 233 more words
A coating composed by methyl phenyl silicone resin (PSi) and furan resin (FR) was prepared, and its curing mechanism, heat resistance, and anticorrosion properties were investigated by Fourier transform infrared spectroscopy, thermogravimetric analysis, electrochemical test, and chemical resistance test. 197 more words
Internal startups and corporate intrapreneurs are facing difficulties to scale, just like usual startups struggle at transforming their first customers in large business.
At the opposite of ‘start-up’ and ‘growth’ phases where metholologies blossom (as shown below), there is a lack of framework to support this stage: it’s the Death Valley for scaling-up innovation! 1,003 more words
t‐Butyl‐oxycarbonylated diamines (“di‐Boc‐carbamates”) are investigated as dicarbamate monomers for diamine/dicarbamate polymerizations. Polyureas (PUs) and polyurethanes (PURs) with high molecular weights are prepared from stoichiometric polymerizations of diamines or diols with N‐N′‐di‐t‐butyl‐oxycarbonyl isophorone diamine (DiBoc‐IPDC) using KOt‐Bu as a catalyst, while gelation is observed when an excess of DiBoc‐IPDC is used with respect to the diamines or diols. 51 more words
