Eltayeb, Mohanad published the artcileCarbodiimide-Assisted Synthesis of High Purity Bis(cyclic carbonate) Under Atmospheric Conditions for Preparation of Non-Isocyanate Polyurethane, SDS of cas: 1761-71-3, the publication is Journal of Polymers and the Environment (2021), 29(6), 1880-1893, database is CAplus.
The cyclic carbonates as non-isocyanate polyurethane (NIPU) precursors are usually prepared via CO2 fixation under harsh conditions for a satisfactory conversion rate, which is energy-intensive. Herein, cyclic carbonate was prepared under ambient conditions with high purity and yield using a water-soluble ethyl-(N’,N’-dimethylamino)propylcarbodiimide hydrochloride (EDC) to provide a favored industrialization method. The glycerol carbonate was reacted with a furan-based dicarboxylic acid using EDC to evolve cyclic carbonates, followed by the aminolysis with different chem. structural amines to produce bio-based NIPUs. The effects of the reaction parameters on the yield and purity of bis(cyclic carbonate) were investigated. The results showed that the synthesized bis(cyclic carbonate) have a purity of 99% and a yield of > 70%. The different structures of the diamines exhibited different reactivity and mol. weights in the order of multi-functional amine > linear amine > cyclic amine. All the synthesized furan-based NIPUs presented excellent thermal stability above 350°C and glass transition temperature in the range of 51.9°C to 99.6°C. The result demonstrates the potential of this environmentally benign strategy to prepare high-performance bio-based NIPUs with interesting properties even for biomedical applications.
Journal of Polymers and the Environment published new progress about 1761-71-3. 1761-71-3 belongs to quinuclidine, auxiliary class Ploymers, name is 4,4-Diaminodicyclohexyl methane, and the molecular formula is C13H26N2, SDS of cas: 1761-71-3.
Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider