In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 17057-04-4, name is 4-(2,5-Dioxo-2,5-dihydro-pyrrol-1-yl)-benzoicacid, introducing its new discovery. Product Details of 17057-04-4
Organogelation behavior, thermal and mechanical properties of polymer network formed by the Diels-Alder reaction of furan- and maleimide-terminated four-arm star-shaped epsilon-caprolactone oligomers
Furan- and maleimide-terminated 4-arm star-shaped epsilon-caprolactone oligomers (F4CLO and M4CLO) were synthesized by the reactions of hydroxy-terminated 4-arm star-shaped epsilon-caprolactone oligomers (H4CLO) having the degree of polymerization per one oligocaprolactone chain, n = 5 or 10 with furfuryl isocyanate and 4-(maleimidophenyl)isocyanate, respectively. Solutions of F4CLO/M4CLO or F4CLO/4,4?-bismaleimidediphenylmethane (BMI) in some organic solvents changed to gels by the Diels-Alder (DA) reaction at 50 C or room temperature, which came back to solutions by the retro-DA (rDA) reaction at 80 C. The thermo-reversible sol-gel process due to the DA and rDA reactions was monitored by 1H NMR and GPC analyses. DSC and XRD analyses of polymer network formed by the DA reaction revealed that the network composed of the oligocaprolactone chain of n = 10 is semicrystalline, while that of n = 5 is amorphous. The former polymer network showed higher tensile strength and modulus than the latter.
We¡¯ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, the role of 17057-04-4, and how the biochemistry of the body works.Product Details of 17057-04-4
Reference£º
Pyrroline – Wikipedia,
1-Pyrroline | C4H7N – PubChem