Synthetic Route of 57-13-6, As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world. 57-13-6, Name is Urea, SMILES is NC(N)=O, belongs to amides-buliding-blocks compound. In a article, author is Nechipadappu, Sunil Kumar, introduce new discover of the category.
The current synthetic procedures for polyaramids mainly involve the use of amide solvents such as N-methylpyrrolidone and N,N-dimethylacetamide. However, these solvents are suspected to be teratogenic and are considered ‘Substances of Very High Concern’ by the European Commission. Here we propose a benign alternative solvent system: an Organic Electrolyte Solution (OES) consisting of gamma-valerolactone (GVL) and a small amount of the ionic liquid 1-methyl-3-octylimidazolium chloride, [C(8)MIm][Cl]. Three commercially relevant polyaramids were synthesized: poly-p-phenylene terephthalamide (PPTA), poly-m-phenylene isophthalamide (PMIA) and copoly(p-phenylene/3,4 ‘-diphenylether terephthalamide) (ODA/PPTA). PMIA was successfully synthesized in the OES containing [C(8)MIm][Cl] in a molar fraction of x(IL) = 0.043, achieving an inherent viscosity of eta(inh) = 1.94 +/- 0.064 dL g(-1), which is on par with the current industrial standard and the benchmark lab scale synthesis. The reaction mixture could also be directly used for the wet spinning of polyaramid fibers, and all components of the solvent could be recycled in good yields by a series of evaporation and distillation steps. ODA/PPTA could be synthesized, but only rather low inherent viscosities were achieved. The reaction mixture was too viscoelastic to be spun by our small-scale spinning setup. PPTA always instantly precipitated and could not be synthesized from a [C(8)MIm][Cl]/GVL OES. alpha-Picoline, the organic base which was added to capture the released HCl during the reaction, was found to play a pivotal role in the polymerization reaction. By undergoing an acid-base reaction with HCl, it forms a protic ionic liquid in situ which increases the solubility of the polymer.
Synthetic Route of 57-13-6, Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 57-13-6.
Reference:
Amide – Wikipedia,
,Amide – an overview | ScienceDirect Topics