The synthesis of 5-substituted 6,6a-dihydroisoindolo[2,1-a]quinolin-11(5H)-ones via [4 + 2] imino-Diels-Alder cyclization from N-aryl-3-hydroxyisoindolinones and N-vinyl lactams under Lewis acid-catalysed anhydrous conditions is reported. Reactions of N-(2-substituted-aryl)-3-hydroxyisoindolinones with N-vinylpyrrolidone under identical conditions resulted in the formation of 2-(2-substitued-ar...

With the goal to better process monitoring of occurring fouling, a backscatter probe was developed perform in-line measurements in half-shell reactor during reaction N-vinylpyrrolidone (NVP) polyvinylpyrrolidone (PVP). The measurement technique detects changes bands UV range, which allows direct correlation with concentration. Thus, measured absorbance signal conclusion on accumulation fouling ...

The effect of poly-N-vinylpyrrolidone on the size characteristics, morphology, composition particles obtained by reduction cobalt ions in aqueous solutions, and distribution over surface glass microspheres has been studied. absence leads to formation with a 200 nm microspheres. use made it possible obtain ranging from 30 300 nm, more localized resulting are mixture metallic oxides.

New nontoxic hydrophilic nanocomposites containing metallic silver nanoparticles (AgNPs) in a polymer matrix were synthesized by the chemical reduction of silver ions in an aqueous medium. A new nontoxic water soluble copolymer of 1-vinyl-1,2,4-triazole and N-vinylpyrrolidone synthesized by free radical-initiated polymerization was used as a stabilizing agent. Transmission electron microscopy, ...

Polymer fouling is a major problem for the operation of continuous reactors. Therefore, it important to understand and quantitatively describe mechanisms leading formation deposits. In this work, CFD model radical polymerization N-vinylpyrrolidone presented, where reaction kinetics, viscosity model, transport polymer moments are determined from independent experiments. The compared experimental...