Kot, David published the artcilePorous graphite as stationary phase for the chromatographic separation of polymer additives – determination of adsorption capability by Raman spectroscopy and physisorption, Related Products of piperidines, the main research area is porous graphite stationary phase chromatog separation polymer additive antioxidant; adsorption capability Raman spectroscopy physisorption polyolefin light stabilizer; Adsorption potential distributions; Brunauer emmett teller (BET) method; HPLC of polymer additives; Polyolefins; Porous graphitic carbon; Raman spectroscopy.
Additives are added to polymers in small concentration to achieve desired application properties widely used to tailor the properties. The rapid diversification of their mol. structures, with often only minute differences, necessitates the development of adequate chromatog. techniques. While modified silica so far is the workhorse as stationary phase we have probed the potential of porous graphitic carbon (HypercarbTM) for this purpose. The results show that the multitude of physicochem. interactions between analyte mols. and the graphitic surface enables separations of polyolefin stabilizers with unprecedented selectivity. To support the chromatog. results the adsorption capability of HypercarbTM for selected antioxidants and UV absorbers was determined by Raman spectroscopy and argon physisorption measurements. The shift of the Graphite-band in the Raman spectra of HypercarbTM upon infusion with additives correlates with the changes in the Adsorption Potential Distributions. The results of argon physisorption measurements go hand in hand with the chronol. of desorption of the additives in liquid chromatog. experiments The elution sequence can be explained by van der Waals or London forces, π-π-interactions and electron lone pair donor-acceptor interactions between the graphite surface and analyte functional groups.
Journal of Chromatography A published new progress about Antioxidants. 52829-07-9 belongs to class piperidines, name is Bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate, and the molecular formula is C28H52N2O4, Related Products of piperidines.
Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem