Synthesis and Polymerization of New Methacryloyl Ureas Carrying a Hindered Piperidine and a Hydroxyl Group

Abstract

New sterically hindered piperidine derivatives (10-17) were prepared by ringopening reaction of various oxiranes with the commercially available 2,2,6,6-tetramethylpiperidin-4-yl-amine. By the addition of these sterically hindered piperidine derivatives (10-17) on 2-methylacryloyl isocyanate, eight novel multifunctional methacryloyl ureas, containing a hindered piperidine and a hydroxyl group (M1-M8) were synthesized. Five of these new multifunctional methacryloyl urea monomers (M1-M5) were homopolymerized, and copolymerized with styrene and methyl methacrylate by AIBN as initiator at 70°C. The new methacryloyl urea monomers (M1-M8) and their polymers (P1-P13) were characterized by Fourier transform infrared and nuclear magnetic resonance spectroscopy and by gel permeation chromatagraphy.

Relativistic quasiparticle random phase approximation in deformed nuclei

“…In particular, RHB theory has been successfully applied to the study of many ground state properties in nuclei, and shows a high degree of accuracy in the reproduction of experimental data: masses and radii, shape coexistence [91,90,167], halos [82,117], Λ-hypernuclei [84,164], neutron and proton rich nuclei [162,10,86,85,88,87,156,89,80,15,104,168,111,122,149,143], rotational bands and nuclear magnetism [8,44,136,135,2,3,5,6], superdeformations [4,131,7,148,100], etc.…”