Journal ArticleDOI
Polymerization of styrene and methyl methacrylate in the presence of 2,2-diethyl-4,5,5-trimethyl-2,5-dihydroimidazol-1-oxyl
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In this article, it has been demonstrated that the nitroxyl radical makes it possible to control chain propagation in the polymerization of styrene and to synthesize polymers with relatively low polydispersity coefficients (<1.4).Abstract:
The polymerization of styrene and methyl methacrylate in the presence of 2,2-diethyl-4,5,5-trimethyl- 2,5-dihydroimidazol-1-oxyl has been studied. It has been demonstrated that the nitroxyl radical makes it possible to control chain propagation in the polymerization of styrene and to synthesize polymers with relatively low polydispersity coefficients (<1.4). The polymerization of methyl methacrylate in the controlled mode cannot be performed because of the occurrence of a side reaction related to hydrogen atom transfer.read more
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Journal ArticleDOI
3.10 - Nitroxide-Mediated Polymerization
TL;DR: The main achievements in nitroxide-mediated polymerization (NMP) from its discovery to late 2010 are discussed in this paper, where various synthetic approaches to nitroxides and alkoxyamines are first presented.
Journal ArticleDOI
pH-sensitive C-ON bond homolysis of alkoxyamines of imidazoline series with multiple ionizable groups as an approach for control of nitroxide mediated polymerization.
Mariya V. Edeleva,Igor A. Kirilyuk,Irina F. Zhurko,Dmitry A. Parkhomenko,Yuri P. Tsentalovich,Elena G. Bagryanskaya +5 more
TL;DR: It is shown that the pH value crucially affects the polymerization regime, changing it from the controlled to the uncontrolled mode, and the efficiency of NMP is known to be dependent on k(d) and k(c), both constants being dependent on the monomer structure.
Journal ArticleDOI
Controlled/living polymerization of methyl methacrylate using new sterically hindered imidazoline nitroxides prepared via intramolecular 1,3‐dipolar cycloaddition reaction
Journal ArticleDOI
Smart Control of Nitroxide-Mediated Polymerization Initiators' Reactivity by pH, Complexation with Metals, and Chemical Transformations.
TL;DR: This review describes various ways to reversibly change the rate of C–ON bond homolysis of alkoxyamines at constant temperature and increases the safety of (and control over) the nitroxide-mediated polymerization method.
References
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Journal ArticleDOI
Density‐functional thermochemistry. III. The role of exact exchange
TL;DR: In this article, a semi-empirical exchange correlation functional with local spin density, gradient, and exact exchange terms was proposed. But this functional performed significantly better than previous functionals with gradient corrections only, and fits experimental atomization energies with an impressively small average absolute deviation of 2.4 kcal/mol.
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Density-functional exchange-energy approximation with correct asymptotic behavior.
TL;DR: This work reports a gradient-corrected exchange-energy functional, containing only one parameter, that fits the exact Hartree-Fock exchange energies of a wide variety of atomic systems with remarkable accuracy, surpassing the performance of previous functionals containing two parameters or more.
Journal ArticleDOI
Density-functional approximation for the correlation energy of the inhomogeneous electron gas
TL;DR: Numerical results for atoms, positive ions, and surfaces are close to the exact correlation energies, with major improvements over the original LM approximation for the ions and surfaces.
Journal ArticleDOI
New polymer synthesis by nitroxide mediated living radical polymerizations.
Organic solvents: physical properties and methods of purification. Fourth edition
TL;DR: This new edition comes 16 years after the previous one, and it has about 30% more pages The format remains the same: tables of compounds arranged by structural type list all manner of useful properties, including not only melting and boiling points but density, refractive index, heat capacity, dielectric constant, etc as discussed by the authors.
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