Titlebook: Recent Advances in Anionic Polymerization; Proceedings of the I Thieo E. Hogen-Esch,Johannes Smid Conference proceedings 1987 Elsevier Scie

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Mechanistic Aspects of the Reversibility and Irreversibility of the Anionic Polymerization of α-Meth strict reversibility of a polymerization are defined. Deviation from strict reversibility for polymerization in bulk and in non-polar solvent is discussed together with its implication for thermodynamic studies based on data obtained from the equilibrium polymerization. In the case of the bulk poly

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Donor-Acceptor Interactions of the Active Centres of Chain Propagation in the Anionic Polymerizationquantitative evidence and conclusions. Much of the published data on principle parameters are contradictory and insufficiently reliable. The only exceptions are the polymerizations of methyl methacrylate . and the vinyl pyridines ..

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Pyridine-Mediated Anionic Homo-and Copolymerization of Alkylmethacrylateylacrylamide, ε-caprolactone and alkylmethacrylate. Pyridine gives rise to monodisperse polymethylmethacrylate (PMMA) at a temperature higher than normally observed. We believe this reflects a new mechanism, involving a living polymerization, which should have profound implications for the design of

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Kinetics and Mechanisms in the Anionic Polymerization of Methacrylic Estersdistributions. From the kinetics of polymerization and from the microstructure of the polymers the existence of different active species is concluded, the most important one being a peripherally solvated contact ion pair. Depending on polymerization conditions two different modes of monomer addition

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Stereoelective Anionic Polymerization of Chiral Vinyl Monomers Via Interconverting Ion Pair Epimersll of the possible diastereomeric ion pair epimers are assumed to be formed initially. Stereoelection is assumed to be absolute and controlled by the chiral centers at the end of the growing chain. The ion pair is considered the last chiral center. The resulting diastereomeric dyads, triads, and tet

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Conference proceedings 1987ers all over the world. The exciting discovery of termination-less polymerization processes and living polymers culminating in the development of narrow molecular weight polymers, star polymers, and tailor-made block and graft copolymers, contributed immensely to the rapid expansion of polymer scien

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Kinetics and Mechanisms in the Anionic Polymerization of Methacrylic Esters can occur. Homo- and copolymerization experiments show that the influence of the ester group is mainly given by electronic effects. In non- polar solvents the polymerization of ..-butyl methacrylate (in contrast to methyl methacrylate) leads to 100% isotactic polymers with rather low polydispersities.

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Anionic Polymerization of 4′-Vinylbenzocrown Ethersn the counter cations and the polymer-bound crown ether ligands. From the dissociation constants and the observed rate constants at different carbanion salt concentrations the ion pair and free ion propagation rate constants for styrene, p-methoxystyrene and 4 -vinylbenzo-15-crown-5 with potassium as counter ion were obtained in THF at -70°C.