Alkyllithium-Initiated Polymerization of Myrcene New Block Copolymers of Styrene and Myrcene

摘要: Alkyllithium-initiated, anionic polymerization of vinyl monomers is a very useful synthetic method since the major variables affecting polymer properties can generally be controlled, i.e., molecular weight, weight distribution, copolymer composition, diene microstructure, architecture, and chain-end functionality.1–3 This control direct consequencce fact that in absence reactive impurities these polymerizations are termination chain transfer free; therefore, products chains with carbanionic ends (“living polymers”).4 An illustrative mechanistic description shown Scheme I for sec-butyllithium-initiated styrene.