Controlled Synthesis of Various Poly(Alkyl Methacrylates) by Anionic Techniques.

摘要

Homopolymer synthesis investigations have further defined the requirements for the controlled anionic synthesis of various poly(alkyl methacrylates). Small variations in polymerization conditions have a profound influence on the nature of the propagating lithium enolate. However, the effects depend largely upon the size of the ester alkyl group involved. The delicate relationship among such variables as ester alkyl group size, polymerization temperature and polymerization solvent have been explored and will be discussed. Drastically different enolate stabilities have been observed for the bulkier branched alkyl methacrylates compared to those based upon linear ester alkyl groups. This has primarily attributed to the significantly modified steric and electronic environment of the ester carbonyl. (jes)