A Facile Strategy for Preparation of a-Heterobifunctional Polystyrenes with Well-Defined Molecular Weight

摘要

A facile strategy for synthesis of a-heterobifunctional polystyrenes is reported. The novel functional polystyrenes have been successfully synthesized via a combination of atom transfer radical polymerization (ATRP) and chemical modification of end-functional groups. First, e-caprolactone end-capped polystyrenes with controlled molecular weight and low polydispersity were prepared by ATRP of styrene using a-bromo-e-caprolactone (aBrCL) as an initiator. Then, removal of the terminal bromine atom was performed with iso-propylbenzene in the presence of CuBr/PMDETA. Finally, ring-opening modifications of the caprolactone group were carried out with amines, nbutanol and H2O to produce novel polystyrenes containing two different functional groups at one end.