Summary
Triblock copolymers containing polystyrene (PSt) and poly(4-acetoxystyrene) (PAcOSt) segments have been prepared by atom transfer radical polymerization (ATRP). In the first step one of the two monomers was polymerized in bulk using the initiating system α,α′-dibromo-p-xylene/CuBr/2,2′-bipyridine (1/1/3). Subsequently the resulting telechelic polymers with active bromo end group structures were used as macroinitiators for the polymerization of the second monomer under ATRP conditions. This process gave PAcOSt-PSt-PAcOSt and PSt-PAcOSt-PSt triblock copolymers with predetermined molecular weights and narrow molecular weight distributions. Polymerization of a mixture of equal molar amounts of the two monomers yielded a random copolymer with narrow molecular weight distribution.
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Gao, B., Chen, X., Iván, B. et al. Synthesis of triblock and random copolymers of 4-acetoxystyrene and styrene by living atom transfer radical polymerization. Polymer Bulletin 39, 559–565 (1997). https://doi.org/10.1007/s002890050186
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DOI: https://doi.org/10.1007/s002890050186