ABA triblock copolymers containing polyisoprene segments
such as polyisoprene-b-polystyrene-b-polyisoprene (PIP-b-PSt-b-PIP) and polyisoprene-b-poly(methyl methacrylate)-b-polyisoprene (PIP-b-PMMA-b-PIP)
were prepared with macro-iniferter technique.The mcro-iniferter (PSt-CCDCM and PMMA-CCDCM)bearing α-and ω-N
N-diethyldithiocarbamyl (DC) groups were synthesized by bulk polymerization of St and MMA with diethyl 2
3-dicyano-2
3-di(p-N
N-diethyldithiocarbamylmethyl)-phenylsuccinate (DDDCS) as a thermal iniferter.The block copolymerization of IP with PSt-CCDCM or PMMA-CCDCM was carried out under UV light irradiation.The block copolymers were characterized by 1H-NMR
GPC and DSC analyses
and the polymerization proceeded as a living polymerization process.