STAR POLYMERS AND NANOSPHERES FROM CROSS-LINKABLE DIBLOCK COPOLYMERS

Polystrene-block-poly(2-cinnamoylethyl methacrylate) (PS-b-PCEMA) form ed micelles in THF/cyclohexane or chloroform/cyclohexane mixtures with the PCEMA block as the core. Depending on the relative length of the PS and PCEMA block, star and crewcut micelles were prepared. Upon UV i rradiation, the PCEMA block selectively cross-linked to form star poly mers and nanospheres from the corresponding star and crewcut micelles. The cross-linked micelles were characterized by solution and solid-st ate NMR, FTIR, GPC, TEM, and dynamic and static light scattering.