PS-fc-poly

PS-fc-poly(4-f-butylstyrene)]n, (PS-fi-PfBuS) star-block copolymers were prepared by anionic polymerization and sequential addition of monomers with DVB as the linking agent for the formation of the star structure [156]. The functionality of the stars ranged between 10 and 20. Selective sulfonation of PS blocks was subsequently performed using the sulphur trioxide and triethyl phosphate complex in 1,2-dichloroethane, followed by neutralization with sodium methoxide. For this reason DVB was used for the linking reaction instead of chlorosilanes, where a better control could be achieved. DVB stars are more robust and the sulfonation reaction proceeds without cleavage of the arms from the star structure. 

Upon supramolecular self-assembly, low molecular-weight additives can be used to adjust the properties of BC bulk films by hydrogen bonds. Ikkala and coworkers first introduced this concept in PS-fc-poly(4-vinylpyridine) (P4VP) stoichiometrically complexed with pentadecylphenol molecules to form the supramolecules by hydrogen bonding (Makinen et al., 2000). The advantages of this method are as follows ... 

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