Abstract
A novel hexafunctional initiator C6[(CH2)2p-C6H4CH(Cl)Me]6 has been purposely synthesized to subsequently serve in the cationic polymerization of styrene. This initiator is prepared via Fe(ŋ-C5H5)+ mediated perbenzylation of hexamethylbenzene, followed by regiospecific acetylation, reduction and chlorination of outer phenyl rings. The polystyrene stars which are obtained in the presence of this initiator exhibit narrow molecular weight distribution (MWD) and a precise functionality of 6. Because the cationic polymerization of styrene is not totally free of side reactions, such as ß-proton elimination of growing carbeniums, the upper limit of the molecular weight control for these star polymers is the range of Mn ~30000 g/mole.
Address correspondence to Drs. Astruc and Gnanou
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Cloutet, E., Fillaut, JL., Astruc, D., Gnanou, Y. (1995). Hexaarmed Polystyrene Stars from a Newly Designed Initiator of Carbocationic Polymerization. In: Mishra, M.K., Nuyken, O., Kobayashi, S., Yağci, Y., Sar, B. (eds) Macromolecular Engineering. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-1905-8_5
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