Summary
Polystyrene macromonomers with terminal 1,1-diphenylethylene functionality were prepared by the reaction of one equivalent of poly(styryl)lithium with 1,4-bis (l-phenylethenyl)benzene (PDDPE). The macromonomer functionalities were determined by 1H NMR [σ(vinyl CH2)=5.4 ppm] and UV spectroscopy (λmax=260 nm). The stoichiometric linking reaction of poly(styryl)lithium (Mn=15.3x103 g/mol) with an ω-1,1-diphenylethylene-terminated polystyrene macromonomer (Mn=5.4x103 g/mol) followed by addition of styrene monomer has been used to prepare a hetero three-armed, star-branched polymer with Mn=5.8x104 g/mol (5,400-15,300-37,300). The g′ value ([ν]b/[ν]l) was equal to 0.92.
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Quirk, R.P., Yoo, T. Anionic synthesis of ω-1,1-diphenylethylene-terminated polystyrene macromonomers. Rational synthesis of ABC hetero three-armed-star-branched polymers. Polymer Bulletin 31, 29–36 (1993). https://doi.org/10.1007/BF00298760
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DOI: https://doi.org/10.1007/BF00298760