A series of hyperbranched poly(arylene ether phosphine oxide)s (HB PAEPOs) were prepared via an A 2 ϩ B 3 polymerization scheme with tris(4-fluorophenyl)phosphine oxide as B 3 , and a variety of bisphenols as A 2 . The effects of the reactivity of the A 2 monomer, the A:B ratio, the addition mode, the solvent, and the concentration on the final molecular weight, polydispersity index (PDI), and degree of branching (DB) were studied. Soluble HB PAEPOs with weight-average molecular weights of up to 299,000 Da were achieved. Reactions in which the A 2 component was added slowly resulted in lower DBs (0.2-0.5), whereas the slow addition of the B 3 component provided samples with DBs of approximately 0.75. Reactions performed under highdilution conditions afforded completely soluble materials with weight-average molecular weights of 9000 -12,100 Da and PDI values as low as 2.20. The molecular weights achieved under high-dilution conditions were independent of the mode of monomer addition.
2 P=O. -A methodology is developed for the Suzuki coupling of compounds of type (I), (VI), and (VIII). The methodology allows the preparation of (IX) which may be used as a monomer precursor for dendritic and hyperbranched poly(arylene ether phosphine oxide). -(CZUPIK, M.; BANKEY, N.; FOSSUM*, E.; Synth. Commun. 34 (2004) 4, 705-714; Dep. Chem., Wright State Univ., Dayton, OH 45435, USA; Eng.) -M. Bohle 31-137
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