Macromolecules, Vol. 35, No. 13, 2002
Hyperbranched Poly(carbosiloxane)s 4945
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Use of an optically pure (S,S)-3 for the polymerization
allowed quantitative evaluation of hyperbranched struc-
ture of polymers by means of 29Si NMR analysis. The
values of DB (degree of branching) of the polymers (P 1-
P 5) are 0.27-0.43. End functionalization of the terminal
vinyl groups (Vi) was demonstrated by using either
hydrosilylation or hydroboration, affording optically
active hyperbranched poly(carbosiloxane)s having silyl
chloride groups (P 7: Si-Cl, degree of functionalization
) 72%) or hydroxy groups (P 9: degree of functional-
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Ack n ow led gm en t. This work was partly supported
by a grant in aid for Scientific Research (11450354) from
the Ministry of Education, Culture, Sports, Science and
Technology, J apanese government.
Su p p or tin g In for m a tion Ava ila ble: Characterization
data and experimental procedures for compounds P 2-P 6, P 9,
D-model, and L-model. This material is available free of charge
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