A divergent synthetic scheme was developed for the preparation of high branching functionality hybrid polymers from carbosilane dendrimer substrates and polybutadiene side chains. Carbosilane dendrimers with 32, 64, or 128 peripheral Si− Cl functional groups were first coupled with 1, 2-polybutadienyllithium chains having a number-average molecular weight M n≈ 1000. The polybutadiene-grafted substrates were then hydrosilylated with ...