Star polymers silicon-based

Tonic Dendrimers and Related Materials [R. Engel, Chapt. 3, pp. 73-99]. Silicon-based Stars, Dendrimers, and Hyperbranched Polymers [L. J. Mathias, T. W. Carothers, Chapt. 4, pp. 101-121]. 

The linear polymers, as shown above, can be built up by the sequential addition of monomer or by coupling the living anionic chains using compounds like dichloro dimethylsilane. Hence, the base polymer would have styrene polymerized first, followed by butadiene, and then addition of the coupling agent. If a multifunctional coupling agent such as silicon tetrachloride is used, a radial block or star-branched SBS is formed. 

SILICON-BASED STARS, DENDRIMERS, AND HYPERBRANCHED POLYMERS... 

Mathias, L. J. Carothers, T. W. Silicon-Based Stars, Dendrimers, and Hyperbranched Polymers Newkome G., Ed. JAI Press Hampton Hill, Middlesex, 1995 Vol. 2, p. 101. 

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