Dendrimer-like star-branched block copolymer

Scheme 5.2 Synthesis of 2G dendrimer-like star-branched block copolymer composed of PEO and PS segments reported by Gnanou et al.

Scheme 5.12 Synthesis of 4G dendrimer-like star-branched block copolymers having functionalized segment at the fourth generation.

Figure 5.1 3G and 5G dendrimer-like star-branched polymers and block copolymer. 

The results of the 2G and 3G dendrimer-like star-branched polymers and block copolymers, after fractional precipitation, are summarized in Table 5.2. The resulting polymer all possessed the observed Mn values in good agreement with those calculated, and narrow molecular-weight distributions (M /Mn 1.1). Since the off-center living polymers and the 2G living dendrons used as subunits are sampled during the synthesis and well characterized prior to the synthesis and then reacted with a multifunctional core to synthesize the 2G and 3G polymers, this procedure corresponds to an example of an arm-first process. 

Table 5.4 Synthesis of dendrimer-like star-branched (PS)s and block copolymers composed of PS and PMMA segments by the arm-first divergent iterative methodology ...

Hirao, A., Watanabe, T., Ishizu, K. et al. (2009b) Precise synthesis and characterization of fourth-generation dendrimer-like star-branched poly(methyl methacrylate)s and block copolymers by iterative methodology based on living anionic polymerization. Macromolecules, 42,682-693. 

Yoo, H.-S., Watanabe, T., and Hirao, A. (2009) Precise synthesis of dendrimer-like star-branched polystyrenes and block copolymers composed of polystyrene and poly(methyl methacrylate) segments by an iterative methodology using hving anionic polymerization. Macromolecules, 42,4558 570. 

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