Grafts, hyperbranched

Fig. 14. Surface-grafted hyperbranched, branched, and linear polymers from ID to 3D...

The chain architecture and chemical structure could be modified by SCVCP leading to a facile, one-pot synthesis of surface-grafted branched polymers. The copolymerization gave an intermediate surface topography and film thickness between the polymer protrusions obtained from SCVP of an AB inimer and the polymer brushes obtained by ATRP of a conventional monomer. The difference in the Br content at the surface between hyperbranched, branched, and linear polymers was confirmed by XPS, suggesting the feasibility to control the surface chemical functionality. The principal result of the works is a demonstration of utility of the surface-initiated SCVP via ATRP to prepare surface-grafted hyperbranched and branched polymers with characteristic architecture and topography. 

Liang B, He ML, Xiao ZP et al (2008) Synthesis and characterization of folate-PEG-grafted-hyperbranched-PEI for tumor-targeted gene delivery. Biochem Biophys Res Commun 367 874-880... 

Scheme 5.14 Synthetic strategy for grafting hyperbranched glycopolymer from surfaces of MWCNTs by SCVCP of the inimer (AB ) and monomer (M) via ATRP. Reprinted with permission from Gao et al ...

Baek and co-workers grafted hyperbranched poly(ether ketone)s (HPEKs) on to MWCNTs through an in situ polycondensation of A3 (trimesic acid) and B2 (phenyl ether) monomers in the presence of poly(phosphoric acid) and P2O5. Due to the globular molecular architecture of HPs, the morphology of the nanocomposites resembled mushroom-like clusters on MWCNT stalks . The HPEK-g-MWCNT nanocomposites were soluble in polar aprotic... 

By process (4), although dendron with theoretical structure was not easily grafted, hyperbranched polymers having a large number of terminal functional groups can be grafted onto nanoparticle surfaces. 

Muthukrishnan S, Erhard DP, Mori H, Muller AHE (2006) Synthesis and characterization of surface-grafted hyperbranched glycomethacrylates. Macromolecules 39(8) 2743-2750... 

Linear, graft, hyperbranched, and star copolymeric siloxanes obtained via anionic ring-opening copolymerization of functional cyclotrisiloxanes were used as supports for transition metal catalysts. ... 

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