Comb-burst

Table 9.1 Characterization data for polyethylenimine comb-burst polymers (adapted from ref. 8)...

Related Hyperbranched Systems — Comb-burst Dendrimers. 298... 

The first demonstration of this GDS method employed polyoxazoline methodology to produce Comb-burst poly(ethyleneimine) — poly(2-ethyl-2-oxazo-line copolymers and poly(ethyleneimine) homopolymers. 

Fig. 49. Empirical structure for a Comb-burst dendrimer series (Generation = 0 — i), wherein the key architectural components (a) initiator core chain, (b) interior and (c) terminal chains are designated...

More recent work has shown that this GDS strategy may be used to produce all hydrocarbon, poly (styrene) type dendrimers that the authors refer to as being derived from arborescent grafting [181]. Hybridization of Starburst/Cascade architecture with Comb-burst dendrimer structure, has been reported by our group very recently [182], thus clearly establishing the vast breadth and scope of GDS techniques for the construction and design of nanoscopically sized macromolecules (i.e., 1-100 nm in diameter). 

Tomalia, D. A., et al. (1991), Comb-burst dendrimer topology. New macromolecular architecture derived from dendritic grafting, Macromolecules, 24,1435-1438. 

The idea to string dendron pieces of cake to a polymer chain as a core, was mentioned by Tomalia and Kirchhoff [16a] in a patent as early as 1987 ( comb-burst polymers). In a recent paper, the results of this work based on strategy (i) have been published in more detail. A poly-... 

The number of RU (Aru) and the molecular weight (M) of Comb-burst polymers can be predicted from the number... 

A series of Comb-burst polyethylenimine was thus synthesized with a side-chain DP increasing from 10 to 20 for the first two generations, and then maintained constant at 100 for the subsequent generations [106], A geometric increase in molecular weight was observed as predicted by Equation 30.12, with grafting yield variations similar to those observed for arborescent systems. 

Comb burst dendrimer Backbone styrene/divinylbenzene copolymer teeth triethanolamine ion exchange material (anionic core and branch points, cationic termini). [247]... 

A new comb-burst dendrimer was synthesized via termination reaction of the living PEtOZO polymerization ends with LPEI, followed by the add hydrolysis to remove the propionyl group. These reactions were repeated to give dendritic poly-ethylenimine (PEl)." ... 

A different approach complementing the scope of accessible MWs for branched polyglyddol stmctures has been developed by Dworak et al. It is based on the repeated polymerization and deprotection of a protected glyddol monomer yielding three generations of comb-burst polyglyddols with MWs of 82 000, 740 000, and 1 800 000, respectively. 

IV. COMB-BURST DENDRIMER OR ARBORESCENT GRAFT POLYMERS... 

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