Bottle brush architecture

Rathgeber, S., T. Pakula, A. Wilk, K. Matyjaszewski, and K.L. Beers. 2005. On the shape of bottle-brush macromolecules Systematic variation of architectural parameters. J Chem Phys 122 124904. 

Star-type and Bottle-Brush-type Architectures... 

For the adsorption of macromolecules with complex architecture, such as bottle brush polymers, it is an intriguing question how the above picture of polymer adsorption changes after all, most manipulations of macromolecules with external devices (e.g., AFM tips) presuppose that the macromolecule is situated at a suitable surface [156], rather than freely diffusing in the 3D space of a more or less dilute polymer solution. 

Schlaad et al. reported in greater detail on the solid-state phase behavior of linear and bottle-brush shaped polystyrene-block-poly(Z-L-lysine) in a wide range of molecular weight, composition, and architectures [76]. According to earlier reports on rod-coil block copolymers with polypeptides, mainly (undulated) lamellar morphologies were observed (see Figure 21). 

Fig. 2. Selected architectures of block copolymers (a) diblock (b) triblock (c) comb copolymer consisting of flexible chains (d) rod-coil diblock copolymer consisting of a rodlike block and a coil-like block (e) hairyrods, i.e., comb-block copolymers consisting of rodlike backbone and coil-like side chains and (f) LC coil with a side-chain liquid crystalline (LC) block and a flexible block. Many other variations have been introduced, such as multiblock copolymers, block copolymers consisting of several rodlike blocks, or star-shaped block copolymers. Comb-coil block copolymers with dense packing of side chains are also denoted as molecular bottle brushes, as is illustrated in (g) by a simulated structure of an isolated molecule dissolved in a solvent. (Courtesy of Mika Saariaho.)...

Subsequently, Wolf and coworkers [49] investigated the effect of copolymer architecture on the interfacial tension reduction for the PDMS/PEO blend utilizing PDMS-h-PEO diblocks, PDMS-b-PEO-b-PDMS triblocks, and bottle-brush copolymers consisting of PDMS backbone and PEO brushes. The study showed that for the range of molecular weights investigated, the total number of PDMS... 

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