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On the shape of bottle-brush macromolecules: Systematic variation of architectural parameters
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10.1063/1.1860531
/content/aip/journal/jcp/122/12/10.1063/1.1860531
http://aip.metastore.ingenta.com/content/aip/journal/jcp/122/12/10.1063/1.1860531

Figures

Image of FIG. 1.
FIG. 1.

Sketch of a bottle-brush polymer (top) and of a wormlike cylinder with radial density profile (center). In the bottom the starlike density profile of sample B1 and the Gaussian density profiles of sample B2–B5 are shown in terms of polymer volume fractions as a function of the radial distance from the contour line normalized to the radius of gyration of each sample.

Image of FIG. 2.
FIG. 2.

Blob model for bottle-brush polymers sketched after Birshtein et al. (Ref. 39) and Halperin (Ref. 40).

Image of FIG. 3.
FIG. 3.

Structure of the bottle-brush polymers with a PAMA backbone and PnBA side chains.

Image of FIG. 4.
FIG. 4.

Form factor of the bottle-brush polymer B5 as obtained with SLS and SANS (markers) in a double logarithmic presentation. Absolute intensity normalized to polymer concentration in vol % is plotted vs scattering vector. The solid and dashed lines show the theoretical results obtained for a flexible and stiff cylinder with Gaussian density profile, respectively. The slopes and as expected for the intermediate- regime for a stiff cylinder and 3D-SAW under good solvent conditions are also shown.

Image of FIG. 5.
FIG. 5.

Cross section form factor for the sample B5 obtained from the experimental data by plotting (normalized to ) vs the scattering vector in a double logarithmic presentation. The solid line shows the theoretical result obtained for a flexible cylinder with Gaussian density profile.

Image of FIG. 6.
FIG. 6.

Form factor of the bottle-brush polymers (B4, B2, B5) with same side chain length but different backbone length measured by SLS and SANS (markers) in a double logarithmic presentation. The solid lines correspond to results of a (simultaneous) fit as described in the text.

Image of FIG. 7.
FIG. 7.

Form factor of the bottle-brush polymers (B1, B2, B3) with same backbone length but different side chain length [including the bare backbone (M2)] measured by SLS and SANS (markers) in a double logarithmic presentation. The solid lines correspond to results of a (simultaneous) fit as described in the text.

Tables

Generic image for table
Table I.

Summary of the results for good solvent conditions of the models of Birshtein et al. (Ref 39) and Halperin (Ref. 40).

Generic image for table
Table II.

Characteristics of the studied macroinitiators and bottle-brush macromolecules.

Generic image for table
Table III.

Summary of structural parameters and results obtained from the model fit described in the text.

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/content/aip/journal/jcp/122/12/10.1063/1.1860531
2005-03-25
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: On the shape of bottle-brush macromolecules: Systematic variation of architectural parameters
http://aip.metastore.ingenta.com/content/aip/journal/jcp/122/12/10.1063/1.1860531
10.1063/1.1860531
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