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.
Blob model for bottle-brush polymers sketched after Birshtein et al. (Ref. 39) and Halperin (Ref. 40).
Structure of the bottle-brush polymers with a PAMA backbone and PnBA side chains.
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.
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.
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.
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.
Summary of the results for good solvent conditions of the models of Birshtein et al. (Ref 39) and Halperin (Ref. 40).
Characteristics of the studied macroinitiators and bottle-brush macromolecules.
Summary of structural parameters and results obtained from the model fit described in the text.
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