In situ Structural Characterization of Semi-Crystalline Polymer Latex Particles by Small-Angle X-Ray Scattering

Bolze, Joerg; Ballauff, Matthias; Rische, Thorsten; Rudhardt, Daniel; Meixner, Jürgen

doi:10.1002/macp.200300117

Cited by 11 publications

(6 citation statements)

References 30 publications

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“…It is observed that the scattering intensity of MSPB increased greatly compared to the scattering curve of SPB due to the appearance of MNP with much higher electron density. There is an obvious shift of the maximum position of MSPB scattering curves toward the higher q region . From the fitting model several parameters were obtained.…”

Section: Resultsmentioning

confidence: 99%

“…Characterization of SPB by SAXS has been reported in several articles recently . Figure shows the fitting of SAXS curve of SPB without MNP obtained in SSRF, which will be used as a basic model and reference.…”

Section: Theorymentioning

confidence: 99%

“…SAXS can obtain the statistical average structural information of samples and determine the internal sealed microstructure of particles, which cannot be characterized well by other methods. Several publications have shown that SAXS is an effective method for observing the microstructure variation in nanoparticles and interaction between particles in different microenvironments . For the present system in this article, MNP were generated in SPB which consists of a solid polystyrene (PS) core and a shell of linear poly(acrylic acid) (PAA) chains densely grafted onto the core by one end.…”

Section: Introductionmentioning

confidence: 99%

“…The most commonly used radial distribution model of excess electron density of SPB was built in this article for SAXS analysis. Using the model the distribution of MNP and the basic structural information of SPB were obtained . TEM was used to intuitively confirm the generation and morphology of MNP in SPB.…”

Section: Introductionmentioning

confidence: 99%

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Distribution of magnetic nanoparticles in spherical polyelectrolyte brushes as observed by small‐angle X‐ray scattering

Han

et al. 2014

J Polym Sci B Polym Phys

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Magnetic nanoparticles (MNPs) with a size of about 2 nm are prepared in nanoreactors of spherical polyelectrolyte brushes (SPBs) consisting of a solid polystyrene (PS) core and a shell of linear poly(acrylic acid) (PAA) chains densely grafted onto the core by one end. The synthesized MNP are strongly adhered to PAA chains due to the intense interaction of chemical coordination with the carboxyl groups. The generation of MNP in SPB layer is legibly revealed by small-angle X-ray scattering (SAXS) due to the significant increase in electron density. The radial distribution of MNP in SPB is built by fitting SAXS data. Most of MNP are found to locate nearby the surface of PS core. Compared to dynamic light scattering and transmission electron microscopy, SAXS can observe the generation and distribution of MNP in SPB as well as the changes upon changing pH and salt concentration in real time.

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Section: Resultsmentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Distribution of magnetic nanoparticles in spherical polyelectrolyte brushes as observed by small‐angle X‐ray scattering

Han

et al. 2014

J Polym Sci B Polym Phys

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“…[6][7][8][9] The size of the particles and the contrast provided by the electron density difference between latex particles and dispersion medium make small-angle scattering techniques ideal for the structural analysis. [10][11][12][13][14] SANS was used to study the structural information and the film formation of latex dispersion, making use of enhanced contrast by adding D 2 O. [15][16][17][18][19] In the so-called contrast-variation method the electron density of the dispersion medium is systematically varied by adding suitable contrast agents (such as sucrose or glycerol) and SAXS data are recorded as a function of the adjusted contrast.…”

Section: Introductionmentioning

confidence: 99%

Radial structure of commercial styrene-co-butyl acrylate latex particles by means of synchrotron small-angle X-ray scattering under contrast-variation conditions

Chen

Zhang

et al. 2011

J Coat Technol Res

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The structural information of commercial styrene-co-butyl acrylate latex particles along radial direction was observed via the contrast-variation technique using synchrotron small-angle X-ray scattering (SAXS). By manipulating the electron density of the dispersion medium, the microstructural parameters of the latex dispersion were evaluated based on quantitative discussion of the scattering intensity distribution profiles. Four isoscattering points could be identified in the contrast-variation measurements, located at the scattering vectors corresponding to the position of the sharp minima of the scattering curve of homogenous spheres. This suggests that the shape and structure of particles were not affected by adding a certain amount of sucrose and salt. This phenomenon was attributed to the existence of the thin surface layers around particle core in the system. The data indicate that the latex particles exhibit a core-shell structure, and the average thickness of the shell is about 2 nm.

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Analysis of Polymer Colloids by Small‐Angle X‐Ray and Neutron Scattering: Contrast Variation

Ballauff¹

2011

Adv Eng Mater

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We review recent work done on polymer colloids by small‐angle X‐ray scattering (SAXS) and small‐angle neutron scattering (SANS). Special emphasis is laid on the variation of scattering contrast for both methods. The theory of contrast variation as applied to SAXS and SANS is presented. Different numerical approaches to the treatment of data are discussed. Applications of SAXS and SANS together with contrast variation to model systems are presented. This includes the analysis of an industrial system by using the example of semicrystalline colloid poly(urethane) particles. The examples given here demonstrate the power of contrast variation as applied to polymer colloids and in particular to latexes.

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In situ Structural Characterization of Semi-Crystalline Polymer Latex Particles by Small-Angle X-Ray Scattering

Cited by 11 publications

References 30 publications

Distribution of magnetic nanoparticles in spherical polyelectrolyte brushes as observed by small‐angle X‐ray scattering

Distribution of magnetic nanoparticles in spherical polyelectrolyte brushes as observed by small‐angle X‐ray scattering

Radial structure of commercial styrene-co-butyl acrylate latex particles by means of synchrotron small-angle X-ray scattering under contrast-variation conditions

Analysis of Polymer Colloids by Small‐Angle X‐Ray and Neutron Scattering: Contrast Variation

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