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In situ Structural Characterization of Semi‐Crystalline Polymer Latex Particles by Small‐Angle X‐Ray Scattering
Author(s) -
Bolze Joerg,
Ballauff Matthias,
Rische Thorsten,
Rudhardt Daniel,
Meixner Jürgen
Publication year - 2004
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200300117
Subject(s) - small angle x ray scattering , lamellar structure , scattering , transmission electron microscopy , materials science , particle (ecology) , crystallography , polymer , core (optical fiber) , characterization (materials science) , polymer chemistry , chemistry , optics , composite material , nanotechnology , physics , oceanography , geology
Summary: The inner structure of polyurethane latex particles has been studied in situ using small‐angle X‐ray scattering (SAXS). From contrast variation SAXS measurements evidence could be given that the dispersed particles are semi‐crystalline. The semi‐crystalline structure gives a strong contribution to the measured intensities in an intermediate range of scattering vectors. This contribution, which is independent of the adjusted contrast, could be separated and the long period of the lamellar structure could thus be determined quantitatively to 11 nm. In addition, it was found that the particles exhibit a core‐shell structure which arises from electron‐rich acid groups that are preferentially located at the particle surface.Transmission electron microscopy (TEM) picture of the PUR particles.