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  Morphology of heterogeneous latex particles investigated by atomic force microscopy

Gerharz, B., Momper, B., & Butt, H.-J. (1996). Morphology of heterogeneous latex particles investigated by atomic force microscopy. In C. Solans, M. Infante, & M. García-Celma (Eds.), Progress in Colloid & Polymer Science (pp. 91-95). Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1996. doi:10.1007/BFb0115759.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0007-5986-E Version Permalink: https://hdl.handle.net/21.11116/0000-0008-0685-B
Genre: Book Chapter

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 Creators:
Gerharz, Bettina1, Author
Momper, B.1, Author
Butt, Hans-Jürgen2, Author           
Affiliations:
1Abteilung F + E PM I, Hoechst AG, Frankfurt, Germany, ou_persistent22              
2Department of Biophysical Chemistry, Max Planck Institute of Biophysics, Max Planck Society, ou_2068289              

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Free keywords: Emulsion polymerization; heterogeneous latexes; morphology; AFM-MFFT
 Abstract: To investigate the morphology of individual latex particles with the atomic force microscope the particles were adsorbed onto mica and then dried. During adsorption and subsequent drying the packing of the particles is probably mainly determined by capillary forces, their deformation is caused by van der Waals forces. The shape of the particles on the mica surface depends on their original morphology and their viscoelastic properties. Chemically and also morphologically heterogeneous latex particles with therefore different viscoelastic properties were examined in comparison to the corresponding homogeneous latexes.

In addition, films formed with the latex particles were imaged to correlate the structure of individual particles with that of the film surface.

With the AFM it is possible to examine the morphology, size and viscoelastic inhomogenities of latex particles and thereby deduce their behavior during film formation. The particles examined here were on the monomer basis of n-butylacrylate and methylmethacrylate.

To compare the morphology of single particles with the surface structure of the corresponding films, we have chosen two different heterogeneous particles: For sample COM 1, we assumed a core-shell morphology, for sample COM 2 a hemispherical particle form. The morphology assumptions were based on studies which compare the minimum film formation temperatures with the glass transition temperatures of the different particle phases and their mass fractions. The results observed by the heterogeneous particles were compared to the corresponding homogeneous ones. Both composite particles exhibit the speculated morphology and, consequently, the expected properties after film formation.

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Language(s): eng - English
 Dates: 2007-12-031996
 Publication Status: Issued
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1007/BFb0115759
 Degree: -

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Title: Progress in Colloid & Polymer Science
  Other : Trends in Colloid and Interface Science X
  Subtitle : Space Solar Physics
Source Genre: Series
 Creator(s):
Solans , C., Editor
Infante , M.R., Editor
García-Celma , M.J., Editor
Affiliations:
-
Publ. Info: Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1996
Pages: 367 Volume / Issue: 100 Sequence Number: - Start / End Page: 91 - 95 Identifier: ISBN: 978-3-7985-1056-2
ISBN: 978-3-7985-1665-6
DOI: 10.1007/BFb0115740