Dispersion of layered double hydroxides in poly(ethylene terephthalate) by in situ polymerization and mechanical grinding

An organic–inorganic hybrid compound constituted by a layered double hydroxide (LDH) with the hydrotalcite-type structure intercalated with dodecyl sulfate (LDH-DS), was dispersed in poly(ethylene terephthalate), PET, through chemical reaction or by mechanical treatment in an agate mortar or a ball...

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Bibliographic Details
Published in:Applied clay science 2009-06, Vol.45 (1), p.44-49
Main Authors: Martínez-Gallegos, S., Herrero, M., Barriga, C., Labajos, F.M., Rives, V.
Format: Article
Language:English
Subjects:
Ball milling
Earth sciences
Earth, ocean, space
Exact sciences and technology
In situ polymerization
Layered double hydroxide
Mineralogy
Polymer-matrix composites
Silicates
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Summary:An organic–inorganic hybrid compound constituted by a layered double hydroxide (LDH) with the hydrotalcite-type structure intercalated with dodecyl sulfate (LDH-DS), was dispersed in poly(ethylene terephthalate), PET, through chemical reaction or by mechanical treatment in an agate mortar or a ball mill. Exfoliation and dispersion of the inorganic-organic hybrid in the polymer phase was achieved by chemical processes. Mechanical grinding of the LDH-DS and PET mixtures only led to partial dispersion after long milling times, both for the PET-LDH composites and for the LDH-DS hybrid. In situ preparation of the polymer by chemical reactions yielded optimum exfoliation at low LDH-DS loadings. As a result, mechanical processes are not recommended for preparation of these composites.
ISSN:0169-1317
1872-9053
DOI:10.1016/j.clay.2009.04.007