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Novel Approach of Evaluating Polymer Nanocomposite Structure by Measurements of the Freezing-Point Depression

✍ Scribed by Miguel A. López-Manchado; Juan L. Valentín; Berta Herrero; Miguel Arroyo

Publisher: John Wiley and Sons
Year: 2004
Tongue: English
Weight: 161 KB
Volume: 25
Category: Article
ISSN: 1022-1336
DOI: 10.1002/marc.200400148

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✦ Synopsis

Abstract

Summary: A novel experimental approach based on the freezing‐point depression of a solvent in a swollen gel has been developed to characterize the structure of nanocomposites. A higher depression in the freezing point has been related with an exfoliated nanocomposite. This increased depression not only depends on the formation of a tighter network but also on the decrease of the size of the solvent cages where the nucleation takes place.

The nucleation process of unfilled and organoclay‐filled natural rubber with the same crosslinking density.

magnified imageThe nucleation process of unfilled and organoclay‐filled natural rubber with the same crosslinking density.

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The introdurtion of intramolecular amide bonds iiito synthetic polypeptides produces molecules with organized spatial structure which are good models for the tertiary structure of proteins. Polarization of fluorescence measurements were used to study the internal structure and the overall rigidity o