Polymer/clay nanocomposites through multiple hydrogen-bonding interactions

Date
2015
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Source Title
Journal of Polymer Science, Part A: Polymer Chemistry
Print ISSN
0887-624X
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Publisher
John Wiley and Sons Inc.
Volume
53
Issue
5
Pages
650 - 658
Language
English
Type
Article
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Abstract

An 2-ureido-4[1H]pyrimidinone (UPy) motif with self-association capability (through quadruple hydrogen bonds) was successfully anchored onto montmorillonite clay layers. Polymer/clay nanocomposites were prepared by specific hydrogen bonding interactions between surface functionalized silica nanoclays and UPy-bonded supramolecular poly(ethylene glycol) or poly(É-caprolactone). The mixed morphologies including intercalated layers with a non-uniform separation and exfoliated single layers isolated from any stack were determined by combined X-ray diffraction and transmission electron microscopic measurements. Thermal analyses showed that all nanocomposites had higher decomposition temperatures and thermal stabilities compared with neat polymer. The differential scanning calorimetric data implied that the crystallinity of polymers did not show essential changes upon introduction of organomodified UPy clays.

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Keywords
Hydrogen bonding, Nanocomposites, Organoclay, Ring-opening polymerization, Self-assembly, Association reactions, Calorimetry, Nanocomposites, Organoclay, Polyethylene glycols, Polymers, Ring opening polymerization, Self assembly, Thermoanalysis, X ray diffraction, Combined X ray diffraction, Decomposition temperature, Differential scanning calorimetric, Microscopic measurement, Multiple hydrogen bonding, Polymer/clay nanocomposites, Quadruple hydrogen bonds, Specific hydrogen bondings, Hydrogen bonds
Citation
Published Version (Please cite this version)