Evidences of macromolecular chains confinement of ethylene-propylene copolymer in organophilic montmorillonite nanocomposites

被引：0
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作者：
Passaglia, Elisa [1 ]
Bertoldo, Monica [2 ]
Ciardelli, Francesco [2 ,3 ]
Prevosto, Daniele [4 ]
Lucchesi, Mauro [4 ]
机构：
[1] CNR-ICCOM Pisa Section Department of Chemistry and Industrial Chemistry, University of Pisa, Via Risorgimento 35, Pisa, Italy
[2] CNR-INFM PolyLab Department of Chemistry and Industrial Chemistry, University of Pisa, Via Risorgimento 35, Pisa, Italy
[3] Department of Chemistry and Industrial Chemistry, University of Pisa, Via Risorgimento 35, Pisa, Italy
[4] CNR-INFM PolyLab, Department of Physics, University of Pisa, Largo Pontecorvo 2, Pisa, Italy
来源：
European Polymer Journal | 2008年 / 44卷 / 05期
关键词：
A random ethylene-propylene copolymer (EPM) functionalized with grafted diethylsuccinate groups was melt blended with increasing amount (to 20 wt%) of organophilic montmorillonite (OMMT) to prepare nanocomposites with different morphologies as evidenced by XRD and TEM analysis. All the nanocomposites were treated with boiling toluene that did not extract a significant amount of EPM. The increase of not-extracted EPM with the increasing quantity of OMMT suggested strong interactions of the polymer chains with the inorganic substrate. The DSC measurements of nanocomposites and the corresponding insoluble residues revealed a higher Tg values with larger amount of inorganic particles. The dielectric relaxation analysis confirmed the evidence of strong interactions among montmorillonite and the polar diethylsuccinate groups for the macromolecules trapped due to the presence of the inorganic layers. The results were discussed with reference to their relevance as an evidence of nanoconfinement at polymer clay interface and correlated with the clay basal distance variation due to the intercalation process. © 2008 Elsevier Ltd. All rights reserved;
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页码：1296 / 1308
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