Etude d'un procédé d'élaboration et caractérisation de nanocomposites à base de poly(éthylène térephtalate) et de montmorillonite :

Abstract : This work dealt with poly(ethylene terephthalate)/organically modified montmorillonite (PET/o-MMT) nanocomposites. The main objective was to study the efficiency of using a polyester ionomer as a compatibilizer to promote the intercalation and/or exfoliation of the o-MMT in the PET, on the one hand; and the structures and properties of the resulting composites, on the other hand. The o-MMT content was 0, 1, 3 or 5 wt.% and the compatibilizer/o-MMT mass ratio was 0:1, 1:1 or 3:1. The o-MMT was further intercalated and/or exfoliated in the presence of the compatibilizer, as revealed by WAXS and TEM. The PET/o-MMT composites exhibited a solid-like behavior (G' and G'' versus w at low frequencies) indicating a percolated structure. Compared to the pristine PET, they showed similar thermal stability, higher elastic modulus, and higher complex viscosity presenting yield strength in the molten state. They also showed much lower CO2 permeability, although the solubility of the latter remained almost unchanged. The presence of the compatibilizer further decreased the CO2 permeability, by 50% in the best cases. Water vapor permeability was also decreased. The highest decrease was about 30% and was obtained with an intermediate compatibilizer/o-MMT mass ratio of 1:1. A further increase in that ratio resulted in an increase in water vapor permeability, due probably to the fact that water was soluble in the compatibilizer
Document type :
Theses
Complete list of metadatas

https://hal.univ-lorraine.fr/tel-01752528
Contributor : Thèses Ul <>
Submitted on : Thursday, March 29, 2018 - 1:50:22 PM
Last modification on : Thursday, January 31, 2019 - 1:27:51 AM

File

2005_VIDOTTI_S_E.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : tel-01752528, version 1

Collections

Citation

Suel Eric Vidotti. Etude d'un procédé d'élaboration et caractérisation de nanocomposites à base de poly(éthylène térephtalate) et de montmorillonite :. Autre. Institut National Polytechnique de Lorraine, 2005. Français. ⟨NNT : 2005INPL094N⟩. ⟨tel-01752528⟩

Share

Metrics

Record views

16

Files downloads

12