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Study of interlayer spacing collapse during polymer/clay nanocomposite melt intercalation.
J Nanosci Nanotechnol. 2008 Apr; 8(4):1707-13.JN

Abstract

The influence of the chemical structure of alkylammonium organo-modifying montmorillonite clays on the ability to form nanocomposites by melt blending, depending on the processing temperature and the organoclay thermal treatment, has been investigated. On one side chlorinated polyethylene/Cloisite 30B (nano)composite has been prepared by melt intercalation at 175 degrees C and its wide angle X-ray diffraction pattern revealed that the peak characteristic of the interlayer spacing of the organoclay was shifted to lower d-spacing, indicating a collapse of the organoclay structure. On the other side, (nano)composites based on ethylene-vinyl acetate copolymer/Cloisite 30B have been prepared by melt intercalation at 140 degrees C. At this temperature, exfoliation was observed with the as-received organoclay while the same organo-modified clay, simply dried at 180 degrees C for 2 hours, induced again the formation of a composite with a collapsed structure. The effect of the Cloisite 30B thermal treatment on the morphology and mechanical properties of ethylene-vinyl acetate-based (nano)composites was investigated using wide angle X-ray diffraction and tensile tests. In order to shed some light on the origin of this clay interlayer collapse, organoclay modified with various ammonium cations bearing long alkyl chains with different amounts of unsaturations were studied using wide angle X-ray diffraction and X-ray photoelectron spectroscopy before and after thermal treatment at 180 degrees C for 2 hours. Isothermal thermogravimetric analysis of all organoclays was also investigated. The layers collapse effect is discussed depending upon the level of unsatured hydrocarbon present in the organic surfactant.

Authors+Show Affiliations

Benali S
Center of Innovation and Research in Materials and Polymers CIRMAP, Laboratory of Polymeric and Composite Materials, University of Mons-Hainaut, Académie Universitaire Wallonie-Bruxelles, Place du Parc 20, B-7000 Mons, Belgium.
Peeterbroeck S
No affiliation info available
Larrieu J
No affiliation info available
Laffineur F
No affiliation info available
Pireaux JJ
No affiliation info available
Alexandre M
No affiliation info available
Dubois P
No affiliation info available

MeSH

Aluminum SilicatesClayCrystallizationMacromolecular SubstancesMaterials TestingMolecular ConformationNanostructuresNanotechnologyParticle SizePolyethylenePolymersSurface PropertiesTransition Temperature

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18572568

Citation

Benali, Samira, et al. "Study of Interlayer Spacing Collapse During Polymer/clay Nanocomposite Melt Intercalation." Journal of Nanoscience and Nanotechnology, vol. 8, no. 4, 2008, pp. 1707-13.
Benali S, Peeterbroeck S, Larrieu J, et al. Study of interlayer spacing collapse during polymer/clay nanocomposite melt intercalation. J Nanosci Nanotechnol. 2008;8(4):1707-13.
Benali, S., Peeterbroeck, S., Larrieu, J., Laffineur, F., Pireaux, J. J., Alexandre, M., & Dubois, P. (2008). Study of interlayer spacing collapse during polymer/clay nanocomposite melt intercalation. Journal of Nanoscience and Nanotechnology, 8(4), 1707-13.
Benali S, et al. Study of Interlayer Spacing Collapse During Polymer/clay Nanocomposite Melt Intercalation. J Nanosci Nanotechnol. 2008;8(4):1707-13. PubMed PMID: 18572568.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Study of interlayer spacing collapse during polymer/clay nanocomposite melt intercalation. AU - Benali,Samira, AU - Peeterbroeck,Sophie, AU - Larrieu,Jeŕôme, AU - Laffineur,Fabrice, AU - Pireaux,Jean-Jacques, AU - Alexandre,Michaël, AU - Dubois,Philippe, PY - 2008/6/25/pubmed PY - 2008/7/23/medline PY - 2008/6/25/entrez SP - 1707 EP - 13 JF - Journal of nanoscience and nanotechnology JO - J Nanosci Nanotechnol VL - 8 IS - 4 N2 - The influence of the chemical structure of alkylammonium organo-modifying montmorillonite clays on the ability to form nanocomposites by melt blending, depending on the processing temperature and the organoclay thermal treatment, has been investigated. On one side chlorinated polyethylene/Cloisite 30B (nano)composite has been prepared by melt intercalation at 175 degrees C and its wide angle X-ray diffraction pattern revealed that the peak characteristic of the interlayer spacing of the organoclay was shifted to lower d-spacing, indicating a collapse of the organoclay structure. On the other side, (nano)composites based on ethylene-vinyl acetate copolymer/Cloisite 30B have been prepared by melt intercalation at 140 degrees C. At this temperature, exfoliation was observed with the as-received organoclay while the same organo-modified clay, simply dried at 180 degrees C for 2 hours, induced again the formation of a composite with a collapsed structure. The effect of the Cloisite 30B thermal treatment on the morphology and mechanical properties of ethylene-vinyl acetate-based (nano)composites was investigated using wide angle X-ray diffraction and tensile tests. In order to shed some light on the origin of this clay interlayer collapse, organoclay modified with various ammonium cations bearing long alkyl chains with different amounts of unsaturations were studied using wide angle X-ray diffraction and X-ray photoelectron spectroscopy before and after thermal treatment at 180 degrees C for 2 hours. Isothermal thermogravimetric analysis of all organoclays was also investigated. The layers collapse effect is discussed depending upon the level of unsatured hydrocarbon present in the organic surfactant. SN - 1533-4880 UR - https://www.unboundmedicine.com/medline/citation/18572568/Study_of_interlayer_spacing_collapse_during_polymer/clay_nanocomposite_melt_intercalation_ L2 - https://www.lens.org/lens/search/patent/list?q=citation_id:18572568 DB - PRIME DP - Unbound Medicine ER -