Confinement Effects on the Structure and Dynamics in Intercalated Polymer / Layered Silicates Nanohybrids

Journal Article · Wed Jun 02 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3455671· OSTI ID:21407858

Chrissopoulou, K; Afratis, A ^[1]; Fotiadou, S ^[1]; Frick, B ^[2]; Anastasiadis, S H ^[1]

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1. Foundation for Research and Technology-Hellas, Instutute of Electronic Structure and Laser, P.O. Box 1527, 711 10, Heraklion, Crete (Greece)
2. ILL-Institut Laue-Langevin, F-38042 Grenoble Cedex (France)

The structure and dynamics of PEO/Na{sup +} MMT nanocomposites are investigated by XRD, DSC, and quasielastic neutron scattering (QENS). For concentrations up to 20 wt% the PEO chains within the galleries form either a single- or a double-layered structure of intercalated chains; at higher PEO content only double layers of intercalated PEO chains are formed within the 0.9 nm galleries. Moreover, it is only for polymer content above 70 wt% that peaks corresponding to crystalline PEO and DSC melting transition are observed, indicating that the confined chains remain liquid-like and only the excess polymer outside the completely full galleries can crystallize. QENS investigated the dynamics of PEO in bulk and in confinement. A jump of the bulk PEO dynamics at T{sub m} is observed whereas the dynamics of confined PEO shows only weak wavevector and temperature dependence and goes smoothly through the bulk T{sub m}.

• OSTI ID: 21407858
• Journal Information: AIP Conference Proceedings, Vol. 1255, Issue 1; Conference: 5. international conference on times of polymers (TOP) and composites, Ischia (Italy), 20-23 Jun 2010; Other Information: DOI: 10.1063/1.3455671; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
77 NANOSCIENCE AND NANOTECHNOLOGY
CALORIMETRY
COMPOSITE MATERIALS
CRYSTALLIZATION
DEUTERONS
LAYERS
LIQUIDS
MELTING
NANOSTRUCTURES
NEUTRON REACTIONS
NEUTRONS
POLYMERS
QUASI-ELASTIC SCATTERING
SILICATES
SODIUM IONS
TEMPERATURE DEPENDENCE
X-RAY DIFFRACTION
BARYON REACTIONS
BARYONS
CHARGED PARTICLES
COHERENT SCATTERING
DIFFRACTION
DIRECT REACTIONS
ELEMENTARY PARTICLES
FERMIONS
FLUIDS
HADRON REACTIONS
HADRONS
IONS
MATERIALS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
QUASI-FREE REACTIONS
SCATTERING
SILICON COMPOUNDS