Depth Profile of Chemical Composition and Free Volume of Polyurethane-Urea/Clay Nanocomposite

Sangram K. Rath; Manoranjan Patri; Priya Maheshwari; Kathi Sudarshan; Pradeep K. Pujari; Devang V. Khakhar

doi:10.4028/www.scientific.net/MSF.733.175

Paper Titles

Effect of Hydrophilicity of the Sidechains on the Amorphous Structure of Polypropylene Derivatives Studied by Positronium Lifetime Measurements
p.159

Positron Lifetimes and Crystallinity of γ-Irradiated Polypropylenes
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Positronium Lifetime Study on Subnanoscopic Structure of Polyrotaxane
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New Organic-Inorganic Hybrid Ureasil-Based Polymer Materials Studied by PALS and SEM Techniques
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Depth Profile of Chemical Composition and Free Volume of Polyurethane-Urea/Clay Nanocomposite
p.175

Relationships between Positron Lifetime and Dynamics of Polymers
p.179

On the Relationship of the Relative Intensity I₃ and a Cavity Number as Obtained from Computer Simulations
p.183

Argon Plasma Decomposition of Porogen in Mesoporous Silica Films Studied by Positron Annihilation
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o-Ps Lifetimes in Iron Containing Micro- and Mesoporous Media
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HomeMaterials Science ForumMaterials Science Forum Vol. 733Depth Profile of Chemical Composition and Free...

Depth Profile of Chemical Composition and Free Volume of Polyurethane-Urea/Clay Nanocomposite

Abstract:

Depth profile of subsurface chemical composition and free volume in segmented polyurethane-urea/clay nanocomposites was studied by angle resolved X-ray photoelectron spectroscopy (ARXPS) and Doppler broadening energy spectroscopy (DBES) using slow positron beam. The ARXPS studies revealed increasing N/C atomic ratio (hard segment to soft segment ratio) at any given depth for the clay loaded samples compared to the neat polymer. DBES study revealed significant microstructure modification with clay loading. Self segregation of hard and soft segments in neat polymer and their interspersing with clay loading was observed from DBES measurements.

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Periodical:

Materials Science Forum (Volume 733)

Pages:

175-178

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.733.175

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Online since:

November 2012

Authors:

Sangram K. Rath, Manoranjan Patri, Priya Maheshwari, Kathi Sudarshan, Pradeep K. Pujari, Devang V. Khakhar

Keywords:

Depth Profile, Free Volume, Nanocomposite, Polyurethane-Urea, Surface Segregation

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