Positron Lifetime Annihilation Study of Porous Composites and Silicas Synthesized Using Polymer Templates

Marek Gorgol; Agnieszka Kierys; Radosław Zaleski

doi:10.4028/www.scientific.net/DDF.373.280

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Influence of the Crosslinking Content on the Structural Properties of Polybutadiene Rubbers with Different Isomeric Composition
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Study of Gamma Irradiation Effect on Unplasticized PVC by Positron Annihilation
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Positron Lifetime Annihilation Study of Porous Composites and Silicas Synthesized Using Polymer Templates
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Investigation of Micro-Sized Capsules at High Pressure by PALS Method
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Positron Annihilation Lifetime Spectroscopy Application to In Situ Monitoring of n-Heptane Sorption in Mesopores
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Characterisation of Porosity in Zirconia-Based Nanopowders
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Positron Lifetime Annihilation Study of Porous Composites and Silicas Synthesized Using Polymer Templates

Abstract:

The porous structure of polymer-silica composites, based on three polymer templates, which differ in a porosity and hydrophobicity, was examined using positron annihilation lifetime spectroscopy. Additionally, the investigation of silicas obtained after removal of polymers during calcination of composite materials, was performed. In composites based on hydrophobic polymers, silica condensates only in larger free volumes, while SiO₂ deeply penetrates spaces between polymer chains, when the template is polar. Moreover, the structure of the silica gel, obtained after polymer removal, depends on chemical character of the template, rather than its porosity.

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Periodical:

Defect and Diffusion Forum (Volume 373)

Pages:

280-283

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.373.280

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Online since:

March 2017

Authors:

Marek Gorgol*, Agnieszka Kierys, Radosław Zaleski

Keywords:

Polymer-Silica Composites, Porous Polymers, Positron Annihilation, Silica Gels

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