n-Nonadecane Embedded in Mesopores

Radosław Zaleski; Jacek Goworek

doi:10.4028/www.scientific.net/MSF.607.180

Paper Titles

Temperature and Pressure Measurements of PALS Spectra in Photonic Glasses
p.166

Positron Lifetime Spectroscopy on Controlled Pore Glass Porosimetry and Pore Size Distribution
p.169

Monitoring the Crystallization Stages of Silicalite by Positron Lifetime Spectroscopy
p.173

Free Volumes in Polymer Nanocomposites
p.177

n-Nonadecane Embedded in Mesopores
p.180

Investigation of Interfacial Interaction and Microstructure for Epoxy/CNTs Nanocomposites by PALS
p.183

Positron Study of Carbon Black Parameters: Structure and Surface Area
p.186

Open-Nano Pores in Natural Minerals Studied by Positron Lifetime Spectroscopy
p.189

Study of the Defect Formation of Helium in Nanocrystalline Titanium Films
p.192

HomeMaterials Science ForumMaterials Science Forum Vol. 607n-Nonadecane Embedded in Mesopores

n-Nonadecane Embedded in Mesopores

Abstract:

The ordering of n-nonadecane confined in the pores of MCM-41 silica was investigated by Positron Annihilation Lifetime Spectroscopy. No irradiation effects caused by the positron source were observed. The ortho-positronium components found in the lifetime spectra correspond to the free volumes observed in the bulk alkane plus additional space at the interface between n-nonadecane and the silica wall. Phase transitions rigid-rotator and rotator-liquid were shifted towards lower temperatures by 28 and 16 degrees respectively.