Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 44, 2014
Previous Article Next Article

New molecular-scale information on polystyrene dynamics in PS and PS–BaTiO3 composites from FTIR spectroscopy

Author affiliations

Abstract

A new idea to understand the macromolecular motion occurring along the thermal relaxations of polystyrene (PS) and PS–barium titanate composites is proposed. Detailed analysis of PS infrared bands provides a better knowledge of the factors affecting polymer dynamics. Average spectral positions and integrated absorbance of bands in the region of C–H out-of-plane vibrations showed a continuous decrease with temperature, whereas those in the region of aliphatic and aromatic C–H stretching vibrations showed the sharpest changes with temperature. Relaxation temperatures were determined from the changes observed in the band wavenumber or area with temperature. These results were attributed to changes in the distribution of the phenyl π-electron cloud, causing important dipole moment variations in the different vibration modes when the thermal transitions are taking place. Finally, although the presence of BaTiO3 particles does not seem to exert any specific effect on the PS dynamics in the glassy state, the Curie transition of these particles might induce a kind of confinement effect observable by FTIR.

Graphical abstract: New molecular-scale information on polystyrene dynamics in PS and PS–BaTiO3 composites from FTIR spectroscopy

Back to tab navigation

Supplementary files

Article information


Submitted
06 Aug 2014
Accepted
26 Sep 2014
First published
30 Sep 2014

Phys. Chem. Chem. Phys., 2014,16, 24339-24349
Article type
Paper
Author version available

New molecular-scale information on polystyrene dynamics in PS and PS–BaTiO3 composites from FTIR spectroscopy

D. Olmos, E. V. Martín and J. González-Benito, Phys. Chem. Chem. Phys., 2014, 16, 24339
DOI: 10.1039/C4CP03516J

Social activity

Search articles by author

Spotlight

Advertisements