Paper Title:
Low Frequency Relaxation in Block Copolymers and Nanocomposites
| Periodical | Materials Science Forum (Volume 714) |
|---|---|
| Main Theme | Polymer Composite Materials: From Macro, Micro to Nanoscale |
| Edited by | Abderrahim Boudenne |
| Pages | 67-72 |
| DOI | 10.4028/www.scientific.net/MSF.714.67 |
| Citation | Anton Santamaria et al., 2012, Materials Science Forum, 714, 67 |
| Online since | March, 2012 |
| Authors | Anton Santamaria, Mercedes Fernández, María Eugenia Muñoz |
| Keywords | Block-Copolymer, Carbon Nanotubes (CNT), Loss Tangent, Mechanical Relaxation, Nanocomposite |
| Price | US$ 28,- |
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Abstract
Results of the loss tangent, tan δ, at low frequencies, obtained for a SEBS copolymer and carbon nanotube (CNT)/polyurethane (PUR) nanocomposites, are analysed. The hindering effect of nanostructures (i.e. ordered domains or nanoparticles) on the motion of polymer chains is revealed by the occurrence of a mechanical relaxation at low frequencies. In the case of SEBS copolymer, the effect of domains orientation and extender oil on a characteristic time associated with the relaxation is investigated. For CNT/PUR nanocomposites, the variation of the frequency at which the relaxation takes place, with CNT concentration and temperature, reveals that the interactions between the nanotubes and the polymer chains are improved with temperature
