Picture of a sphere with binary code

Making Strathclyde research discoverable to the world...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. It exposes Strathclyde's world leading Open Access research to many of the world's leading resource discovery tools, and from there onto the screens of researchers around the world.

Explore Strathclyde Open Access research content

Dynamic mechanical analysis of poly(trimethylene terephthalate) - a comparison with poly(ethylene terephthalate) and poly(ethylene naphthalate)

Mackintosh, A.R. and Liggat, J.J. (2004) Dynamic mechanical analysis of poly(trimethylene terephthalate) - a comparison with poly(ethylene terephthalate) and poly(ethylene naphthalate). Journal of Applied Polymer Science, 92 (5). 2791 -2796. ISSN 0021-8995

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

The fiber properties of PTT have been the subject of several reports, although very few reports describe the properties of molded specimens. In this work, the dynamic mechanical relaxation behavior of compression-molded PTT films has been investigated. The added flexibility of the PTT was found to lower the temperature of the - and -transitions relative to the PET and PEN. The results suggest that the -transition is at least two relaxations for PET and PTT due to the increase in the breadth of the relaxation. The results seem to support the hypothesized mechanism of others, in that the -transition involves the relaxation of the carbonyl entity and the aromatic C1-C4 ring flips for PTT and PET, and the relaxation of the carbonyl for PEN. The *- and -transitions for all three polymers seem to be cooperative in nature.