Picture of person typing on laptop with programming code visible on the laptop screen

World class computing and information science research at Strathclyde...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

The Department also includes the iSchool Research Group, which performs leading research into socio-technical phenomena and topics such as information retrieval and information seeking behaviour.

Explore

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.