Artigo Revisado por pares

Theory and application of dynamic mechanical thermal analysis

1991; Elsevier BV; Volume: 175; Issue: 1 Linguagem: Inglês

10.1016/0040-6031(91)80240-j

ISSN

1872-762X

Autores

R.E. Wetton, R.D.L. Marsh, J.G. Van-de-Velde,

Tópico(s)

Polymer crystallization and properties

Resumo

The dynamic mechanical technique of applying a sinusoidally oscillating stress to a material and the analysis of the resultant strain is now widely practised. The basic theory underlying this method is discussed and the application of dynamic mechanical analysis (DMTA) to a wide range of materials ranging from solid composites through to polymer melts is considered. Data may be collected under computer control in the temperature plane; in the frequency plane at a set of preselected temperatures; or isothermally as a function of time. Thus, the dynamic mechanical technique has been applied to a wide variety of different systems. Examples which are considered in this paper include; The study of polymer blends and phase morphology; The effect of orientation on the mechanical properties of solid polymers; The deviation of master curves using the time-temperature superposition principle; Investigation of the cure properties of thermosetting resins and fibre reinforced composites and finally, the study of melting semi-crystalline polymers. This list of applications is by no means exhaustive but will serve to illustrate the flexibility of this method for materials characterisation.

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