LAUSR

Abstract Dynamic mechanical analysis (DMA) is one of the most common methods employed to study the materials’ composition and properties. However, the complex modulus estimates provided by DMA are well-known to show divergences between samples and loading clamps. Few works in literature explore these divergences and do not address the mathematical formulation and comparative data of complex modulus in different operational modes provided by different DMA machines. Aiming at contributing to fill this gap, this work presents an investigation on the mathematical formulation for complex modulus determined by this technique and how it is evaluated in three operational modes by three different analyzers. Measurements were performed in single cantilever, dual cantilever and three-point bending modes using basically the same test conditions. Comparisons of the results were made in order to observe the effects of testing equipment and testing parameters.