dynamic mechanical analysis

This document discusses various materials testing techniques, including dynamic mechanical analysis (DMA). It defines DMA as a technique that measures the stress and strain response of a material sample to an oscillating force over time. The document outlines the DMA testing process, describing how the sample is clamped and a sinusoidal force applied, while the deformation is measured. It states that DMA can be used to measure viscoelastic properties like storage and loss modulus, and how these properties change with temperature and frequency provide information about a polymer's molecular structure and motion.