Explanation
Various mechanics and properties of materials under the action of periodically changing stress or strain, including dynamic modulus, dynamic viscoelasticity, fatigue and heat generation. The dynamic mechanical property of macromolecule are determined by its chain structure and aggregation state structure. The dynamic mechanical property of macromolecule under the change of temperature or frequency reflect the glass transition and secondary relaxation process of polymer, and are related to the change of various motion unit states of molecular chain. The chemical composition, molecular weight, intermolecular force strength, branching and crosslinking, crystallization and orientation, plasticization and phase separation, copolymerization, polymer blending, composition and other structural morphology of macromolecule will be reflected in the dynamic mechanical temperature spectrum or frequency spectrum, and damping is the most sensitive.
Classification
Organic polymer materials -> Polymer Science -> Polymer Physics