Explanation

Non crosslinking macromolecule will flow under a small external force at a higher temperature. Its deformation increases irreversibly with time, but it still maintains a special state of partial elasticity, which is usually called viscous flow state. The most common viscous flow state of polymer is the melt state of polymer. At this time, its apparent viscosity drops sharply with the increase of temperature. Generally, the properties of viscous flow state state can be described by Arrhenius equation, and the activation or conditioning energy E_ The size of a depends on the characteristics of materials. The larger the activation or conditioning energy is, the more sensitive the viscosity is to temperature changes. Therefore, it is of great significance to study the viscous flow state characteristics of macromolecule materials for macromolecule molding. In the process of macromolecule molding, materials will undergo deformation under the viscous flow state, so understanding and controlling the viscous flow state characteristics can help optimize the process and improve the molding quality.

Classification