Melting temperature (Tm) is the temperature at which a solid material changes its state from a solid to a liquid. In the context of thermoplastic materials, Tm refers to the temperature at which the polymer chains of the material begin to move and flow, resulting in the material becoming more pliable and allowing it to be molded or shaped. The Tm of a material is influenced by factors such as the molecular weight and structure of the polymer, as well as external factors such as pressure and the presence of other compounds or additives.
Melting temperature (Tm) of starch
The melting temperature (Tm) of starch can vary depending on its source and composition. Generally, the Tm of native starches (starch in its unmodified form) is relatively high, around 200-300°C. However, Tm can be reduced through various modification techniques, such as plasticization, blending with other polymers, or chemical modification. This allows for the creation of thermoplastic starches with more desirable properties for use in various applications.