Explanation
It is the transformation between the glassy state state and the high elastic slate of amorphous polymers (including the amorphous phase of some crystalline polymers). The essence of molecular motion is that the transformation between chain segment freezing and motion is nearby. The physical parameters characterizing macromolecule, such as modulus, specific volume, specific heat [capacity, coefficient of thermcal expansion, refractive index and dielectric constant, show discontinuous changes.
Classification
Organic polymer materials -> Polymer Science -> Polymer Physics