3. Vibration Forms in the Vicinity of Glass Transition, Structural Changes and the Creation of Voids When Assuming the Role of Polarizability

Under the certain so called critical temperature [1], the liquid phase becomes factually prearranged and separated into solid-like structures. Certain unoccupied vacancies existing within the space are called voids (in the obvious meaning of opening, hollowness or cavity) and are packed with gas-like molecules (so called “wanderers”). This realism has been known for a long time [2]. Some of the modern structural theories (such as the so called “mode coupling theory” – MCT, which is describing the structural phenomena of liquid state at lower temperatures) are also based on a similar scheme of the local density fluctuation [3]. Such a conjecture of heterogeneities in liquid phase goes back to the assumption of semi-crystalline phase published early by Kauzman [4], as well as to the assumptions of coexistence of gas–liquid semi-structures [5,6] as related to numerous works of Cohen, Grest and Turnbull [7–10].