The glass-liquid alteration (or bottle alteration for short) is the capricious alteration in baggy abstracts (or in baggy regions aural semicrystalline materials) from a harder and almost breakable accompaniment into a aqueous or rubber-like state.1 An baggy solid that exhibits a bottle alteration is alleged a glass. Supercooling a adhesive aqueous into the bottle accompaniment is alleged vitrification, from the Latin vitreum, "glass" via French vitrifier.
Despite the massive change in the concrete backdrop of a actual through its bottle transition, the alteration is not itself a appearance alteration of any kind; rather it is a class abnormality extending over a ambit of temperature and authentic by one of several conventions.23 Such conventions cover a connected cooling amount (20 K/min) 1 and a bendability beginning of 1012 Pa·s, a part of others. Upon cooling or heating through this bottle alteration range, the actual aswell exhibits a bland footfall in the thermal amplification accessory and in the specific heat, with the area of these furnishings afresh getting abased on the history of the material.4 However, the catechism of whether some appearance alteration underlies the bottle alteration is a amount of continuing research.235
The bottle alteration temperature Tg is consistently lower than the melting temperature, Tm, of the apparent accompaniment of the material, if one exists.
Despite the massive change in the concrete backdrop of a actual through its bottle transition, the alteration is not itself a appearance alteration of any kind; rather it is a class abnormality extending over a ambit of temperature and authentic by one of several conventions.23 Such conventions cover a connected cooling amount (20 K/min) 1 and a bendability beginning of 1012 Pa·s, a part of others. Upon cooling or heating through this bottle alteration range, the actual aswell exhibits a bland footfall in the thermal amplification accessory and in the specific heat, with the area of these furnishings afresh getting abased on the history of the material.4 However, the catechism of whether some appearance alteration underlies the bottle alteration is a amount of continuing research.235
The bottle alteration temperature Tg is consistently lower than the melting temperature, Tm, of the apparent accompaniment of the material, if one exists.
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