second-order transition

second-order transition

[′sek·ənd ¦ȯr·dər tran′zish·ən]
(thermodynamics)
A change of state through which the free energy of a substance and its first derivatives are continuous functions of temperature and pressure, or other corresponding variables.
References in periodicals archive ?
Thermodynamically, the glass transition is a second-order transition in which there is no discontinuity in the Gibbs free energy and its first partial derivatives such as the entropy, volume, or enthalpy at the glass transition temperature ([T.
Polymer 13 has two second-order transition temperatures, at - 66 [degrees] C and - 80 [degrees] C.
This might favor the partial dissolution of 13 in OIB due to the increased interactions between the isostearyl units and OIB and, at the same time, cause the change in the second-order transition temperatures detected experimentally.
Mozer begins an examination of CONCERT's performance by testing CONCERT on simple artificial pitch sequences, and constructs a second-order transition table from CONCERT's training set.
When the Markovian process is extended to be second order, the stage distribution at time t + 1 becomes dependent upon the distribution at time t - 1 as well as that at time t, and on second-order transition probabilities (Tanner et al.
In a second-order transition, such as the demagnetization of iron when heated, the change is continuous, exhibiting a gradual change in behavior rather than a sharp break.
The second-order transition temperature of the vitrified AO-80 is about 45[degrees]C (measured by differential scanning calorimetry, DSC) [4].
The two second-order transitions gradually approached as the AO-80 content increased.
Accordingly, the 17 censuses allowed a total of 15 sets of second-order transition probabilities to be estimated.
DSC is usually employed to evaluate phase changes such as melting and recrystallization and second-order transitions such as the glass transition.

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