scholarly journals Sorption: A Statistical Thermodynamic Fluctuation Theory

Langmuir ◽  
2021 ◽  
Author(s):  
Seishi Shimizu ◽  
Nobuyuki Matubayasi
Keyword(s):  
Fluctuation Theory ◽  
Statistical Thermodynamic ◽  
Thermodynamic Fluctuation

scholarly journals A Study of Isothermal Curing of PMI Using DMA

2015 ◽  
Vol 2015 ◽  
pp. 1-12
Author(s):  
Jing Zhang ◽  
Rui Ye ◽  
Jun Zou ◽  
Jijun Tang ◽  
Hongliang Wang
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Nonequilibrium Thermodynamic ◽  
Fluctuation Theory ◽  
Avrami Equation ◽  
High Temperature Range ◽  
Dynamic Mechanical ◽  
Temperature Range ◽  
Thermodynamic Fluctuation ◽  
Relative Conversion

The isothermal curing of polymethacrylimide (PMI) is studied through the use of dynamic mechanical analysis (DMA). Based on the growth rate of measured dynamic mechanical property, the relative conversion is defined to investigate the evolution of storage modulusE′at different curing temperatures. Hsich’s nonequilibrium thermodynamic fluctuation theory, Avrami equation, and isoconversional methods are used to analyze isothermal cure kinetics of PMI. The results show that there are different increase modes ofE′at low temperature range and high temperature range, respectively. In low temperature range, the relative conversion curves include a transitional stage which is found to be strongly frequency-dependent, but this stage is not observed in the relative conversion curve in high temperature range. During the isothermal curing process, the relative evolution ofE′can be described by Hsich’s nonequilibrium thermodynamic fluctuation theory and Avrami equation. Moreover, the values and evolutions of activation energy are different in two temperature ranges, which suggest that the curing mechanism probably has changed.

On the Formalism of Thermodynamic Fluctuation Theory

1951 ◽  
Vol 83 (6) ◽  
pp. 1231-1235 ◽  
Author(s):  
Richard F. Greene ◽  
Herbert B. Callen
Keyword(s):  
Fluctuation Theory ◽  
Thermodynamic Fluctuation

Fluctuation Theory of Random Copolymers

1995 ◽  
Vol 5 (3) ◽  
pp. 365-377 ◽  
Author(s):  
Andrey V. Dobrynin ◽  
Igor Ya. Erukhimovich
Keyword(s):  
Fluctuation Theory ◽  
Random Copolymers

Fluctuation Theory of Charged AB-Random Copolymers

1995 ◽  
Vol 5 (8) ◽  
pp. 1241-1253 ◽  
Author(s):  
Andrey V. Dobrynin
Keyword(s):  
Fluctuation Theory ◽  
Random Copolymers
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