Is There a Minimal Chemical Mechanism Underlying Classical Avrami-Erofe’ev Treatments of Phase-Transformation Kinetic Data?

Author:

Finney Eric E.1,Finke Richard G.1

Affiliation:

1. Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523

Publisher

American Chemical Society (ACS)

Subject

Materials Chemistry,General Chemical Engineering,General Chemistry

Reference72 articles.

1. aHerein we use Khanna and Taylor’s(1b)modified form of the Avrami equation which, after slight rearrangment of eq1in the main text, is α = 1 − exp{−(kt)n}. This form allowskto be in units of time−1and is recommeded by Khanna and Taylor(1b)as well as by Galwey,(1c)although it is not preferred by others(1d)(albeit only for reasons that are a matter of preference in the final analysis(1d)). The original Avrami equation is α = 1 − exp{−k′tn}. These two equations are equivalent ifk′ =kn, although the use of these two equations does cause confusion in the solid-state kinetics literature since the resultantkandk′ have different values and units. Of interest and relevance to the present study is that Khanna and Taylor’s modified Avrami equation was proposed in at attempt to make the resultant parameters one obtains closerto being physically relevant/reasonablefor industrial polymer crystallization data.(1b)

2. Comments and recommendations on the use of the Avrami equation for physico-chemical kinetics

3. On the use and misuse of the avrami equation in characterization of the kinetics of fat crystallization

4. Kinetics of Phase Change. I General Theory

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