Kinetics of Nonisothermal Degradation of Some Polymer Composites : Change of Entropy at the Formation of the Activated Complex from the Reagents
Joint Authors
Vlaev, Lyubomir
Turmanova, Sevdalina
Genieva, Svetlana
Source
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-06-21
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Studying the nonisothermal kinetics of degradation of rice husks in air or nitrogen atmosphere, polypropylene and tetrafluoroethylene-ethylene copolymer filled with different quantities of rice husks flour or the products of its thermal degradation, namely “white” or “black” rice husks ash, a linear dependence was observed between the lnA and EA, known as the kinetic compensation effect or theta rule.
A linear relationship was also established between EA and the change of the entropy ΔS≠ for the formation of the activated complex from the reagents.
These dependences are related to the assumption of identical kinetic mechanisms of thermal degradation of the composites studied.
The negative values of ΔS≠ obtained show that the activated complex is a “more organized” structure than the initial reactants and that these reactions may be classified as “slow” ones.
It may be concluded that the products of the thermal degradation of rice husks in a fluidized bed reactor can successfully replace the more expensive synthetic fillers to obtain different polymer composites.
These polymer composites can lead to the futuristic “organic-inorganic hybrid materials” with specific properties.
American Psychological Association (APA)
Turmanova, Sevdalina& Genieva, Svetlana& Vlaev, Lyubomir. 2011. Kinetics of Nonisothermal Degradation of Some Polymer Composites : Change of Entropy at the Formation of the Activated Complex from the Reagents. Journal of Thermodynamics،Vol. 2011, no. 2011, pp.1-10.
https://search.emarefa.net/detail/BIM-484504
Modern Language Association (MLA)
Turmanova, Sevdalina…[et al.]. Kinetics of Nonisothermal Degradation of Some Polymer Composites : Change of Entropy at the Formation of the Activated Complex from the Reagents. Journal of Thermodynamics No. 2011 (2011), pp.1-10.
https://search.emarefa.net/detail/BIM-484504
American Medical Association (AMA)
Turmanova, Sevdalina& Genieva, Svetlana& Vlaev, Lyubomir. Kinetics of Nonisothermal Degradation of Some Polymer Composites : Change of Entropy at the Formation of the Activated Complex from the Reagents. Journal of Thermodynamics. 2011. Vol. 2011, no. 2011, pp.1-10.
https://search.emarefa.net/detail/BIM-484504
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-484504