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Evaluating the deformation kinetics of sucrose crystals using microindentation techniques
W C Duncan-Hewitt1, G C Weatherly
1Faculty of Pharmacy, University of Toronto, Ontario, Canada.
Pharmaceutical Research
|December 1, 1989
Summary
The deformation kinetics of sucrose crystals were studied using microindentation. Sucrose deformation resembles ice, suggesting similar hydrogen-bonded crystal lattice structures influence their mechanical behavior.
Area of Science:
- Materials Science
- Crystallography
- Physical Chemistry
Background:
- Understanding crystal deformation is crucial for material properties.
- Sucrose's crystal structure, rich in hydrogen bonds, suggests unique mechanical behavior.
Purpose of the Study:
- To investigate the deformation kinetics of sucrose crystals.
- To compare sucrose deformation mechanisms with other crystalline materials.
Main Methods:
- Vickers microindentation technique applied to sucrose (100) faces.
- Indentation experiments conducted at temperatures from 23 to 103°C.
- Analysis of strain rate and stress using established kinetic models.
Main Results:
- Calculated activation volume and activation energy for sucrose deformation.
- Normalized comparison of kinetic parameters with other materials.
- Identified similarities between sucrose and ice deformation kinetics.
Conclusions:
- Sucrose crystal deformation is governed by kinetics similar to ice.
- The highly hydrogen-bonded lattice structure is a key factor in sucrose's mechanical properties.