Journal
POLYMER
Volume 50, Issue 20, Pages 4859-4867Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2009.06.070
Keywords
Gelatin; Kinetics; Differential scanning calorimetry
Categories
Funding
- The American Chemical Society Petroleum Research Fund [46760-AC7]
Ask authors/readers for more resources
10, 20, and 40 wt.% aqueous gelatin gels were prepared under isothermal (annealing at 15, 20, and 25 degrees C for 15 to 120 min) and nonisothermal (cooling at 1 degrees C min(-1)) conditions. Isoconversional kinetic analysis of DSC data on gel melting (gel-sol transition) of all types of gels revealed significant variations in the activation energy throughout the process. Activation energy barrier to melting of isothermally prepared gels was in the range 160-190 kJ mol(-1) and found to increase with increasing the annealing temperature that was the major effect discovered. Activation energy barrier to melting of nonisothermally prepared gels was determined to be around 120-140 kJ mol(-1) and increase with increasing the concentration. Local reversibility of the gel melting was demonstrated by using temperature modulated DSC. (C) 2009 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available