Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 227, Issue 2, Pages 363-370Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1006/jcis.2000.6868
Keywords
gel; phase transition rheology
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Methods of measurement of the phase transition temperatures in physical molecular gels are analyzed. The falling ball technique, NMR, and rheology are compared. Temperature versus concentration phase diagrams can be easily obtained, and the reliability and workability of the methods are discussed. It appears that rheology is the more accurate and convenient technique while the falling ball method provides acceptable Delta H, Delta S values, but the melting temperature values are significantly altered. With NMR, kinetic information associated with the molecular aggregation process can also be extracted. (C) 2000 Academic Press.
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