Add time:07/14/2019         Source:sciencedirect.com

Phase transitions of two isomeric derivatives of cholesteryl cinnamate, cholesteryl ferulate(CF) and cholesteryl isoferulate(CI), were studied by means of DSC and TAM(Thermoanalytical Microscopy).CF, cholesteryl 4-hydroxy-3-methoxycinnamate, showed two monotropic mesophases, smectic and cholesteric, and three solid polymorphs after having been melted, past the glass transition point.CI, cholesteryl 3-hydroxy-4-methoxyclnnamate, showed no glass transition but showed three solid polymorphs. It also showed a monotropic smectic phase and an enantiotropic cholesteric phase.It was concluded from the thermal history of the samples that the solid polymorphs of CF are of metastable forms, whereas those of CI are of stable forms in their respective temperature ranges.

We also recommend Trading Suppliers and Manufacturers of Cholesteryl cinnamate (cas 1990-11-0). Pls Click Website Link as below: cas 1990-11-0 suppliers