Thermal Properties Phase Change Behavior

Abstract. After a brief introduction on zeolite constitution, structure and properties, the suitability of thermal analysis in characterizing the zeolite materials and in investigating their potential behavior in different application fields is analyzed. Kinetics and thermodynamics of water desorption, thermal stability, phase transformations, occluded phase decomposition and gas evolution, structure collapse and recrystallization, change in electrical properties, all in relation to thermal treatments, are the specific subjects reviewed. Use of thermal analysis in the evaluation of zeolite content in multicomponent mixtures and in the characterization of zeolite catalysts are the two additional main topics discussed. 

All these results clearly show that PES-C-PEO blends are miscible and exhibit an LCST behavior. However, as shown above, different thermal behaviors are shown by the miscible blends of PES-C and PEO, depending on the blend composition. Blends with different compositions display different changes in thermal properties when phase separation occurs. Therefore, the investigation of phase separation should be performed in the light of the blend compositions. The studies of phase separation process are discussed in detail as below. 

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