Enthalpy rheological property

Several interesting observations relate to such thermodynamic measurements. For example, the exothermic effects, associated with phase separation in LCST-type polymer blends, showed a correlation between the exothermic enthalpy and the interactions between the components (Natansohn 1985) however, the specific interaction parameter xn was not calculated. In another example, there are definitive correlations between the thermodynamic and the transport properties (see Chap. 7, Rheology of Polymer Alloys and Blends ). Thermodynamic properties of multiphase polymeric systems affect the flow, and vice versa. As discussed in Chap. 7, Rheology of Polymer Alloys and Blends , the effects of stress can engender significant shift of the spinodal temperature, AT = 16 °C. While at low stresses the effects can vary, i.e., the miscibility can either increase or decrease. 

Polymers containing polar groupings are often one of many components of a coating composition. Other components can be plasticisers, additives, solvents, fillers and pigments. Non-dispersive interactions among these components may affect numerous properties of the system, including the rheology, the mechanical properties and the adhesion characteristics. Almost all materials mentioned previously, have some electron donor or electron acceptor character and the non-dispersive enthalpy of such interactions can be estimated as the enthalpy of the acid/base interactions. 

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