Abstract:

The kinetics of polymorphic transformations in monoacid satd. triglycerides and the effect of the presence of certain solid surfactants were investigated. Selected emulsifiers can be incorporated at the level of 10% by wt. within the triglyceride, without changing the crystal lattice; on the other hand, their presence affects the heat capacity of the triglyceride and the NMR relaxation time T1. Following the polymorphic transformation both during aging and during heating in the DSC, both the mechanism and rate of transformation of the triglyceride strongly depend on the kinetic conditions and on its own chem. structure. In conjunction with these results, the effect of the emulsifier is strongly dependent on the transformation conditions. The kinetic effect of the additive on the solid-solid transformation was strictly assocd. with its hydrophilic moiety structure. A model of mol. incorporation describes the arrangement of the surfactant mols. parallel to the triglyceride chains and formation of vacancies. The selectivity of the additive concerning its effect of dynamic controller of polymorphic transformations was explained by its capacity to create H bonds with the neighboring triglycerides, which was called the Button Syndrome. [on SciFinder(R)]