Abstract:

The appearance of the $\beta$' form in the $\alpha$-$\beta$ transformation in tristearin was hardly detectable. On the other hand, in mixts. of tristearin and tripalmitin at different ratios, $\beta$' formation was favored. This observation confirmed the statement in the literature that in mixts. of different chain lengths orthorhombic packing was stabilized. When an emulsifier (sorbitan monostearate) was added to the mixts., both the $\beta$' and $\beta$ formation were inhibited. The effect caused by the addn. of the emulsifier as an impurity to tristearin was compared to that caused by the addn. of tripalmitin: their effects, although both kinetic, were very different. [on SciFinder(R)]