Abstract
The kinetics of isothermal etching of isotactic polypropylene samples having different thermal treatment was studied using a mixture of concentrated sulfuric or 85% o-phosphoric acid with various amount of potassium permanganate. The course of etching was confronted with morphological features of the etched surface. It was shown that on a macroscopical scale the etching proceeds in an indiscriminate way, whereas on a scale of the basic structural elements—lamellae—it proceeds through stages of selective etching. Selective etching of isotactic polypropylene using mentioned etchants was successfully applied for morphology investigation of various kinds of surfaces.
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