Gew. Schulze et M. Biermann, ISOTHERMAL GROWTH OF ONE SPHERULITE AROUND CIRCULAR OBSTACLES IN A POLYPROPYLENE FOIL, Journal of Materials Science, 31(3), 1996, pp. 663-671
Growth of one spherulite within a thin foil of polypropylene around on
e circular obstacle or around combinations of circular obstacles is in
vestigated. For each obstacle there exists a region of shadow, seen fr
om the nucleus of the spherulite, which influences the growth of the s
pherulite. Within any region of shadow the growth fronts are evolvents
of the obstacle's boundary, because the spherulite grows isotropicall
y. When two growth fronts belonging to one spherulite meet each other
inside the shadow, an intrinsic grain boundary is formed for each obst
acle. Additionally, growth of one spherulite around a rectangular obst
acle and a spherical obstacle is investigated.