This presentation reports on how the degree of intercalation of polymer chains in two dimensional silicate galleries controls the cold crystallization behavior of semi-crystalline polymer based nanocomposites. Poly[(butylene succinate)-co-adipate] (PBSA) was selected as a model semi-crystalline polymer and the PBSA nanocomposites with five different loadings of organically modified montmorillonite (OMMT) were prepared by melt-blending. The morphological investigation of these materials using scanning transmission electron microscopy revealed that the degree of dispersion of silicate layers in the nanocomposites changes from well-delaminated to intercalated and subsequently to stacked intercalated-flocculated when the OMMT loading increased from 3 to 6 wt.%. This observation was supported by the melt-state rheological property measurements. The effect of such structural changes on the cold-crystallization behavior and kinetics of nanocomposites were investigated using a high-speed differential scanning calorimeter. Surprisingly, the DSC thermograms revealed that the characteristic cold-crystallization peak of neat PBSA shifts towards higher temperatures for the nanocomposites and that the kinetics for the crystallization of the PBSA matrix retarded in the nanocomposites. This is not consistent with the general understanding of the role of dispersed silicate layers towards semicrystalline polymer cold-crystallization. The presence of different degree of polymer chains intercalation explains the observed cold-crystallization behavior and the retarded non-isothermal cold-crystallization kinetics of the nanocomposites.