Banded cores and non-banded shells with transitional patterns in stereocomplexed polylactic acid sc-PLA PLLA PDLA 1 1 interacting with amorphous polyp-vinyl phenol PVPh 2030 wt were investigated by using polarized optical POM atomic force AFM and scanning electron microscopy SEM. The central core of the spherulites is ring-banded which transitions into non-banded patterns on the outer peripheral in sc-PLAPVPh blends crystallized at Tc 160180 C. This composite crystal morphology is distinctly different from that of the neat sc-PLA which is a Maltese-cross without any ring patterns in spherulites. The bands in the core region are also dramatically different from those bands with birefringence contrasts observed in classical ring-bands. The bands in the core show only crystal topology and no birefringence difference. Both regions of ring-banded and non-banded crystals are composed of edge-on lamellae but the central-core lamellae undergo periodical waving up and down. The specific stage-wise and preferential interactions between PVPh and sc-PLA and glass substrate which simultaneously occur during amorphous PVPh rejection and growth processes were evaluated as some plausible kinetic reasons for the special composite crystal morphology of sc-PLA complex induced by blending with PVPh.