More interesting, fine powder form of stereocomplex can be obtained directly. The process takes
advantage of the temperature window at which only the stereocomplex can grow and the homopoly-
mers can no longer crystallize, and develops a feasible way to overcome the molecular diffusion issue in
the stereocomplex growth. Thus this novel process provides a unique low temperature, solvent free
processing route of preparing high degree stereocomplex crystallites using high-molecular-weight pol-
ylactides that has not previously been reported.