Nanostructured thin films of polymer blends by directional crystallization onto crystallizable organic solvent

A study was conducted, to demonstrate a method that employed directional crystallization of crystalline and amorphous miscible polymer blends onto crystallizable solvents, to overcome the limitations of synthetic process of forming block copolymers. Poly(L-lactic acid) (PLLA) as a blend component, to demonstrate the development of periodic nanopatterns, with polymer blends. Thin film PLLA blends on glass coverslips were formed from dilute chloroform solution by the process of spin-coating, to demonstrate the method. It was also demonstrated that amorphous layer thickness can be tuned by changing the composition of polymer blend. The results of the study show that the new method is a facile and efficient way, to produce lamellar orientation in thin films that have the potential of fabricating nanostructural materials.