Thin films of homopolymers and cylinder-forming diblock copolymers under shear.

摘要: We study thin films of homopolymers (PS) and monolayers cylinder-forming diblock copolymers (PS–PHMA) under shear. To this end, we employed both experiments computer simulations that correctly take into account hydrodynamic interactions chain entanglements. Excellent quantitative agreement for static as well dynamic properties in the homopolymer copolymer cases was achieved. In particular, found exhibit a distinct shear thinning behavior, which is strongly correlated with disentanglement alignment constituent polymer chains. For PS–PHMA films, show can be to induce long-range ordering spontaneously self-assembled microdomains, required many applications such fabrication nanowire arrays. impact chemical incompatibility on viscosity only minor shear-aligned films. Once domains were aligned, exhibited an almost Newtonian r...