Transition of lamellae-cylindrical microdomains according to midblock length in A<sub>1</sub>BA<sub>2</sub>C tetrablock terpolymer.
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초록
내용
A key prerequisite for applications of nanostructured block copolymer (BCP) self-assembly is the ability to generate complex geometries. Multiblock copolymer composed of more than three different chemicals is suitable for discovery of complex morphologies that have never been seen before. Here, we investigated, via SAXS and TEM, the morphology of polystyrene-b-polyisoprene-b-polystyrene-b-poly(2-vinylpyridine) (S1IS2V) tetrablock terpolymer. We discovered the transition from complicated lamellae structure to hierarchical cylindrical nanostructures according to mid-block length of PS2 chain. The experimentally observed morphology is in good agreement with the predicted equilibrium phases by self-consistent filed theory (SCFT).