Open AccessSuperior Performance in Liquid Crystal Alignment of Polystyrene-Block-Poly(ethylene-ran-butylene)-Block-Polystyrene-Graft-Maleic Anhydride Film Irradiated with Ion Beam
Author(s) -
Dong Hyun Kim,
Dong Hoon Lee,
Jin Young Oh,
Jeong-Hun Won,
Dae Shik Seo
Publication year - 2022
Publication title -
ecs journal of solid state science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.488
H-Index - 51
eISSN - 2162-8777
pISSN - 2162-8769
DOI - 10.1149/2162-8777/ac5eb4
Subject(s) - materials science , polystyrene , irradiation , maleic anhydride , x ray photoelectron spectroscopy , ion beam , analytical chemistry (journal) , polymer chemistry , chemical engineering , ion , composite material , copolymer , polymer , organic chemistry , chemistry , physics , nuclear physics , engineering
We studied the change of the surface and liquid crystal (LC) alignment characteristics of Polystyrene- block -poly(ethylene- ran -butylene)- block -polystyrene- graft -maleic anhydride (SEBS-g-MA) film according to ion beam (IB) irradiation. Atomic force microscopy (AFM) analysis revealed that IB irradiation reduces peaks and creates a wrinkled structure. X-ray photoelectron spectroscopy (XPS) analysis revealed that IB irradiation disintegrates the C–C bonds and makes C–O bonds, creating a dipole-dipole interaction, which improves the LC alignment characteristics. Through polarized optical microscopy (POM) analysis, it was found that the best LC alignment characteristics can be obtained after 120 s of IB irradiation. It was found that the anisotropy caused by the ion beam contributed more to the liquid crystal alignment in homogeneous direction than the one caused by the wrinkle structure.