Application of principal component analysis-based two-dimensional correlation spectroscopy to characterization of order-disorder transition of polystyrene-block-poly(n-pentyl methacrylate) copolymer
- Title
- Application of principal component analysis-based two-dimensional correlation spectroscopy to characterization of order-disorder transition of polystyrene-block-poly(n-pentyl methacrylate) copolymer
- Authors
- Jung, YM; Kim, HJ; Ryu, DY; Bin Kim, S; Kim, JK; 김진곤
- Date Issued
- 2006-01
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- Principal component analysis-based two-dimensional (PCA2D) correlation spectroscopy through eigenvalue manipulating transformation (EMT) of spectral data set was applied to temperature-dependent IR spectra of polystyrene-block-poly(n-pentyl methacrylate) (PS-PnPMA) for spectral selectivity enhancement. EMT technique which uniformly lowers the power of a set of eigenvalues associated with the original data highlights the subtle contributions from minor eigenvectors. Thus subtle differences in the thermal responses of PS-PnPMA, which are difficult to observe by conventional 2D correlation analysis, are accentuated much more strongly than the original data. A conclusion was reached on details of phase transition of PS-PnPMA which exhibited a closed-loop phase behavior bounded by a lower disorder-to-order transition (LDOT) and an upper order-to-disorder transition (UODT). We found that a disordered state at lower temperature is different from that at higher temperature. (c) 2006 Elsevier B.V. All rights reserved.
- Keywords
- two-dimensional correlation spectroscopy; PCA2D correlation spectroscopy; eigenvalue manipulating transformation; closed-loop block copolymer; phase transitions; MANIPULATION TRANSFORMATION EMT; PHASE-BEHAVIOR; POLY(TERT-BUTYL METHACRYLATE); LANGMUIR-BLODGETT; FTIR SPECTROSCOPY
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/23715
- DOI
- 10.1016/J.MOLSTRUC.2
- ISSN
- 0022-2860
- Article Type
- Conference
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- There are no files associated with this item.
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