Study of the pre-melting behavior of polyethylene using Raman spectroscopy combined with two-dimensional (2D) correlation spectroscopy
- Authors
- Shinzawa, Hideyuki; Ozaki, Yukihiro; Chung, Hoeil
- Issue Date
- May-2012
- Publisher
- ELSEVIER
- Keywords
- Polyethylene (PE); Density; Raman spectroscopy; Generalized two-dimensional (2D) correlation spectroscopy; Hetero correlation analysis
- Citation
- VIBRATIONAL SPECTROSCOPY, v.60, pp.154 - 157
- Indexed
- SCIE
SCOPUS
- Journal Title
- VIBRATIONAL SPECTROSCOPY
- Volume
- 60
- Start Page
- 154
- End Page
- 157
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/165712
- DOI
- 10.1016/j.vibspec.2011.11.007
- ISSN
- 0924-2031
- Abstract
- The thermal behavior of polyethylene (PE) below its melting temperature (T-m) in relation to the density variation was studied by Raman spectroscopy combined with two-dimensional (2D) correlation analysis. The Raman spectra of homo and 1-octene copolymerized PEs were collected by varying the sample temperature from 30 to 100 degrees C, where pre-melting would occur. The spectral variation upon temperature perturbation was dependent on the density. For a deeper understanding of the thermal behaviors, 2D hetero correlation analysis was performed for the temperature-dependent Raman spectra of homo and 1-octene copolymerized PEs. The hetero-sample correlation analysis revealed that even below T-m, co-monomer side chains excluded from the crystalline lattice of the PE underwent partial fusion, indicating that such a conformational defect was closely related to the pre-melting of PE.
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