Raman spectra of polyethylene glycol/cellulose acetate butyrate biopolymer blend

• Published in: Journal of physics. Conference series Vol. 1869; no. 1; p. 12006
• Main Authors: Marlina, D, Novita, M, Anwar, M T, Kusumo, H, Sato, H
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.04.2021
• Subjects: Banded structure; Biopolymers; Cellulose; Cellulose acetate; Cellulose acetate butyrates; Crystal structure; Crystallinity; Hydrogen bonds; Physics; Polyethylene glycol; Raman spectra; Raman spectroscopy; Spectrum analysis; Stretching; Transition points
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/1869/1/012006

Abstract In order to investigate their crystalline structure conformations, several ratio combinations of polyethelene glycol (PEG)/cellulose acetate butyrate (CAB) were studied by Raman spectroscopy. PEG/CAB spectral features due to the composition dependence revealed the gradual transformation from crystalline PEG-like structure to the amorphous CAB-like structure as increasing the ratio of CAB. Bands appeared in the C-H stretching area of 3000– 2700 cm −1 and C-H bending area of 1500–1400 cm −1 clearly exposed the transition of the PEG to the CAB-spectral features with the transition point at about PEG/CAB (30/70). Band at 1737 cm −1 in the C=O stretching area of 1800–1650 cm −1 described the existence of a very weak hydrogen bond arise between PEG and CAB. In the C-O-C area of 1000–800 cm −1 , drastic spectral change suggested that the hydrogen bond interaction takes place in the back bone of PEG.