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Raman spectra of polyethylene glycol/cellulose acetate butyrate biopolymer blend
Ist Teil von
Journal of physics. Conference series, 2021-04, Vol.1869 (1), p.12006
Ort / Verlag
Bristol: IOP Publishing
Erscheinungsjahr
2021
Quelle
EZB Electronic Journals Library
Beschreibungen/Notizen
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.