Novel Ternary Blends with Chemically Hydrogen
23rd IUPAC Conference on Physical Organic Chemistry (ICPOC23) 3rd – 8th July 2016 • Sydney • Australia
Novel Ternary Blends with Chemically Hydrogen-bonding Interactions Li-Ting Lee,a,* Huei-Ru Chiena and Chun-Ting Yanga a
Department of Materials Science and Engineering, Feng Chia University, Taichung, Taiwan Email: [email protected] and [email protected]
Abstract Blends of functions materials have attracted a lot of interests.1-2 A novel miscible ternary blending system with chemically hydrogen-bonding interactions was discovered. The blending system composes of two biodegradable polymers, poly(ethylene azelate) (PEAz) and poly(ε-caprolactone) (PCL), and a natural polyphenol, catechin. Microscopic examinations displayed homogeneous phase morphology in the PEAz/catechin/PCL blends. Results of thermal analysis demonstrated a single composition-dependent glass transition (Tg) for each of the ternary compositions, indicating that the blends are miscible. Fourier-transform infrared spectroscopy (FTIR) was conducted to investigate the possible interactions in the blends. It attempted to discover the factor that generates the miscibility in the ternary blends. Fig. 1(a) demonstrates IR spectra in the hydroxyl-stretching region for the blends. As the content of polyesters (PEAz and PCL) was increased, the absorption peak of catechin was gradually shifted from 3360 cm-1 to 3450 cm-1, suggesting the formation of hydrogen bonds between catechin and two polyesters. Fig. 1(b) shows the IR spectra in the carbonyl-stretching region for various blending compositions. As the content of catechin was increased, a new adsorption shoulder at 1712 cm-1 was developed. This new adsorption might be attributed to the presence of hydrogen-bonding interactions in the blends. Both hydroxyl- and carbonyl-stretching spectra of IR provided significant evidence for the formation of chemically hydrogen-bonding interactions in the blends. The presence of this kind of interaction between catechin and two polyesters could be the main reason that generates the ternary miscibility in the blends. The inherent biodegradability of PEAz and PCL and the biocompatibility of catechin enable these blends to be used for manufacturing functional polymeric materials in the near future. (a)
(b)
Fig.1 FTIR spectra of (a) hydroxyl-stretching region; and (b) carbonyl-stretching region for PEAz/catechin/PCL blends with various compositions.
References 1. 2.
Chen, L. L.; Liu, H. H.; Lin J. S. Macromolecules 2000, 33, 4856-4860. Woo, E. M.; Chiang C. P. Polymer 2004, 45, 8415-8424.
TU40
Novel Ternary Blends with Chemically Hydrogen-bonding Interactions Li-Ting Lee,a,* Huei-Ru Chiena and Chun-Ting Yanga a
Department of Materials Science and Engineering, Feng Chia University, Taichung, Taiwan Email: [email protected] and [email protected]
Abstract Blends of functions materials have attracted a lot of interests.1-2 A novel miscible ternary blending system with chemically hydrogen-bonding interactions was discovered. The blending system composes of two biodegradable polymers, poly(ethylene azelate) (PEAz) and poly(ε-caprolactone) (PCL), and a natural polyphenol, catechin. Microscopic examinations displayed homogeneous phase morphology in the PEAz/catechin/PCL blends. Results of thermal analysis demonstrated a single composition-dependent glass transition (Tg) for each of the ternary compositions, indicating that the blends are miscible. Fourier-transform infrared spectroscopy (FTIR) was conducted to investigate the possible interactions in the blends. It attempted to discover the factor that generates the miscibility in the ternary blends. Fig. 1(a) demonstrates IR spectra in the hydroxyl-stretching region for the blends. As the content of polyesters (PEAz and PCL) was increased, the absorption peak of catechin was gradually shifted from 3360 cm-1 to 3450 cm-1, suggesting the formation of hydrogen bonds between catechin and two polyesters. Fig. 1(b) shows the IR spectra in the carbonyl-stretching region for various blending compositions. As the content of catechin was increased, a new adsorption shoulder at 1712 cm-1 was developed. This new adsorption might be attributed to the presence of hydrogen-bonding interactions in the blends. Both hydroxyl- and carbonyl-stretching spectra of IR provided significant evidence for the formation of chemically hydrogen-bonding interactions in the blends. The presence of this kind of interaction between catechin and two polyesters could be the main reason that generates the ternary miscibility in the blends. The inherent biodegradability of PEAz and PCL and the biocompatibility of catechin enable these blends to be used for manufacturing functional polymeric materials in the near future. (a)
(b)
Fig.1 FTIR spectra of (a) hydroxyl-stretching region; and (b) carbonyl-stretching region for PEAz/catechin/PCL blends with various compositions.
References 1. 2.
Chen, L. L.; Liu, H. H.; Lin J. S. Macromolecules 2000, 33, 4856-4860. Woo, E. M.; Chiang C. P. Polymer 2004, 45, 8415-8424.
TU40
