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http://dx.doi.org/10.5012/bkcs.2011.32.11.4005

2D Correlation Analysis of Spin-Coated Films of Biodegradable P(HB-co-HHx)/PEG Blends  

Kim, Min-Kyung (Department of Chemistry, and Institute for Molecular Science and Fusion Technology, Kangwon National University)
Ryu, Soo-Ryeon (Department of Chemistry, and Institute for Molecular Science and Fusion Technology, Kangwon National University)
Noda, Isao (The Procter & Gamble Company)
Jung, Young-Mee (Department of Chemistry, and Institute for Molecular Science and Fusion Technology, Kangwon National University)
Publication Information
Bulletin of the Korean Chemical Society / v.32, no.11, 2011 , pp. 4005-4010 More about this Journal
Abstract
We investigated thermal behavior of spin-coated films of P(HB-co-HHx)/PEG blends by using infraredreflection absorption (IRRAS) spectroscopy and 2D correlation spectroscopy. Based on 2D IRRAS correlation spectra, we could determine the sequence of spectral intensity changes with increasing temperature that PEG band changes first and then a band for crystalline component of P(HB-co-HHx) changes before a band for amorphous component. The intensities of bands for PEG and amorphous P(HB-co-HHx) were changed greatly as PEG weigh % of P(HB-co-HHx)/PEG blends increased. Transition temperatures of P(HB-co-HHx)/PEG blends were successfully determined by 2D gradient mapping method. The transition temperature of spincoated films of 98/2 and 90/10 P(HB-co-HHx)/PEG blends and 80/20 P(HB-co-HHx)/PEG blend determined by 2D gradient map are, respectively, about 137.5 and $132.5^{\circ}C$. Furthermore, P(HB-co-HHx)/PEG blends show an additional transition temperature that have been interpreted in terms of different lamellar thicknesses in spin coated films.
Keywords
P(HB-co-HHx)/PEG blends; Thermal behavior; 2D correlation spectroscopy; 2D gradient mapping method; Transition temperature;
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