Chemical Interaction in Blends of Biodegradable Copolyester and Tannic Acid

• Main Authors: Ping-Lin Wu, 吳秉霖
• Other Authors: Chean-Cheng Su
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/10214083753060714635

碩士 === 國立高雄大學 === 化學工程及材料工程學系碩士班 === 103 === Miscibility and tranesterification of the Poly(butylene adipate-co-butylene terephthalate)/Tannic acid (P(BA-co-44mol%BT)/TA) blends were investigated through differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analyzer (TGA) and polarized optical microscopy (POM). The result of thermal analysis revealed that the Ecoflex/TA blends were miscible. Through the analysis of Gorden-Taylor equation shows that the parameter k=3 and the interaction parameter χ12=-0.053 through Flory-Huggins equation. Ecoflex/TA blends heated at 210℃ and 195℃, and on the basic of FT-IR analysis, we found the absorbance of carbonate group decreased and absorbance of hydroxyl group shifted left. By analyzing the structure and functional group, the chemical interaction was found between Ecoflex and TA. Characterization of Ecoflex spherulites using polarized optical microscopy, the spherulite structure with a Maltese cross has been observed in the blends. After thermal annealing, the spherulite size and the rate of crystallization of Ecoflex were apparently affected in the Ecoflex/TA blends. The spherulite size increased with increasing the crystallization temperatures and content of TA. The result was concluded that the quantity of TA would interfere the crystallization of Ecoflex.