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Thermal Degradation of Biodegradable Poly(butylene adipate-co-terephthalate)/Starch Blends
| Content Provider | Semantic Scholar |
|---|---|
| Author | Chiangga, S. Suwannasopon, Satayu |
| Copyright Year | 2012 |
| Abstract | Thermal degradation of biodegradable poly(butylene adipate-co-terephthalate) /starch (PBAT/S) blends of 15 µm thickness was investigated by thermogravimetric analysis in a nitrogen atmosphere and in an air atmosphere at a flow rate of 20 mL.min -1 . The non-isothermal experiments were conducted at five constant heating rates (β = 1, 2, 5, 10 and 15 o C.min -1 ) from 100 to 800 o C. The thermogravimetric curves showed two degradation stages in a nitrogen atmosphere and three degradation stages in an air atmosphere. The second stage occurred at temperatures from 366 to 418 and 369 to 421 o C respectively. Three models—namely, the model-free isoconversion methods of Kissinger-Akahira-Sunose (KAS), Ozawa-Flynn-Wall (OFW) and Friedman (FR) were used to determine the dependence of the apparent activation energy Eα. The results showed higher Eα values on conversion α in the nitrogen atmosphere. The average Eα levels were 172, 174 and 173 kJ.mol -1 in the nitrogen atmosphere and 159, 159 and 160 kJ. mol -1 in the air atmosphere for the KAS, OFW and FR methods, respectively. This confirmed that |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://kasetsartjournal.ku.ac.th/kuj_files/2012/A1210101453433437.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
