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| Content Provider | Springer Nature Link |
|---|---|
| Author | Hirose, S. Hatakeyama, T. Izuta, Y. Hatakeyama, H. |
| Copyright Year | 2002 |
| Abstract | Thermal degradation behaviour of alcoholysis lignin-based polycaprolactones (ALPCL's) with various molar ratios of β-caprolactone monomer to each hydroxyl group of lignin (CL/OH ratios) was studied by TG-FTIR. The temperature was varied from 20 to 800°C. Thermal degradation temperatures (T$_{d}$'s) of alcoholysis lignin (AL) and ALPCL's were determined using TG curves. T$_{d}$ increased with increasing CL/OH ratio, suggesting that AL becomes thermally stable after the derivatization with PCL chains. Mass residue (MR) at 500°C was also determined using TG curves. MR values decreased with increasing CL/OH ratios. The evolved gases formed by thermal degradation of ALPCL's at various temperatures were simultaneously analyzed by FTIR. The main peaks observed for the samples are as follows: wavenumber (assignment): 1160 cm$^{-1}$ (vC-O-), 1260 cm$^{-1}$(-C(=O)-O-C-), 1517 and 1617 cm$^{-1}$ (vC=C), 1770 cm$^{-1}$ (vC=O), 2345 cm$^{-1}$ (vCO2), 2945 cm$^{-1}$ (vC-H) and 3700 cm$^{-1}$ (vOH). It was found that the peak intensities for C=O, CH, C-O-C, OH peaks, which were observed for evolved gases at 430°C, increased with increasing CL/OH ratios, suggesting that the evolved gases at 430°C are mainly formed by thermal degradation of PCL chains in ALPCL's. |
| Starting Page | 853 |
| Ending Page | 860 |
| Page Count | 8 |
| File Format | |
| ISSN | 13886150 |
| Journal | Journal of thermal analysis |
| Volume Number | 70 |
| Issue Number | 3 |
| e-ISSN | 15728943 |
| Language | English |
| Publisher | Kluwer Academic Publishers |
| Publisher Date | 2002-01-01 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Inorganic Chemistry Physical Chemistry Polymer Sciences Measurement Science, Instrumentation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physical and Theoretical Chemistry Condensed Matter Physics |
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