| The DSC study on physical aging of PET | |
|---|---|
| 學年 | 79 |
| 學期 | 1 |
| 發表日期 | 1990-11-05 |
| 作品名稱 | The DSC study on physical aging of PET |
| 作品名稱（其他語言） | |
| 著者 | Don, Trong-ming |
| 作品所屬單位 | 淡江大學化學工程與材料工程學系 |
| 出版者 | 臺北縣泰山鄉：明志工業專科學校 |
| 會議名稱 | 79年技術與教學研討會 |
| 會議地點 | 臺北縣, 臺灣 |
| 摘要 | Isothermal enthalpy relaxation in polyethylene terephthalate (PET) was measured at different annealing temperature below the glass transition temperature (Tg) on a differentia l scanning calorimeter (DSC) . The endothermic peaks below Tg were found on DSC scan curves and the peaks increased in magnitude and shifted to higher temperature with increasing aging time. We found the empirical fractional exponential function could describe the aging phenomena. The time constant r e in the fractional exponential function was lower at higher aging temperature It meant the aging rate was increasing with aging temperature. The temperature dependent activation energy obtained from this method was about 40 Kcal / mole. Also from the fractional exponential function fitting ,we found that the relaxation curves of samples aging at different temperatures couldn't be superimposed by a shift in time. |
| 關鍵字 | physical aging;relaxation;PET;DSC;glass transition temperature;fractional exponential function |
| 語言 | en |
| 收錄於 | |
| 會議性質 | 國內 |
| 校內研討會地點 | |
| 研討會時間 | 19901105~19901105 |
| 通訊作者 | |
| 國別 | TWN |
| 公開徵稿 | Y |
| 出版型式 | 紙本 |
| 出處 | 79年技術與教學研討會論文集，[3]-35-42 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/60187 ) |
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