| Studies on Spherulitic Morphology and Crystallization Kinetics of Poly (3-hydroxybutyrate) Blended with a Medium-Molecular-Weight Poly (Ethylene Oxide) | |
|---|---|
| 學年 | 95 |
| 學期 | 1 |
| 出版（發表）日期 | 2006-09-01 |
| 作品名稱 | Studies on Spherulitic Morphology and Crystallization Kinetics of Poly (3-hydroxybutyrate) Blended with a Medium-Molecular-Weight Poly (Ethylene Oxide) |
| 作品名稱（其他語言） | |
| 著者 | 董崇民; Don, Trong-ming; Chen, Pi-che; Shang, Wei-wei; Chiu, Hsiu-jung |
| 單位 | 淡江大學化學工程與材料工程學系 |
| 出版者 | 臺北縣：淡江大學 |
| 著錄名稱、卷期、頁數 | 淡江理工學刊=Tamkang journal of science and engineering 9(3), pp.279-290 |
| 摘要 | Spherulitic morphology and crystallization kinetics of poly(ethylene oxide)/poly(3-hydroxybutyrate) blends, PEO/P(3HB), were investigated using differential scanning calorimeter (DSC), polarized optical microscope (POM) and scanning electronic microscope (SEM). A single glass transition temperature was observed for all the blends and the Gordon-Taylor equation follows the Tg-composition dependence very well. Furthermore, the melting point of P(3HB) was depressed by the addition of PEO component and from which the interaction parameter 12 was calculated to be -0.059 using the Nishi-Wang equation. Thus, it can be concluded that P(3HB) and PEO are miscible in the level of molecular mixing. From POM and SEM observations, P(3HB) spherulites exhibit a banded texture due to the twisting of lamellar crystals. The band spacing is almost a constant, ca. 20 m, when the crystallization temperature is below 90 C, at which the maximum growth rate of P(3HB) spherulites occurs. When P(3HB) is blended with PEO, the growth rate of P(3HB) spherulites decreases because of the dilution effect and a decrease in the degree of undercooling. According to the polymer-diluent theory, the nucleation factor Kg and the folded surface free energy e of P(3HB) crystals are calculated to be 5.648 105 K2 and 47.2 erg/cm2, respectively. Both values decrease when PEO is added. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 1560-6686 |
| 期刊性質 | 國內 |
| 收錄於 | EI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | TWN |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/44385 ) |
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