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題 名 | Preparation and Characterization of Aluminum Alkoxides and Their Application to Ring-Opening Polymerization of ε-Caprolactones |
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作 者 | 余德亮; 黃清輝; 顏良富; 柯寶燦; 林助傑; | 書刊名 | Journal of the Chinese Chemical Society |
卷 期 | 47:6 2000.12[民89.12] |
頁 次 | 頁1185-1190 |
分類號 | 341.393 |
關鍵詞 | 鋁; 催化劑; 聚合; 己內酯; Aluminum; Alkoxide; Catalyst; Polymerization; Caprolactone; |
語 文 | 英文(English) |
英文摘要 | The reaction of 2-methoxybenzyl alcohol with one molar equiv of R2AlX in diethyl ether at 0 oC gives [(2-MeOC6H4CH2-��-O)AlRX]2 (1: R = Et, X = Cl, 2: R = X = Et). In addition, 2,4-di-tert-butylphenol reacts with iBu3Al affording a four-coordinated aluminum compound [(��-2,4-tBu2-C6H4O)Al(iBu)2]2 (4). Single crystal X-ray structure analysis of 4 shows a C2h-symmetry with a planar Al2O2 core. Ring-opening polymerization (ROP) of caprolactones initiated by 1, 4 and [(��-OCH2C6H4OMe)Al(iBu)2]2 (3) is performed and polyesters with narrow molecular weight distributions were obtained from the !§living!‥ ROP of caprolactones. 1H NMR spectroscopic studies of PCL reveal that the initiator of 1 and 3 is through the Al-OAr function, but the initiator of 4 is through the Al- iBu group. |
本系統中英文摘要資訊取自各篇刊載內容。