吡啶亞胺鈉及草醯胺鈉錯合物應用於環酯類開環聚合反應

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陳峙宇(Chih-Yu Chen) 查詢紙本館藏

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化學學系

論文名稱

吡啶亞胺鈉及草醯胺鈉錯合物應用於環酯類開環聚合反應

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至系統瀏覽論文 (2028-7-26以後開放)

摘要(中)

開環聚合反應是由環狀單體透過有機催化劑或有機金屬催化劑與起始劑經由加成反應成為線性或環狀聚合物 ; 是合成可生物降解性聚合物的一種有效方法。在配位基選擇上，由於醯胺類化合物其結構含有NH鍵、C=O鍵，易與中心金屬產生交互作用；亞胺類化合物其結構中N的電子對能調節中心金屬電子環境，因此本實驗合成出草醯胺結構、吡啶亞胺結構的配位基。實驗為使用不同的鈉醇鹽與配位基形成鈉金屬錯合物，並添加醇類作為起始劑，應用於環酯類單體ε-己內酯 (ε-CL)、L-丙交酯 (L-LA) 和δ-戊内酯 (δ-VL) 的開環聚合。根據實驗結果顯示，草醯胺結構配位基與叔丁醇鈉形成的錯合物，若不添加起始劑時，雖然會使單體開環聚合，但其分子量分布度較差 (Ð = 2.89)；當添加醇類為起始劑反應時，對三種單體都有良好的聚合轉換速率，且分子量分布度較好 (ε-CL conv.= 99% in 2 min，Ð = 1.28)。吡啶亞胺結構的配位基與叔丁醇鈉形成的錯合物，在ε-CL、L-LA單體的開環聚合中表現出較高的反應活性 (ε-CL conv.= 93% in 1 min、L-LA conv.= 96% in 1 min)。

摘要(英)

Ring-opening polymerization is one type of polymerization reactions using cyclic molecules as its monomers catalyzed by organic or organometallic compounds with or without alcohol initiators to form linear or cyclic polymers. It is an effective method for synthesizing biodegradable polymers. In this study, I synthesized oxamide ligands and Schiff base ligands. Oxamide ligands contain N-H bond and C=O bond functional groups ; Schiff base ligands contain one lone electron pair of the nitrogen atom. Both ligands are easy to interact with the central metal. This experiment used different sodium salts and alcohol initiators as experimental conditions in ring-opening polymerization of ε-caprolactone (ε-CL), L-lactide (L-LA) and δ-valerolactone (δ-VL). According to the experimental results, if initiator is not added with the oxamide ligands, the dispersity is worse (Ð = 2.89) than adding initiator (ε-CL conv.= 99% in 2 min, Ð = 1.28). Schiff base ligands exhibited high reactivity in the ring-opening polymerization of ε-CL and L-LA monomers (ε-CL conv.= 99% in 2 min, Ð = 1.28).

關鍵字(中)

★ 開環聚合
★ 環酯類單體
★ 草醯胺配位基

關鍵字(英)

★ ring-opening polymerization
★ cyclic esters monomer
★ oxamide ligands

論文目次

中文摘要 v
Abstract vi
謝誌 vii
目錄 viii
圖目錄 xi
表目錄 xiii
第一章、緒論 1
1-1 前言 1
1-2 開環聚合反應 2
1-2-1 開環聚合機制 2
1-3 環酯類化合物 6
1-3-1 環內酯單體- ε-己內酯 9
1-3-2 環內酯單體-丙交酯 11
1-3-3 環內酯單體-五環γ-丁內酯 12
1-4 鈉金屬催化劑 17
1-4-1 脲 (urea) 催化劑 27
1-4-2 草醯胺化合物 33
1-4-3 bisindole催化劑 40
1-4-4 吡啶亞胺配位基 45
1-5 研究動機 51
第二章、實驗部分 54
2-1 鑑定儀器 54
2-2 溶劑及藥品處理 54
2-3 3,4-T6GBL單體合成 56
2-4 配位基合成 58
2-4-1 oxalamide配位基合成 58
2-4-2 5,5′,7,7′-tetramethyl-1H,1′H-2,2′-biindole配位基 (L2) 合成 60
2-4-3 2,4,6-trimethyl-N-(2-pyridinylmethylene)benzenamine配位基 (L3) 合成 61
2-4-4 2,6-bis(1-methylethyl)-N-(2-pyridinylmethylene)benzenamine配位基 (L4)合成 62
2-5 鈉鹽與配位基反應應用於單體開環聚合 63
2-6 GPC樣品處理步驟 64
第三章、結果與討論 65
3-1 L2配位基與鈉鹽反應對ε-己內酯進行開環聚合反應 65
3-2 金屬醇鹽與L1草醯胺配位基對環內酯單體的開環聚合 68
3-2-1 金屬鹽類與草醯胺配位基對ε-己內酯進行開環聚合 69
3-2-2 改變起始劑對ε-己內酯的開環聚合反應 71
3-2-3 改變起始劑對左旋丙交酯 (L-LA) 的開環聚合反應 74
3-2-4 改變起始劑對δ-戊內酯的開環聚合反應 77
3-3 叔丁醇鈉與吡啶亞胺配位基對環內酯單體的開環聚合 78
3-3-1 L3配位基與叔丁醇鈉對ε-己內酯的開環聚合 79
3-3-2 L3或L4配位基與叔丁醇鈉對單體的開環聚合 80
3-4 催化劑對3,4-T6GBL單體的開環聚合 83
第四章、結論 85
參考文獻 86
附錄 93
NMR圖譜 91
GPC數據 119

參考文獻

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指導教授

吳國暉(Kuo-Hui Wu)

審核日期

2023-8-15

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