臺灣博碩士論文加值系統

熱塑性聚胺酯彈性體 (thermoplastic polyurethane elastomer, TPU) 具有優良的耐磨耗性、彈性佳、耐撕裂性、抗油性等特性，本研究旨在探討不同比例之1,4-丁二醇 (1,4-BD) 和bisphenol A ethoxylate混合成的鏈延長劑，與聚酯二元醇(polyester polyol)、diphenylmethane-4,4-diisocyanate (MDI)，以一次進料法 (one-shot process) 進行TPU的合成；經過不同的後熟階段 (curing)，再分析其熱性質與黏度變化，探討配方與 TPU 性質的相關性。經由UV觀察，高溫加工時間與黃化現象有成正成長趨勢，而TPU含bisphenol A ethoxylate越高在高溫處理後易造成黃化現象；TPU在長時間真空受熱下，其黏度有先降後升的現象產生，實驗結果顯示添加較多之bisphenol A ethoxylate可降低TPU黏度衰退率，同時經長時間後熟其黏度成長率亦較高。由DSC分析，bisphenol A ethoxylate 有助於TPU之Tm提昇，本研究最佳效果可提高其Tm達80℃；經TGA分析發現bisphenol A ethoxylate之添加可明顯增加其第二裂解溫度。

Thermoplastic polyurethane elastomers (TPU) possess several excellent properties such as abrasion-resistance, elasticity, tear strength and oil-resistance. The synthesis of thermoplastic polyurethane was carried out by a one-shot process using polyester polyol, diphenyl-methane-4, 4-diisocyanate (MDI), and two chain extenders. 1,4-Butanediol and bisphenol A ethoxylate were used as the 1st and the 2nd chain extenders, respectively. From their viscosities and thermal properties data, we found that TPUs with a higher proportion of the 2nd chain extender show better thermal and molecular weight stabilities. Interestingly, the TPU with a higher proportion of the 2nd chain extender also shows more yellowish in color by comparing the appearance of TPUs after treated at a high temperature. DSC and TGA analysis also exhibited higher soften point and second degradation temperature of TPUs due to bisphenol A ethoxylate added.

第一章 緒論 1
第二章 文獻回顧 5
2-1 緒言 5
2-2 TPU沿革 9
2-3 TPU材料簡介 12
2-4 TPU結構 15
2-5 TPU特性 19
2-6 TPU材料的應用 26
2-7 TPU市場概況 31
第三章 研究方法 38
3-1 研究動機 38
3-2 研究方向 39
3-3 藥品介紹 40
3-4 聚多元醇分子量分析 43
3-5 MDI純度分析 53
3-6 製程方法 61
3-7 實驗方法介紹 65
3-8 反應槽簡介 74
3-9 反應步驟 76
3-10 TPU性質分析 78
第四章 結果與討論 81
4-1 TPU之合成 81
4-2 TPU成品之熟成 84
4-3 成品色澤判定 84
4-4 密度測定 85
4-5 相對黏度(R.V.) 85
4-6 紫外光分光光譜儀(UV) 91
4-7 微差掃描熱卡計(DSC)分析 101
4-8 熱重量分析儀(TGA)分析 107
第五章 結論與未來展望 113
5-1 結論 113
5-2 未來展望與建議 115
參考文獻 116
附錄一 DSC第一次升溫曲線 120
附錄二 DSC降溫曲線 123
附錄三 DSC第二次升溫曲線 126
附錄四 TGA分析圖 129

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