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研究生： 陳柏宏
Bo-Hung Chen
論文名稱： 完全相分離PU之完整形態研究
指導教授： 陳登科
Teng-Ko Chen
口試委員:
學位類別： 碩士
Master
系所名稱： 工學院 - 化學工程與材料工程學系
Department of Chemical & Materials Engineering
畢業學年度： 88
語文別： 中文
論文頁數： 100
中文關鍵詞： 超薄切片 、形態 、相分離
外文關鍵詞： ultramicrotomy, morphology, polyurethane
相關次數： 點閱：5  下載：2 
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    • 嵌段式聚氨基甲酸酯(Segmented polyurethane，PU)龐大的化學結構數目以及內部特殊的微相形態，反應出多變的性質；但同時也複雜化了PU形態、結構和性質關係。對此，文獻上一直都沒有肯定的結果，甚至出現許多矛盾。本實驗利用之前本實驗室所合成完全相分離，且含不同軟質段分子量及硬質段含量的PU，將樣本利用鑽石刀超薄切片製成相當薄的薄膜後，藉由Transmission Electron Microscopy (TEM)來觀察PU廣泛的形態變化。在不考慮溶劑效應及軟質段分子鏈太短的影響下，硬質段含量低時，硬質段會形成短圓柱狀(short cylinder)的形態分散在軟質相中，而隨著硬質的逐漸增加，硬質段會先形成較長的圓柱狀(cylinder)，然後再逐漸包圍住軟質相而相轉變形成連續相。然而在短軟質段分子鏈的限制下，低硬質段含量時，硬質段一直會以domain相當小的條狀(stripe)分散在軟質相中，隨著軟質段分子鏈增長，對硬質段移動的限制減輕後，才會聚集成domain較大的圓柱狀(cylinder)，然後再逐漸包圍住軟質相形成連續相。在軟質段分子量為4200時，其硬質段的折返上限為4個MDI-BD units，然而在軟質段分子量在2300以下時，其硬質段的折返上限只有3個MDI-BD units，一旦硬質段的MDI-BD units超過此上限就會形成折返(folded)。

    摘要………….………………………………………………………..Ⅲ 圖目錄 ….……………………………………………………………Ⅳ 表目錄……………………………………………………………….. Ⅶ 第一章 緒論…………………………………………………….. 1 第二章 文獻回顧………………………………………………… 3 2-1相分離程度或相組成比率的計算………………………. 4 2-2 PU 相分離動力學………………………………………… 7 2-3 PU 的形態與結構…………………………………………. 9 2-4 硬質段的結構組成………………………………………… 11 第三章 實驗 3-1 化學藥品…………………………………………………..16 3-2 儀器設備…………………………………………………..16 3-3 實驗流程…………………………………………………..17 第四章 結果與討論 4-1 相分離之評鑑………………………………………………. 22 4-2 穿透式電子顯微鏡(TEM)對HTPB-PU形態分析…………. 24 4-2-1輻射損傷(radiation damage)對形態的影響………. 25 4-2-2 PU硬質相形態變化……………………………………. 26 4-2-2-1 HTPB-PU 1000系列不同硬質段含量的形態變化 4-2-2-2 HTPB-PU 1650系列不同硬質段含量的形態變化 4-2-2-3 HTPB-PU 2300系列不同硬質段含量的形態變化 4-2-2-4 HTPB-PU 4200系列不同硬質段含量的形態變化 第五章 結論……………………………………………………… 91 參考文獻………………………………………………………

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