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博碩士論文 etd-1220112-141329 詳細資訊
Title page for etd-1220112-141329
論文名稱
Title
推進劑中硝酸酯塑化聚醚黏合劑之製備與檢測
Preparation and Characterization of Nitrate Ester Plasticized Polyether for Propellant Binder
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
67
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2012-07-23
繳交日期
Date of Submission
2012-12-20
關鍵字
Keywords
拉力試驗、聚氨酯、黏合劑、NEPE推進劑
NEPE, binder, polyurethane, tensile test
統計
Statistics
本論文已被瀏覽 5733 次,被下載 1239
The thesis/dissertation has been browsed 5733 times, has been downloaded 1239 times.
中文摘要
此研究計畫使用聚乙二醇polyethylene glycol (PEG),搭配醋酸丁酸纖維素cellulose acetate butyrate (CAB),兩者與硬化劑[Desmodur N100 (N100) 或Desmodur N3200 (N3200)]在催化劑dibutyltin dilaurate (DBTDL)輔助下反應形成聚氨酯,並以三醋酸甘油酯triacetin (TA)做為塑化劑。藉由調整-NCO/-OH官能基數量比、塑化劑與預聚物間的重量比例、PEG的分子量、催化劑劑量以及改變在合成混料時添加催化劑與硬化劑的順序和反應攪拌的時間,觀察上述變數對聚氨酯的物性造成的影響。在分析方面,以傅立葉霍氏轉換紅外光譜儀觀察反應進行的程度、以熱重分析儀觀察熱穩定性、以微差掃描卡儀觀察熱性質,再以拉伸試驗與溶脹試驗測試其機械性質。從各分析的結果顯示,-NCO/-OH的比例在1.2到1.4之間其機械性質較佳,迅速降溫時結晶最少;TA與PEG的重量比大於2以上時,聚氨酯在拉伸時以及迅速降溫時結晶最少。研究結果同時也顯示,PEG分子量為4000時機械性質最好;催化劑量則以使混料時有足夠時間混合均勻為主。在合成混料時,需先加入催化劑攪拌均勻後再加入硬化劑,且在能除掉氣泡的前提下,攪拌時間愈長,則聚氨酯在機械性質、迅速降溫時抵抗結晶以及性質均一性上能夠愈好。
Abstract
Polyurethane network binders were synthesized using polyethylene glycol (PEG) prepolymers, cellulose acetate butyrate (CAB), curative [Desmodur N100 (N100) or Desmodur N3200 (N3200)], and catalyst [dibutyltin dilaurate (DBTDL)]. Triacetin (TA) was added as plasticizer before the reaction. Polyurethanes were prepared by varying the molar ratio of –NCO/-OH, weight ratio of TA/PEG, molecular weight of PEG, the amount of catalyst, the order of adding catalyst and curative, and the stirred time. Synthesized polyurethanes were characterized by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), tensile tests, and swelling tests to study their reaction, degradation, thermal, and mechanical properties. When the ratio of –NCO/-OH was between 1.2 and 1.4, polyurethane gave the best mechanical properties. Additionally, the quenched polyurethane had a lower degree of crystallinity When the weight ratio of TA and PEG was bigger than 2, crystallization of polyurethane could be minimized during the tensile testing or after quenching. In this study, it was found that PEG with molecular weight of 4000 yielded the best mechanical properties. These results indicate that better and uniform mechanical properties can be obtained by using enough stirring time via varying the amount of catalyst and adding catalyst before curing agent.
目次 Table of Contents
摘要 I
Abstract II
目錄 III
表目錄 V
圖目錄 VII
第一章 前言 1
1-1 NEPE (Nitrate Ester Plasticized Polyether) 推進劑 1
1-2 聚氨酯PU (polyurethane) 2
第二章 文獻回顧 3
2-1影響NEPE推進劑機械性質的因素 3
2-1-1 醇類預聚物的影響 4
2-1-2 交聯劑的影響 4
2-1-3 硬化劑的影響 4
2-1-4 -NCO/-OH官能基數量比的影響 5
2-1-5 塑化劑的影響 6
2-2 溶脹性質測試原理 6
2-3 研究目標與方法 7
第三章 實驗 8
3-1 藥品 8
3-2 檢測儀器 10
3-3 驅除原料水氣方法 10
3-4 黏合劑聚氨酯合成及試片命名-N100系統 10
3-5黏合劑聚氨酯合成及試片命名規則-硬化劑先加之N3200系統 11
3-6黏合劑聚氨酯合成及試片命名規則-硬化劑後加之N3200系統 11
3-7黏合劑聚氨酯合成及試片命名-催化劑減量系統 12
3-8檢測方法 12
第四章 結果與討論 14
4-1 N100系統 15
4-2硬化劑先加之N3200系統 16
4-3硬化劑後加之N3200系統 18
4-4催化劑減量系統 20
第五章 結論 24
第六章 參考文獻 26
參考文獻 References
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