- 學位論文
運用田口品質工程探討中間相瀝青製程參數
Implementation of Taguchi Method to the process of mesophase
摘要
本研究之目的在於運用田口品質工程進行實驗設計與規劃以探討中間相瀝青製程相關因子。依據「液相碳化」法中的物理及化學變化，選定「元素分析」、「X光繞射分析」、「紅外線光譜分析」、「重量損失」、「密度」、「軟化點」及「光學組織」品質特性。設定實驗因子及水準：「升溫速度」（3℃/min、4℃/min、5℃/min）、「熱處理溫度」（350℃、400℃、450℃）、「熱處理時間」（4hr、8hr、16hr）、「氣氛」（氮氣壓、氮氣流、真空）並選擇 L9(34)直交表進行實驗配置。 本研究第一階段實驗後，各項品質特性之最佳製程參數彼此衝突，綜合分析個別品質特性的反應值，No.9實驗組合為最適條件。經過5次確認實驗後，在定量分析（「元素分析」、「X光繞射分析」、「重量損失分析」、「密度分析」、「軟化點分析」）中，其反應值均介於第一階段實驗3個標準差內，証明其具有再現性。 在定性分析中，「光學組織」顯示液相碳化反應的歷程均已達到形成中間相瀝青的階段，其結果証明其具有再現性。「紅外線光譜分析」中發現確認實驗No.2有較低的芳香族官能基含量。重新檢視確認實驗No.2定量分析的結果，顯示其有較低的「疊層厚度」、「密度」、「軟化點」並有較高的「H/C比」、「重量損失」，其結果顯示液相碳化的程度相對不足。 綜合上述，No.9實驗組合（升溫速度：5℃/min、熱處理溫度：450℃、熱處理時間：8hr、氣氛：氮氣壓）為中間相瀝青最佳製程參數。
並列摘要
The aim of this thesis is to implement the Taguchi Method to design the experiment for analysis of correlative factor of the mesophase pitch process. According to the physical and chemical changes of the liquid carbonization methods, elemental Analysis, X-ray diffraction, FT-IR Analysis, weight loss, density, soft point and optic organization are considered as quality characteristics. The experimental factors and levels are designed, as follows: speed of the temperature raise（3℃/min,4℃/min,5℃/min）, temperature of the heat treatment（350℃、400℃、450℃）, time of the heat treatment（4hr、8hr、16hr）and atmosphere（pressurized ,fluid , vacuum）. A L9(34) design is used. The first stage of experiment shows that the best parameter combination of various quality characteristics contradicted with each other. After investigating the response of individual quality characteristics, No.9 experiment combination turns out to be the best condition. The responses of quantitative analysis（elemental Analysis, X-ray diffraction, weight loss, density, soft point）all between 3 sigma improved the reproducibility after 5 repetition experiments. In qualitative analysis, optic organization shows liquid carbonization progressed in mesophase stage. The result improves the reproducibility. In FT-IR Analysis, confirmation experiments No.2 has low aromatic functional group. Reexamined the quantitative analysis of confirmation experiments No.2 , it has lower elemental Analysis, X-ray diffraction, density, soft point and higher weight loss. The result reveals that confirmation experiments No.2’s liquid carbonization was insufficient. In conclusion, No.9 experiment combinations is the best parameter of mesophase pitch process in our study.