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姓名 洪稚鵬(Chee-Peng Ang)  查詢紙本館藏   畢業系所 機械工程學系
論文名稱 短玻璃纖維強化聚醯胺66複合材料機械性質 之研究
(The Study of Mechanical Properties in Short Glass Fiber Reinforced Polyamid 66 Composites)
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摘要(中) 聚醯胺66 (Nylon 66,尼龍66)隨著玻璃纖維強化後,其機械性質與物理特性大幅提升,新的用途正在不斷的被開發中。本研究將運用三種不同重量百分率之短玻璃纖維強化Nylon 66 (0 wt.%、13 wt.%和33 wt.%),利用射出成型加工方法及傳統實驗設計法,探討保壓壓力、融膠溫度、充填時間與模具溫度等四個參數對於Nylon 66複合材料機械性質之影響的研究,並評估出理想的射出成型製程條件。實驗項目包括準靜態拉伸、高應變拉伸及破壞韌性等三項。主要研究結果如下:
於準靜態拉伸實驗中發現,對於未強化Nylon 66 及Nylon 66 / GF複合材料,當融膠流動方向平行於受力方向,則該試片之抗拉強度、楊氏模數及伸長率等機械性質,均優於融膠流動方向平行於受力方向之試片,而Nylon 66 / 13 wt.%GF具有最小的伸長率。未強化Nylon 66最佳射出成型參數為:融膠溫度265℃、模具溫度105℃、充填時間2.5 s及保壓壓力42 MPa。Nylon 66 / GF最佳射出成型參數為:融膠溫度290℃、模具溫度60℃、充填時間2.5 s及保壓壓力42 MPa。
於高應變拉伸實驗中發現,未強化Nylon 66 及Nylon 66 / GF複合材料的抗拉強度隨應變速率的增加而上升。同時,並發現未強化Nylon 66的伸長率隨拉伸速率的增加而下降,而Nylon 66 / GF在則是隨拉伸速率的增加而上升。各射出成型參數整體趨勢相似於準靜態拉伸性質。
本研究兩種Nylon 66 / GF複合材料在厚度3.6 mm時,即可求得平面應變破壞韌性。未強化Nylon 66因基地為高延性及韌性的材質,所以具有良好的破壞韌性,與Nylon 66 / 33 wt.%GF的破壞韌性相近,而Nylon 66 / 13 wt.%GF的破壞韌性則明顯較低, Nylon 66 / GF最佳射出成型參數為:融膠溫度於275℃、模具溫度75℃、充填時間0.5 s及保壓壓力34 MPa。
關鍵字(中) ★ 尼龍 66
★ 短玻璃纖維
★ 聚醯胺 66
關鍵字(英) ★ Nylon 66
★ Short Glass Fiber
★ PA 66
論文目次 摘要 I
誌謝 III
總目錄 IV
圖目錄 VI
表目錄 X
符號說明 XI
第一章 前言 1
1-1 研究動機與目的 1
1-2 論文架構 3
第二章 文獻回顧與理論說明 5
2-1 Nylon 66複合材料之應用與研究 5
2-2 塑膠複合材料的破壞行為 11
第三章 實驗方法與步驟 14
3-1 實驗材料與試片準備 14
3-2 成型條件範圍之擬定 15
3-3 模具設計 18
3-4 準靜態拉伸試驗方法 19
3-5 高應變率拉伸試驗方法 20
3-6 破壞韌性試驗方法 20
第四章 實驗結果與討論 23
4-1 纖維排向觀察 23
4-2 準靜態拉伸性質 24
4-3 高應變率拉伸性質 31
4-4 破壞韌性 34
第五章 結論與未來發展方向 38
5-1 結論 38
5-2 未來發展方向 40
參考文獻 43
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指導教授 黃俊仁(Jiun-Ren Hwang) 審核日期 2004-7-16
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