短玻璃纖維強化聚醯胺66複合材料機械性質 之研究

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洪稚鵬(Chee-Peng Ang) 查詢紙本館藏

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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

推文