臺灣博碩士論文加值系統

本研究旨在利用國內已生產或使用之塑膠材料(如PBT、PP、PC等工程塑膠)，加入以抄紙機自製之纖維紗蓆以熱壓成型之方法製成纖維補強之高性能強化塑膠之複合材料，探討最佳加工技術、條件；以及加工過程中樹脂之流變性質；補強纖維之分佈情形。
本研究目標為：
1.探討抄紙機製作纖維紗蓆之加工變數對材料性質的影響，其加工變數包括漿料濃度、散漿游離度、纖維長度和壓力等。
2.將自製之纖維紗蓆與PC、PBT、PP等film層疊，以製作熱壓成型複合材料，並探討熱壓成型加工條件對材料性質的影響。
3.探討纖維種類、纖維長度、表面處理、纖維分佈均勻度對材料性質之影響。
由實驗結果得之製作纖維蓆之最佳配方分散劑水為1000ml；分散劑(Polyacrylamide，PAM)為0.5ml；纖維切股為5g。利用抄紙機製作纖維紗蓆之最佳條件是攪拌速率為90rpm與攪拌時間為60~120sec；去水壓力為35psi。製作纖維蓆/(PP、PC、PBT)積層板之最佳加工條件是預熱時間為3min；料熱壓時間為30sec；材料熱壓壓力為500psi；材料熱壓溫度為PP＝173℃、PC＝183℃、PBT＝245℃。纖維含量高時，樹脂含量相對的降低，則纖維含浸較差。若纖維含量太低時，雖然纖維含浸較佳，但是機械性質會明顯下降。本實驗纖維重量百分率約在21﹪左右。積層板之各向機械性直接隨Rotational time增加(即纖維長度減短)而降低。碳纖維含量愈高時，則積層板之抗折強度、抗折模數、抗張強度、抗張模數、動態儲存模數E'與Tan δ peak愈高，其耐衝擊強度愈低。由積層板之破壞面圖中明顯看出經抗張試驗後，以SEM觀察其破壞面之情形。從破壞後樹脂仍附著於纖維表面的量可以看出，纖維和數之間含浸效果良好。

謝誌 III
摘要 IV
表目錄 VI
圖目錄 VII
一、緒論 1
二、文獻回顧 4
不連續纖維強化複合材料之疲勞性質 4
三、實驗部份 6
3-1實驗流程圖 6
3-2實驗藥品與材料 7
3-3實驗儀器 8
3-4纖維之特性 11
3-5實驗方法 16
3-6測試方法 20
四、結果與討論 25
4-1纖維氈之製作 25
4-2積層板熱壓加工條件 27
4-3纖維含量對積層板性質的影響 30
4-4纖維長度對積層板性質的影響 30
4-5 混成纖維含量對積板性質的影響 32
4-6塑膠薄膜對積層板性質的影響 33
4-7形態學(Morphology) 34
五、結論 119
六、參考文獻 122

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