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題名 | 四官能基環氧樹脂複合材料界相改質之研究 |
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作者 | 伍慶勳; 胡士仁; | 書刊名 | 逢甲學報 |
卷期 | 27 1994.11[民83.11] |
頁次 | 頁279-294 |
分類號 | 467.41 |
關鍵詞 | 四官能基; 界相改質; 複合材料; 環氧樹脂; |
語文 | 中文(Chinese) |
中文摘要 | 本研究的主要目的在利用間歇性或連續性的高分子界層改質碳纖維╱四官基環氧 樹脂複合材料的界面, 以改善複材的衝擊強度與層間剪強力。 利用電化學聚合反應技術將 polyacrylonitrile (PAN) 和 poyglycidyl acrylatel (PGA) 被覆在商用碳纖的表面, 界 層厚度由電流密度和通電時間加上控制。 以拔出試驗( pull out test )測量碳纖與樹脂 微滴間的界面剪強力(τ),樹脂微滴嵌在碳纖上的長度必須小於 60 μ m,否則碳纖在脫 鍵( debond )前即已斷裂,無法測得界面剪強力。 PGA 和 PAN 被覆的碳纖,其τ有些許 的增加。所有的被覆系統,無論間歇、連續或 PGA、PAN 被覆之積層板複合材料,其衝擊強 度與層間剪強力均同時增加。PAN 被覆者其層間剪強力隨複覆係數(C)增加而增加,但是 PGA 被覆者則隨被覆係數增加而逐漸下降。兩種被覆材料對衝擊強度的影響有相同的趨勢, 均隨C之增加而降低。由衝擊強度和層間剪強力的結果得知,間歇性被覆能增加複材的衝擊 強度, 若界層較柔軟時(如 PGA 被覆),間歇性被覆對複材層間剪強力的維持亦有很大的 貢獻。 |
英文摘要 | The primary concern of this paper is the modification of carbon fiber/ TGDDM epoxy composite interfaces by coating with intermittent or continuous polymeric interlayer to improve the impact strength and interlaminar shear strength (ILSS) or composites. Uniform interlayers of polyacrylonitrile and polyglycidyl acrylate were applied onto the surface of commercial carbon fibers by an electrochemical polymerization (ECP) technique. Thickness of the interlayer was controlled by the applied current density and time. Pull-out technique has been used to measure the interfacial shear strength (τ ) which between the single carbon fiber and the droplet of epoxy resin. The length of droplet must be less than 60 μ m to obtain the pull-out property, otherwise the fiber will rupture before debonding occurs. τ of the polyglycidyl acrylate and polyacrylnitrile coated fibers have little improvement when compared to that of controlled sample. All of the coated systems showed improvement both in impact strength and interlaminar shear strength. The interlaminar shear strength increases with increasing intermittent lengths (i.e. coating coefficient, C) in the polyacrylonitrile coating sample, whereas that in the polyglycidyl acrylate decreases with increasing intermittent lengths. Both systems give a similar impact strength which decrease with increasing C. Experimental results show that intermittent coating can effectively improve the impact strength of composites and maintain the ILSS value when the polymeric interlayer is ductile in property (such as PGA coating series). |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。