- 學位論文
射出成型聚碳酸酯添加碳纖維及奈米碳管複合材料之表面電阻研究
Study on the Surface Conductivity of Polycarbonate Added with Carbon Fiber and Carbon Nanotube
摘要
由於電腦科技的發達，如積體電路(IC)製造業、電子構裝業及塑膠產品製造業等皆隨之蓬勃發展，需求量與日俱增；目前在電子工業中，大量的塑膠製品被使用，由於塑膠為絕緣體，易累積靜電荷產生靜電放電(Electrostatic Discharge, ESD)，在超小型的電子零件中，也會因20伏特程度之低 ESD而受到破壞，因此在製造、裝配及輸送過程中，如何使盛裝電子零件的塑膠製品導電化，減少ESD對敏感的電子零件產生損壞，是市場迫切需求的。近年來碳纖維與奈米碳管已成為熱門複合材料，對於塑件的機械性質補強提昇有著相當大的功效，以及有效降低成本將會是重要的課題。 本研究為探討射出製程技術對PC複合材料產品性質的影響，利用射出成型機成型PC、PC+CF 、PC+CNT三種塑料，分別在熔膠溫度、模具溫度、射出速度，交叉組配後共15種不同的成型條件。並且利用美國材料與試驗協會(ASTM)標準進行拉伸強度試驗，並記錄其結果，從研究結果發現，成型條件對於拉伸強度有直接的影響，模具溫度與射出速度對於表面電阻值的影響最為顯著。隨著模具溫度與射出速度的增加，表面電阻值也會相對提高。而在熔膠溫度對於拉伸強度方面，拉伸強度則會隨著熔膠溫度升高而升高。 原料成本方面，添加奈米碳管複合材料，表面電阻值未因成型條件的變動有所失效。由於奈米碳管含量比例較碳纖維含量比例少，原料成本也相對大幅減少。
關鍵字
靜電放電；碳纖維；奈米碳管並列摘要
In order to investigate the influence of injection process technology on the properties of PC composite products, three kinds of plastics such as PC, PC+CF and PC+CNT were formed by injection molding machine, which were respectively in the melting temperature, mold temperature and injection speed. 15 different molding conditions. And the tensile strength test was carried out by the American Society for Testing and Materials (ASTM) standards, and the results were recorded. From the research results, it was found that the molding conditions had a direct influence on the tensile strength, and the mold temperature and the injection speed had the most influence on the surface resistance value. Significant. As the mold temperature and the injection speed increase, the surface resistance value also increases relatively. In terms of the melt temperature, the tensile strength increases as the temperature of the melt increases. In terms of raw material cost, the addition of the carbon nanotube composite material did not invalidate the surface resistance value due to variations in molding conditions. Since the proportion of carbon nanotubes is lower than that of carbon fiber, the cost of raw materials is also relatively reduced.