聚四氟乙烯/石墨與聚四氟乙烯/玻璃纖維複合材料之製備與機械、熱性質之研究

本研究是利用熔融插層法的混煉方法，使用改質聚四氟乙烯作為基材，分別添加25%石墨與15%玻璃纖維 + 5%二硫化鉬作為增強材。經由塑譜儀混煉後再熱壓的方式，分別製備出聚四氟乙烯之高分子複材(PCN)試片，進行研究機械性質(拉伸、衝擊與磨耗試驗)與熱性質(微分掃瞄量熱分析DSC、熱重分析TGA)，再經由掃描式電子顯微鏡(SEM)觀察衝擊破斷面，以決定出最佳化處理配方與加工參數。研究結果發現在聚四氟乙烯奈米複材中，添加石墨與玻璃纖維有助於改善基材性質，但是衝擊強度卻隨著抗拉強度增加而下降。

關鍵字

聚四氟乙烯；石墨；玻璃纖維；微分掃瞄量熱分析

並列摘要

This study was conducted using melt intercalation method mixing method using modified polytetrafluoroethylene as a substrate, were added 25% graphite and 15% glass fiber & 5% molybdenum disulfide (MoS2) as a reinforced material. Then mixed by plastograph-mixer manner were prepared, the polymer composite of polytetrafluoroethylene (PCN) test pieces were studied mechanical properties (tensile, impact and wearing tests) and thermal properties (DSC, TGA), and then through the scanning electron microscope (SEM) observed the impact fracture surface to determine the best treatment formulation and processing parameters. The results showed that the Teflon nanocomposites, add graphite and glass fiber helps to improve the nature of the substrate, but the impact strength was decreased with the increase of tensile strength.