本研究主要是以高分子材料聚甲基丙烯酸甲酯(PMMA)/蒙脫土 (Montmorillonite, MMT)的奈米複合材料之機械性質。以聚甲基丙烯酸甲酯為基材,加入改質之蒙脫土,經由塑譜儀混煉後再熱壓的方式製備成奈米複合材料之試片,藉此來探討機械性質(拉伸、彎曲、衝擊、硬度、磨耗)之變化。並以X光繞射儀、掃描式電子顯微鏡(SEM)、穿透式電子顯微鏡(TEM)來進行鑑定。 結果顯示,在拉伸、彎曲試驗中1 wt%有最好的增強效果,分別提升1.81%、13.94%;在衝擊試驗中1 wt%有最好的增強效果,提升1.81%;硬度及磨耗試驗中3 wt%有最好的增強效果,分別提升14.07%、58.14%。而在TEM測試方面,則可驗證蒙脫土的分散型態,並與XRD試驗做比對。熱性質方面,在熱示差分析得知,其熔點溫度在添加蒙脫土1%時上升最多,由65.04上升至108.82,提升43.78℃。在熱重分析得知,其裂解溫度在添加蒙脫土5%最佳,由358.34上升至374.66,提升了16.32℃。
This experiment uses a plastograph-mixer with the twin-screw mixed method to obtain standard shaped specimens of Polymer-Clay Nanocomposites (PCN), used in the preparation of PMMA/MMT nanocomposites. Using the processes of wide-angle powder X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM), the chemical structure and polymer morphology of these as-synthesized PCN specimens was characterized. In addition, we made these experiment materials in order to probe into its mechanical properties. The tests used are: layer distance of PCN, tensile, flexural, impact, Vickers-hardness and wearing tests. After the experiment, In the tensile and flexural test, the MMT weight percentage 1wt% has the best result; it increased by 1.81% and 13.94%. In the impact test, the MMT 1wt% strengthened 1.81%. In the hardness test, the MMT 3wt% decreased the effect by 14.07% and 58.14%.