以乳化聚合技術製備聚甲基丙烯酸甲酯/蒙脫土奈米複合材料與其性質研究

Synthesis and Properties of Poly(methyl methacrylate)/Montmorillonite Nanocomposite Materials Prepared by Emulsion Polymerization Technique

黃政育(Cheng-Yu Huang)

指導教授 ： 葉瑞銘

中原大學/理學院/化學研究所/碩士(2003年)

https://doi.org/10.6840/cycu200300390

摘要

在此論文中，我們以乳化聚合的方式合成了一系列的壓克力 ( PMMA) /黏土(Clay)奈米複合材料。在本研究中首先以親油化改質過的蒙脫土與壓克力單體進行乳化聚合反應，製備出一系列不同比例的PMMA/Clay奈米複合材料，所得的產物並以TEM、FTIR與XRD來進行分析鑑定；並利用GPC與UV來量測並評估奈米複合材料中的有機高分子聚合物的分子量大小及透明度，並進一步將此材料製成自由立膜再以GPA、VPA儀器量測其氣體穿透率及水氣穿透率；再以電化學方法量測此材料的金屬防腐蝕性質；並使用TGA與DSC來評估其熱性質。

關鍵字

乳化聚合 ； 聚丙基丙烯酸甲酯 ； 蒙脫土 ； 奈米

並列摘要

A series of polymer-clay nanocomposite (PCN) materials that consisted of poly(methyl methacrylate) (PMMA) and layered montmorillonite (MMT) clay were prepared by effectively dispersing the inorganic nanolayers of MMT clay in organic PMMA matrix via an emulsion polymerization. Organic MMA monomers were first intercalated into the interlayer regions of organophilic clay hosts and followed by a convertional emulsion polymerization. The as-synthesized PCN materials were characterized by infrared spectroscopy (IR), wide-angle powder X-ray diffraction (XRD) and transmission electron microscopy (TEM). PCN coatings with low clay loading (e.g., 1wt-%) on cold-rolled steel (CRS) were found much superior in anticorrosion over those of PMMA based on a series of electrochemical measurements of corrosion potential, polarization resistance, corrosion current and Impedance spectroscopy in 3.5 wt% aqueous NaCl electrolyte. The molecular weights of PMMA extracted from PCN materials and PMMA were determined by gel permeation chromatography (GPC) . Effects of the material composition on the gas barrier propertity,optical clarity and thermal stability of PMMA along with PCN materials, in the form of both free-standing film and fine powder, were also studied by molecular permeability analysis,UV-visible transmission spectroscopy,differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), respectively.

並列關鍵字

emulsion ； nanocomposites ； Montmorillonite ； PMMA

參考文獻

62.劉時州碩士論文，聚苯胺/黏土奈米複合材料之合成與性質研究，p19，2001。

3.H. Gleiter, Progree in Mater. Sci. 33, 223，1989。

11.Gussman,S.; Paint Teachnol,27.1,17.1963。

40.GB patent 1,011,041.

61. Akelah, A., Moet, A., J. Mater. Sci.31, 3589-3596.1996。