标题: 有机蒙特纳石与聚胺基甲酸酯奈米复合材料发泡体之合成与物性
Synthesis and Characterization of Organo-montmorliionite/Polyurethane Nanocomposites Foam
作者: 邱丽娟
韦光华
材料科学与工程学系
关键字: 聚胺基甲酸酯发泡体;奈米复合材料
公开日期: 2000
摘要: 本论文为研究合成有机蒙特纳石/聚胺基甲酸酯奈米复合材料发泡体并分析其性质。以Tris(hydroxymethyl) aminomethane作为夹入剂改质蒙特纳石,制备得到3OH-Mont,以PU硬链节含量为50wt%的情况下,合成有机蒙特纳石/聚胺基甲酸酯发泡体奈米复合材料。
经由扫瞄式电子显微镜及密度分析结果可知,在蒙特纳石含量为0.1wt%、0.25wt%、0.5wt%、0.75wt%的聚胺基甲酸酯发泡体奈米复合材料中,其发泡形态、密度与纯聚胺基甲酸酯发泡体相同。
在热性质部分,由微差扫瞄式热分析仪(DSC)测试发现,各组成之软链节玻璃转移温度Tg(Soft)并无明显变化,耐热性质也因有机蒙特纳石的补强而趋于稳定,其中以组成为0.75wt%3OH-Mont之有机蒙特纳石/PU Nanocomposite Foam的改善效果最为明显(16℃)。
关于耐磨耗性之研究则发现,藉加入3OH-Mont所达到PU foam奈米复合材料硬度之提升,可有效增加其耐磨耗效率,最多可较纯PU foam降低1/2以下(8.37%VS.18.17%);此外亦以SEM观察磨耗表面形态,由PU foam奈米复合材料较光滑之磨耗表面再度验证上述之推论。
吸水性之测试,显示在有机蒙特纳石低于0.75wt%时,分布于有机蒙特纳石/聚胺基甲酸酯奈米复合材料发泡体中的矽酸盐层有阻隔水分的效率,因而使得吸水性降低;不过当组成为1wt%时的矽酸盐层吸水率大于阻隔率而使得吸水率上升。
Organo Montmorillonite nanocomposites foam have been synthesized,and their thermal and mechanical properties were investigated. Montmorillonite was first intercalated with Tris(hydroxymethyl) aminomethane (3OH) to form 3OH-Mont and then was dispersed in the polyurethane foam contaning 50%hard segment ratio.
It was found that the density and the foaming form of 3OH-Mont/PU foam Nanocomposites is close to that of pure PU foam at less than 1wt% 3OH-Mont content. The thermal degradation temperature, at 5%weight loss, of 0.75wt%3OH-Mont /PU foam Nanocomposites was 16℃higher than that of pure PU foam. More, the weight loss of 0.75wt%3OH-Mont / PU foam Nanocomposites was much smaller than that of pure PU foam in sbrasion test (8.37%VS. 18.17%), and the abraded surface of PU nanocomposites foam is smoother than that of pure PU foam.
When the amount of 3OH-Mont in PU foam reached 0.1wt%, a large decrease in water absorption was reached as compared to the of pure PU foam(2.35%VS. 2.68%)
URI: http://140.113.39.130/cdrfb3/record/nctu/#NT890159015
http://hdl.handle.net/11536/66638
显示于类别:Thesis