Preparation and characterization of polyether-block-amide copolymer/clay nanocomposites
Preparation and characterization of polyether-block-amide copolymer/clay nanocomposites
复制标题
聚醚嵌段酰胺共聚物/粘土纳米复合材料的制备及表征
DOI：
10.1002/pen.20670
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发表时间：
2007
影响因子：
3.2
通讯作者：
P. Tsai
中科院分区：
文献类型：
--
作者：
I. Yang;P. Tsai
采用熔融共混法成功地将聚醚-嵌段-酰胺共聚物与8种有机粘土和1种钠基蒙脱土共混制得纳米复合材料。用X射线衍射仪、热重分析仪、差示扫描量热仪、动态力学分析、拉伸试验和线粘弹性分析对杂化产物进行了表征。发现有机粘土中表面活性剂的分子结构对粘土的粘弹性和d间距增益有显著影响。与有机粘土相比，使用单一长烷基尾部表面活性剂的有机粘土杂化产物具有更高的d间距增益。研究发现，熔体粘弹性与d间距增益有很好的相关性，因此线性粘弹性可以作为复合材料中片层组织的良好指标。熔体的粘弹性与软段和硬段的拉伸模数和玻璃化转变温度有较好的相关性，这表明血小板的机构性在这些性能中起着作用。熔点、热降解温度、断裂伸长率和拉伸强度等性能与粘弹性无关。失败表明这些性质与血小板组织无关或受其影响较小。波兰姆。英语。科学，47：235-243,2007。©2007塑料工程师学会。
A polyether-block-amide copolymer was successfully blended with eight organoclays and one sodium montmorillonite by melt processing technique to form nanocomposites. X-ray diffraction, thermogravimetry, differential scanning calorimeter analysis, dynamic mechanical analysis, tensile test, and linear viscoelastic analysis were used to characterize the hybrids. The molecular structure of the surfactants in the organoclays was found having a significant impact on the viscoelasticity and the d-spacing gain of the clays. Hybrids from organoclays using surfactants with a single long alkyl tail had a higher d-spacing gain than those from organoclays using surfactants with two long alkyl tails. The melt viscoelasticity was found excellently correlated to the d-spacing gain and hence the linear viscoelasticity could be an excellent indicator for platelet organization in the composites. The melt viscoelasticity is fairly correlated to the tensile modulus and glass transition temperature of the soft and hard segment, implying that the platelet organization plays a role in these properties. Properties such as melting point, thermal degradation temperature, elongation at break, and tensile strength are not correlated to the viscoelasticity. The failure indicates that these properties are irrelevant to or less influenced by the platelet organization. POLYM. ENG. SCI., 47:235–243, 2007. © 2007 Society of Plastics Engineers.