Microstructure, thermomechanical properties, and electrical conductivity of carbon black-filled nylon-12 nanocomposites prepared by selective laser sintering
Microstructure, thermomechanical properties, and electrical conductivity of carbon black-filled nylon-12 nanocomposites prepared by selective laser sintering
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DOI：
10.1002/pen.22037
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发表时间：
2012-01-01
影响因子：
3.2
通讯作者：
Das, Suman
中科院分区：
文献类型：
--
作者：
Athreya, Siddharth Ram;Kalaitzidou, Kyriaki;Das, Suman
采用选择性激光烧结（SLS）来制造包含炭黑（CB）增强的尼龙12的多功能聚合物纳米复合材料，其负载量为4%（重量）。将这种纳米复合材料的热变形温度 (HDT)、粘弹性和电导率与通过挤出注射成型 (Ex-IM) 获得的材料进行比较。发现两种方法制备的纳米复合材料的 HDT 几乎相同。通过 SLS 制备的纳米复合材料的电导率比通过 Ex-IM 制备的纳米复合材料的电导率高出五个数量级。对于所有测试频率，SLS 处理的纳米复合材料的储能模量比 Ex-IM 制备的纳米复合材料的储能模量至少高一个数量级。使用 X 射线衍射、差示扫描量热法和扫描电子显微镜研究了观察到的性能差异以及加工方法对聚合物分子量、结晶特性以及 CB 在聚合物基体中的分散的影响。聚合物。 ENG。 SCI., 2012. (C) 2011 塑料工程师学会
Selective laser sintering (SLS) is employed to fabricate a multifunctional polymer nanocomposite comprising Nylon-12 reinforced with carbon black (CB) at a loading of 4% by weight. The heat distortion temperature (HDT), viscoelastic properties, and the electrical conductivity of this nanocomposite are compared to those obtained via extrusion injection molding (Ex-IM). The HDT of the nanocomposites made by the two methods are found to be nearly identical. The electrical conductivity of the nanocomposite made by SLS is five orders of magnitude higher than that obtained through Ex-IM. The storage modulus of the SLS-processed nanocomposite is at least one order of magnitude higher than that of the nanocomposite made by Ex-IM, for all the frequencies tested. The observed differences in properties and the effects of the processing methods on the polymer's molecular weight, its crystallization characteristics, and the dispersion of CB within the polymer matrix are investigated using X-ray diffraction, differential scanning calorimetry, and scanning electron microscopy. POLYM. ENG. SCI., 2012. (C) 2011 Society of Plastics Engineers