The Influence of Epitaxial Crystallization on the Mechanical Properties of Polyamide 66/Reduced Graphene Oxide Nanocomposite Injection Bar
The Influence of Epitaxial Crystallization on the Mechanical Properties of Polyamide 66/Reduced Graphene Oxide Nanocomposite Injection Bar
复制标题
外延结晶对聚酰胺66/还原氧化石墨烯纳米复合注射棒力学性能的影响
DOI：
10.3390/cryst7120384
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发表时间：
2017-12-01
期刊：
影响因子：
2.7
通讯作者：
Wang, Zongbao
中科院分区：
文献类型：
--
作者：
Chi, Enyi;An, Minfang;Wang, Zongbao
选择聚酰胺66（PA 66）作为亲水性聚合物的代表，以研究外延晶体在半结晶聚合物/还原氧化石墨烯纳米复合材料注塑条中的影响。采用差示扫描量热仪、二维广角X射线衍射技术和二维小角X射线散射技术研究了PA 66/RGO纳米复合材料的结晶行为。结果表明，RGO是PA 66的有效成核剂。RGO的存在可以提高PA 66的结晶取向度，但对PA 66的结晶结构没有影响。PA 66/RGO纳米复合材料中存在非外延晶体和外延晶体。外延晶体的尺寸远大于非外延晶体的尺寸。拉伸测试结果表明，存在较少的外延晶体可以提高聚合物的力学性能。
Polyamide 66 (PA66) was chosen as the representative of hydrophilic polymers, to investigate the influence of epitaxial crystals in semi-crystalline polymers/reduced graphene oxide nanocomposite injection-molding bars. A differential scanning calorimeter was used, and the two-dimensional wide-angle X-ray diffraction technique, as well as the two-dimensional small angle X-ray scattering technique, were used to research the crystallization behavior in PA66/RGO nanocomposites. The results indicated that RGO was an effective nucleation agent for PA66. The presence of RGO could enhance the orientation degree of the PA66 crystals and did not influence the crystal structure of the PA66. The non-epitaxial crystals and the epitaxial crystals existed in PA66/RGO nanocomposites. The size of epitaxial crystals was much greater than that of the non-epitaxial crystals. Tensile test results showed that the presence of fewer epitaxial crystals can improve the mechanical properties of a polymer.