纳米ZnO对MC尼龙结构和性能的影响

采用原位聚合反应制备了纳米ZnO/MC尼龙6复合材料。对所制备的复合材料进行力学性能、 形貌、 结构检测及DSC、 XRD分析, 结果表明: 复合材料中的ZnO粒径小于100nm, 分布均匀; 纳米ZnO/MC尼龙6复合材料拉伸强度比纯MC尼龙6提高20%; 断裂伸长率提高33%; 弯曲模量提高36%; 冲击强度提高87%。纳米ZnO的加入对α晶型的衍射特征峰影响不大, 不改变尼龙6的结晶形态, 但使晶粒度加大, 结晶度减小; 动态高温XRD分析表明, 加入纳米ZnO, 能提高MC尼龙融熔温度, 纳米ZnO/MC尼龙6复合材料的结晶形态和相对结晶度在高低温度间基本是可逆的。 

Impacts of nano-ZnO on the structure and properties of MC nylon

Nano-ZnO/MC nylon 6 composites were prepared by the in situ polymerization method. The mechanical properties, morphology, structure and DSC, XRD analysis show that the inorganic particles disperse very well in the matrix and their diameters are smaller than 100nm. The tensile strength, break elongation, bend modulus and impact strength increase by 20%, 33%, 36% and 87% respectively compared with pure MC nylon. Nano-ZnO does not influence the characteristic peak of α-crystalline diffraction, and the crystal modality of nylon 6 is unchanged. The size of the grain is increased and the crystallinity is decreased for nano-ZnO adding. The dynamic XRD analysis shows that nano-ZnO increases the melting temperature of nano-ZnO/MC nylon 6 composites, while the crystalline morphology and relative crystalline degree are reversible among high and low temperatures.