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首页> 外文期刊>Journal of Applied Polymer Science >Effect of nanosilica on the properties of polyester-based polyurethane
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Effect of nanosilica on the properties of polyester-based polyurethane

机译：纳米二氧化硅对聚酯基聚氨酯性能的影响

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Polyester-based polyurethanes with embedded nanosilica particles were prepared. The viscosity of polyester resins without and with nanosilica was determined by rheoviscometry. The morphology and mechanical and optical properties of the polyurethane coatings were studied intensively with a transmission electron microscope, a pendulum hardness tester, a scanning probe microscope, an Instron testing machine, an abrader and an ultraviolet-visible spectrophotometer. The viscosity of the polyester resins increased as the nanosilica content increased. Nanosilica could basically be dispersed into the polyester and its polyurethane on a nanoscale. The addition of a small amount of nanosilica increased the hardness, abrasion resistance, and tensile properties of the polymer films. However, these mechanical properties could be worsened at higher nanosilica contents. The ultraviolet-visible spectra showed that the absorbance and reflection of ultraviolet-visible light by the polyurethane films increased as the nano-SiO2 content increased, especially at wavelengths of 290-400 nm. (C) 2003 Wiley Periodicals, Inc. [References: 11]
机译：制备了具有嵌入式纳米二氧化硅颗粒的聚酯基聚氨酯。通过流变粘度法测定不具有和具有纳米二氧化硅的聚酯树脂的粘度。用透射电子显微镜，摆锤硬度计，扫描探针显微镜，Instron测试机，研磨机和紫外可见分光光度计对聚氨酯涂层的形貌，力学和光学性能进行了深入研究。聚酯树脂的粘度随着纳米二氧化硅含量的增加而增加。纳米二氧化硅基本上可以以纳米级分散到聚酯及其聚氨酯中。少量纳米二氧化硅的添加提高了聚合物膜的硬度，耐磨性和拉伸性能。但是，在较高的纳米二氧化硅含量下，这些机械性能可能会变差。紫外可见光谱表明，随着纳米SiO 2含量的增加，聚氨酯膜对紫外可见光的吸收和反射增加，特别是在290-400 nm波长处。 （C）2003 Wiley Periodicals，Inc. [参考：11]

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