The anti-aging agent TiO₂–polyacrylonitrile (PAN) and the mechanical strengthening agent CSW–PAN were prepared by radical polymerization using rutile nano-titanium dioxide (TiO₂) and anhydrous calcium sulfate whisker (CSW) as raw materials. The structures of TiO₂–PAN and CSW–PAN were characterized using Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Simultaneously, the mechanical properties, aging properties, and thermal stability of TiO₂–PAN/CSW–PAN/polypropylene (PP) composites were studied, and the results showed that the surfaces of nano-titanium dioxide and calcium sulfate whiskers were successfully grafted with acrylonitrile. Owing to the introduction of new elements, such as acrylonitrile, nano-titanium dioxide and calcium sulfate whiskers have anti-aging properties. In comparison of the impact strength and tensile strength of TiO₂–PAN/PP and TiO₂–PAN/CSW–PAN/PP before aging, it can be proven that adding CSW–PAN can significantly enhance the mechanical properties of TiO₂–PAN/CSW–PAN/PP. After 1000 h of aging, the tensile strength of the ternary composite TiO₂–PAN/CSW–PAN/PP was 19.88 MPa when the addition amount of TiO₂–PAN and CSW–PAN was 3%. Moreover, the impact strength of the ternary composite material TiO₂–PAN/CSW–PAN/PP after 1000 h of aging is even better than that of non-aging pure PP materials, proving that the service life of improved PP products is extended, unnecessary waste and environmental pollution can be relieved, and the needs of specific engineering fields can be met.

中文翻译：

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二氧化钛和硫酸钙晶须用于制备高性能聚丙烯并减少白色污染


以金红石纳米二氧化钛（TiO ₂ ）和无水钙为原料，通过自由基聚合法制备了抗老化剂TiO ₂ -聚丙烯腈（PAN）和机械增强剂CSW-PAN。以硫酸盐晶须（CSW）为原料。使用傅里叶变换红外光谱（FTIR）和X射线光电子能谱（XPS）对TiO ₂ –PAN和CSW-PAN的结构进行了表征。同时对TiO ₂ -PAN/CSW-PAN/聚丙烯(PP)复合材料的力学性能、老化性能和热稳定性进行了研究，结果表明，纳米二氧化钛和钙表面硫酸盐晶须成功接枝于丙烯腈。由于引入了丙烯腈等新元素，纳米二氧化钛和硫酸钙晶须具有抗老化性能。 TiO ₂ –PAN/PP 与 TiO ₂ –PAN/CSW–PAN/PP 老化前的冲击强度和拉伸强度比较，可以证明添加 CSW- PAN可以显着提高TiO ₂ -PAN/CSW-PAN/PP的机械性能。老化1000 h后，当TiO ₂ -PAN和CSW-的添加量时，三元复合材料TiO ₂ -PAN/CSW-PAN/PP的拉伸强度为19.88 MPa。 PAN为3%。而且，三元复合材料TiO ₂ -PAN/CSW-PAN/PP在老化1000h后的冲击强度甚至优于未老化的纯PP材料，证明其使用寿命改进后的PP产品得到扩展，可以减少不必要的浪费和环境污染，并可以满足特定工程领域的需求。