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Photoantioxidant versus photodegradant: Action of nanoparticle inorganic fillers in outdoor aging of PP
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2021-08-27 , DOI: 10.1002/vnl.21863 Zhiping Xu 1 , Zhenhua An 1 , Yan Ye 1 , Rui Yang 1
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2021-08-27 , DOI: 10.1002/vnl.21863 Zhiping Xu 1 , Zhenhua An 1 , Yan Ye 1 , Rui Yang 1
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Owing to the widespread use of polypropylene (PP) nanocomposites, their stability in the environment is becoming increasingly relevant. Accordingly, a systematic study of the relationship between the characteristics of inorganic nanofillers and the environmental aging behavior of PP is necessary to determine the service life of PP nanocomposites in outdoor environments. Therefore, in this study, we systematically investigated the effects of the chemical composition, particle size, crystalline form, and amount of inorganic filler (CaCO3, Al2O3, SiO2, and ZnO) on the outdoor aging behavior of PP. The results of outdoor aging experiments showed that the filler composition affects the aging behavior of PP. It was found that SiO2 and ZnO nanoparticles accelerate and retard the outdoor aging of PP, respectively. In addition, PP composites containing inorganic fillers with relatively large particles or more stable crystalline forms exhibit relatively slow aging. In the case of the fillers other than ZnO nanoparticles, increasing the filler content accelerates the outdoor aging of PP. The evolution of cracks in the exposed surfaces of PP composites during outdoor aging was observed by scanning electron microscopy. The CO2 generated by PP composites during in situ gaseous degradation product detection corresponds well with the results of the outdoor aging experiments. This study elucidates the effects of inorganic fillers on the outdoor aging behavior of PP.
中文翻译：
光抗氧化剂与光降解剂：纳米颗粒无机填料在 PP 室外老化中的作用
由于聚丙烯（PP）纳米复合材料的广泛使用，它们在环境中的稳定性变得越来越重要。因此，有必要系统研究无机纳米填料的特性与PP的环境老化行为之间的关系，以确定PP纳米复合材料在户外环境中的使用寿命。因此，在本研究中，我们系统地研究了无机填料（CaCO 3、Al 2 O 3、SiO 2和ZnO）的化学成分、粒径、晶型和用量对PP户外老化行为的影响。户外老化实验结果表明，填料成分影响PP的老化行为。发现SiO2和ZnO纳米粒子分别加速和延缓PP的户外老化。此外，含有具有较大颗粒或更稳定晶型的无机填料的PP复合材料表现出相对较慢的老化。对于 ZnO 纳米颗粒以外的填料，增加填料含量会加速 PP 的户外老化。采用扫描电镜观察户外老化过程中PP复合材料外露表面裂纹的演变过程。PP复合材料在原位气态降解产物检测过程中产生的CO 2与户外老化实验的结果很好地吻合。本研究阐明了无机填料对 PP 户外老化行为的影响。
更新日期：2021-08-27
中文翻译：
光抗氧化剂与光降解剂：纳米颗粒无机填料在 PP 室外老化中的作用
由于聚丙烯（PP）纳米复合材料的广泛使用，它们在环境中的稳定性变得越来越重要。因此，有必要系统研究无机纳米填料的特性与PP的环境老化行为之间的关系，以确定PP纳米复合材料在户外环境中的使用寿命。因此，在本研究中，我们系统地研究了无机填料（CaCO 3、Al 2 O 3、SiO 2和ZnO）的化学成分、粒径、晶型和用量对PP户外老化行为的影响。户外老化实验结果表明，填料成分影响PP的老化行为。发现SiO2和ZnO纳米粒子分别加速和延缓PP的户外老化。此外，含有具有较大颗粒或更稳定晶型的无机填料的PP复合材料表现出相对较慢的老化。对于 ZnO 纳米颗粒以外的填料，增加填料含量会加速 PP 的户外老化。采用扫描电镜观察户外老化过程中PP复合材料外露表面裂纹的演变过程。PP复合材料在原位气态降解产物检测过程中产生的CO 2与户外老化实验的结果很好地吻合。本研究阐明了无机填料对 PP 户外老化行为的影响。
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