PP-纳米二氧化硅的界面稳定化改性研究

章丹阳, 王元霞, 宋立新, 杨睿

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塑料科技 ›› 2025, Vol. 53 ›› Issue (01) : 46-50. DOI: 10.15925/j.cnki.issn1005-3360.2025.01.008
理论与研究

PP-纳米二氧化硅的界面稳定化改性研究

作者信息 +

Study on Interfacial Stabilization Modification of PP-nanosilica Composite

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History +

摘要

纳米颗粒对聚合物的力学性能有显著的增强作用，但由于纳米颗粒表面化学物质的催化作用，它们的存在往往会加速聚合物的老化。因此，在纳米颗粒表面接枝抗老化的化学基团可以提高聚合物复合材料的稳定性。选择聚丙烯（PP）-纳米二氧化硅（A380）复合材料为典型体系，在纳米二氧化硅颗粒表面接枝位阻酚官能团。与未进行表面改性的复合材料（PP-A380）相比，接枝改性后的纳米二氧化硅在PP中分散均匀，表面改性的PP-A380复合材料具有较好的热稳定性。由于化学接枝，位阻酚表现出较好的抗迁移性，表面接枝有助于力学性能的改善。

Abstract

Nanoparticles significantly enhance the mechanical properties of polymers, but their presence tends to accelerate polymer aging due to the catalytic effect of chemicals on the surface of nanoparticles. Therefore, the stability of polymer composites can be improved by grafting anti-aging chemical groups on the surface of nanoparticles. In this paper, polypropylene (PP)-nanosilica (A380) composites were selected as a typical system, and site-resistant phenol functional groups were grafted on the surface of nanosilica. Compared with the composites without surface modification (PP-A380), the graft-modified nanosilica were uniformly dispersed in PP, and the surface-modified PP-A380 composites had better thermal stability. Due to chemical grafting, the site-resistant phenol showed better migration resistance. Surface grafting also contributed to the improvement of mechanical properties.

关键词

聚丙烯复合材料 / 纳米二氧化硅 / 老化 / 表面改性 / 氧化诱导期

Key words

Polyprolylene composites / Nanosilica / Aging / Surface modification / Oxidative induction time

中图分类号

TQ430.15

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章丹阳 , 王元霞 , 宋立新 , 等. PP-纳米二氧化硅的界面稳定化改性研究. 塑料科技. 2025, 53(01): 46-50 https://doi.org/10.15925/j.cnki.issn1005-3360.2025.01.008
ZHANG Danyang, WANG Yuanxia, SONG Lixin, et al. Study on Interfacial Stabilization Modification of PP-nanosilica Composite[J]. Plastics Science and Technology. 2025, 53(01): 46-50 https://doi.org/10.15925/j.cnki.issn1005-3360.2025.01.008

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