China Plastics ›› 2025, Vol. 39 ›› Issue (3): 7-11.DOI: 10.19491/j.issn.1001-9278.2025.03.002

• Materials and Properties • Previous Articles     Next Articles

Preparation and properties of PA6/CF composites toughened with epoxidized silicone rubber/methyl silicone rubber compounding system

ZHANG Weizhen1(), ZHANG Qi1, LI Yuan1, LU Yonglai2(), ZHANG Shijun1()   

  1. 1.Sinopec (Beijing) Research Institute of Chemical Industry Co,Ltd,Beijing 100013,China
    2.Beijing University of Chemical Technology,Beijing 100029,China
  • Received:2024-05-29 Online:2025-03-26 Published:2025-03-24

Abstract:

Polyamide 6 (PA 6)/carbon fiber composites toughed with epoxidized silicone rubber (ESR⁃5)/methyl silicone rubber (PDMS) compounding system were prepared through melt blending, and the effect of epoxy content on the mechanical properties, impact properties, heat resistance, and microstructure of PA6 composites was investigated. The results indicated that when there were 10 phr ESR⁃5 and 10 phr PDMS in the compounding system, the interface force between PA and silicone rubbers could be by in situ grafting reaction, thus enhancing the impact resistance and damage resistance of the composites. This resulted in an increase in the notched impact strength by 73.6 %, 178.0 % and 196.8 % at 23, -20, and -60 ℃, respectively, compared to the composites without toughening, exhibiting an excellent impact resistance in low temperature environment. This also minimized the impact of introducing elastomers to the reduction in the mechanical properties of the composite system. Meanwhile, the thermal stability of the composites was improved. The ESR⁃5/PDMS toughening system provides a feasible solution for the applications of carbon⁃fiber⁃reinforced PA6 composites in low temperature environments.

Key words: epoxidized silicone rubber, polyamide 6, carbon fiber reinforced composite, toughening modification

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