Research Background and Problems: When graphene is compounded with flame retardants, they may exhibit antagonistic effects on flame retardancy, limiting their application in polyolefin systems. In response to this issue, researchers propose to covalently graft modify graphene nanosheets (GNSs) with a novel flame retardant, polyphenylphosphoramidite (PPPB), and apply the modified product GNS-PPPB to linear low-density polyethylene (LLDPE).
Key data and performance
Research shows that modified LLDPE composite materials exhibit relatively balanced comprehensive performance:
- When the addition of GNS-PPPB is 1 wt.%, the tensile strength of LLDPE/GNS-PPPB1 reaches 18.11 MPa, an increase of 21.4% compared to unmodified LLDPE.
. When the addition amount is 2 wt.%, the peak heat release rate and total heat release of LLDPE/GNS-PPPB2 are reduced by 17.7% and 10.4% respectively compared to unmodified LLDPE. The addition of GNS-PPPB has little effect on the thermal stability of LLDPE composite materials, while the aging resistance of LLDPE is improved.
Significance for the polymer additive industry
This study improved the mechanical properties, flame retardancy, and aging resistance of non-polar polyolefin systems through covalent grafting, providing a feasible strategy to overcome the potential antagonistic effect between graphene and expansion flame retardants.
. For the field of electronics and electrical engineering, engineering plastics and cable materials often need to balance flame retardancy, weather stability, and mechanical reliability. This modification approach is expected to provide reference for the collaborative design of flame retardant systems with antioxidants and weather stability additives. However, the current data is based on the LLDPE system and specific PPPB structure, and further validation is needed for its promotion to other engineering plastics and actual electronic and electrical components.
Observation of Herun Chemical
Focusing on electronic and electrical, flame retardant, weather resistant and stable, antioxidant, engineering plastics, Herun Chemical continues to pay attention to the technological progress, processing stability and application landing in this field.
. This article is edited and organized based on source information. Please consult with actual working conditions for specific formulas, product selection, and performance verification.
Information source:Effect of Intumescent Flame‐Retardant Modified Graphene on the Thermal Decomposition and Flame Retardancy of Polyethylene， Organized by Herun Chemical.
Herun Chemical Observations
Herun Chemical follows material technology, processing stability and application trends in this field. The content is compiled from public information and general industry knowledge; please confirm formulations, product selection and validation with our technical team for your specific conditions.