Material Analysis
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Poor interfacial bonding between EAA and filler
Fenómeno do problema
The tensile strength of the EAA/filler composite is lower than that of pure EAA, playing a negative role
Análise das causas
Poor interfacial affinity between filler and EAA, no coupling agent treatment used; filler particles agglomerate, dispersed particle size >5μm; EAA has insufficient wettability to rigid fillers
Solução
1) Pretreat the filler with silane coupling agent KH-560 at 0.5-1wt%; 2) Add 2-3wt% EAA compatibilizer to strengthen interfacial bonding; 3) Use ultrafine filler d50<2μm; 4) Twin-screw high-shear blending to ensure dispersion
Conclusão principal
The elastomer-filler interface requires the dual action of coupling agent and compatibilizer, otherwise the filler has a negative effect
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