Material Analysis
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Poor interfacial bonding between Glass Fibre and filler
Problem Phenomenon
Glass Fibre/filler composite tensile strength is instead lower than pure Glass Fibre, playing a negative role
Cause Analysis
Poor interfacial affinity between filler and Glass Fibre, no coupling agent treatment used; filler particles agglomerated, dispersed particle size >5μm; Glass Fibre insufficient wetting of rigid filler
Solution
1) Filler pretreatment with silane coupling agent KH-560 0.5-1wt%; 2) add Glass Fibre compatibilizer 2-3wt% to strengthen interfacial bonding; 3) use ultrafine filler d50<2μm; 4) twin-screw high-shear blending ensures dispersion
Key Takeaway
The elastomer/filler interface needs the dual action of coupling agent and compatibilizer, otherwise the filler plays a negative effect
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