Material Analysis
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PETG transparency loss after toughening
Problem Phenomenon
After PETG toughening modification, the transparency decreases severely, becoming translucent to opaque.
Cause Analysis
The refractive index of the toughening agent elastomer does not match PETG, and the toughening agent dispersed phase size is too large (>visible light wavelength) causing light scattering.
Solution
Select a toughening system with matching refractive index; optimize the dispersion process to make the toughening phase <100nm nano-toughening; control the toughening agent dosage.
Key Takeaway
PETG toughening with transparency requires refractive index matching and nano-scale dispersion.
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