Extrusion & Post
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CEF blended with incompatible resin delaminates
Problem Phenomenon
CEF blended with polar resins such as PA/ABS, the extrudate completely delaminates, extremely poor mechanics
Cause Analysis
CEF and polar resin polarity difference large, compatibility zero, interfacial adhesion extremely low, no compatibilizer used
Solution
1) Use CEF graft compatibilizer CEF-g-MAH 2-5wt%; 2) Add epoxy compatibilizer 1-2wt%; 3) CEF addition amount <10wt%, keep the other resin as continuous phase; 4) Twin-screw high-shear blending to disperse CEF <0.3μm
Key Takeaway
Blends with large polarity differences need reactive compatibilizers to form chemical bonding at the interface to solve
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