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