Extrusion & Post
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MP blended with incompatible resin delamination
Problem Phenomenon
MP blended with polar resins such as PA/ABS, extrudate completely delaminated, mechanical properties extremely poor
Cause Analysis
MP and polar resin have large polarity difference, compatibility is zero, interfacial adhesion extremely low, no compatibilizer used
Solution
1) use MP graft compatibilizer MP-g-MAH 2-5wt%; 2) add epoxy-type compatibilizer 1-2wt%; 3) MP addition <10wt% to keep the other resin as the continuous phase; 4) twin-screw high-shear compounding to disperse MP <0.3μm
Key Takeaway
blends with large polarity difference require a reactive compatibilizer to form chemical bonding at the interface to solve
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