Extrusion & Post
12 مشاهدة
DSTDP blended with incompatible resins delamination
ظاهرة المشكلة
DSTDP blended with polar resins such as PA/ABS, extrudate completely delaminates, mechanical properties extremely poor
تحليل الأسباب
DSTDP and polar resins have large polarity difference, compatibility is zero, interfacial adhesion extremely low, no compatibilizer used
الحل
1) Use DSTDP graft compatibilizer DSTDP-g-MAH 2-5wt%; 2) add epoxy-type compatibilizer 1-2wt%; 3) keep DSTDP addition <10wt% to keep the other resin as the continuous phase; 4) twin-screw high-shear compounding to disperse DSTDP <0.3μm
الخلاصة الأساسية
Blends with large polarity differences require reactive compatibilizers that form chemical bonding at the interface to solve
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