Extrusion & Post
13 visualizaciones
Delamination in PU Blending with Incompatible Resins
Fenómeno del problema
PU blended with polar resins such as PA/ABS, extrudate completely delaminated, mechanical properties extremely poor
Análisis de la causa
PU and polar resins have large polarity difference, compatibility zero, interfacial adhesion extremely low, no compatibilizer used
Solución
1) Use PU graft compatibilizer PU-g-MAH 2-5wt%; 2) Add epoxy-type compatibilizer 1-2wt%; 3) PU addition <10wt% to keep the other resin as the continuous phase; 4) Twin-screw high-shear blending to disperse PU <0.3μm
Conclusión clave
Blends with large polarity difference require reactive compatibilizer to form chemical bonding at the interface to solve it
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!