Interfacial entanglement and co-crystallization are identified to cause adhesion. Adhesion between polyethylene and different types of polypropylenes (PPs), including impact-modified PP isotactic PP and ethylene-propylene random copolymers, was increased with concentration of ethylene or ethylene–propylene rubber and faster cooling in co-extrusion. A more miscible interface is the key for improved adhesion.
- Jie Song
- Anne Bringuier
- Christopher W Macosko
