Role of the interfacial orientation in adhesion between semicrystalline polymers

To understand the molecular mechanisms responsible for the adhesion between isotactic polypropylene (iPP) and polyamide 6 (PA6) ix the presence of iPP -PA6 diblock copolymer, thin film assemblies with a typical thickness of 11 5 nm have been prepared. The crystalline orientation of the iPP and of the PA6 close to the interface has been investigated by X-ray diffraction. An e pitaxial crystallization of iPP on PA6 was observed. Similarly to what happ ens for adhesive strength, the epitaxy is enhanced when increasing the copo lymer surface density or the length of the PP block and further enhanced wh en the samples were annealed above the melting temperature of PA6.