Ordnungszustände im system polyamid-6 und polyamid-6, 6

Blends of PA-6 and PA-6,6 were studied by DSC for different conditions of crystallization. All samples were characterized by x-ray diffraction. From dilute solution the components crystallize in separate modifications. In the melt both components are compatible. PA-6- and PA-6,6-segments are linked together. During rapid quenching of the melt in the samples of about equal composition of PA-6 and PA-6,6 a modification is formed possibly built by a three-dimensional network of hydrogen bonds between PA-6- and PA-6,6-segments. If the samples of the same composition are annealed at 25 K below the melting temperatures of PA-6 and PA-6,6 for 3 hours in each case a modification appears as in quenched samples in addition to only partially ordered crystallites of PA-6 and PA-6,6. Despite optimal annealing there is no complete separation of the components.