PP-AA blends

These effects, supported by a marked increase of melt viscosity, were related to the occurrence of chemical interactions between the polyamides and functionalized polyolefins at the interface. DSC analysis showed that incompatible Ny6/PP and Ny6/LDPE blends exhibit at all compositions separated crystallization peaks of the two components, whereas the compatibilized blends displayed fractionated and/or coincident crystallization phenomena. For Ny6/PP-AA blends where Ny6 is the matrix, the crystallization of the polyamide phase takes place in a narrow range, close to 190 C, as observed for pure Ny6 (Hg. 10.26a). When Ny6 is the dispersed phase. 

Melting thermograms of Ny6/PP-AA blends with polyamide as dispersed phase, isothermally crystallized from the melt, revealed also the presence of melting peaks of Ny6 at temperatures lower than the usual melting temperature of a form (221 °C), indicating the existence of a considerable amount of y form crystals (215 C). No melting peak of /phase was observed for Ny6/iPP blends at any Ny6 content. 

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