CALORIMETRIC AND X-RAY-INVESTIGATIONS OF POLYAMIDE-6 AND ITS BLENDS WITH A POLYETHYL ACRYLATE ELASTOMER - PART II - GLASS-TRANSITION OF THECOMPONENTS COOLED SLOWLY FROM THE MELT AND QUENCHED

Systems from polyamide-6 (PA-6) and partly crosslinked polyethyl acryl ate (PEA), containing residual crosslinking agent (diglycidyl ether), were studied using differential calorimetric methods. It is shown that the dramatic changes in the morphology of the blends can be detected and interpreted using Delta C-p-values of the components as well as th eir glass transition temperatures. An increase in the Delta C-p-values is observed with increasing PEA content because the degree of crossli nking is reduced by simultaneous increase in the amount of crosslinkin g agent in the mixture. Remarkably the values are always lower than th ose of pure PA-6 with similar degrees of crystallinity. The crosslinki ng agent reacts with both components. In the interface regions copolym ers are formed.