CRYSTALLIZATION OF POLYAMIDE-6, POLYAMIDE-6.6, AND POLYAMIDE-6.10 IN BLENDS WITH ACRYLONITRILE-BUTADIENE-STYRENE-COPOLYMER

Polyamide-6, PA-6, polyamide-6.6, PA-6.6, and polyamide-6.10, PA-6.10 in blends with acrylonitrile-butadiene-styrene-copolymer ABS, were inv estigated by DSC (differential scanning calorimetry) and WAXS (wide an gle X-ray scattering) in order to clarify their crystallization behavi or. With an increasing content of ABS there is a decrease of the cryst allization and melting temperature of the polyamides measured. This is a result of an increasing disturbance of the spherulitic crystallizat ion caused by a kinetic hindrance of lamellar growth at the interface between PA and ABS and the resulting formation of smaller and/or less perfect crystallites. The hindrance becomes more and more distinct, th e bigger the surface of the PA phase in proportion to the content of p olyamide in the blend is. In blends of PA-6.6 with ABS and PA-6.10 wit h ABS fractionated crystallization is observed.