P. Jannasch et B. Wesslen, STRESS-STRAIN BEHAVIOR AND IMPACT STRENGTH OF POLYSTYRENE POLYAMIDE-6BLENDS COMPATIBILIZED WITH POLY(STYRENE-G-ETHYLENE OXIDE)/, Journal of applied polymer science, 70(10), 1998, pp. 1887-1891
The mechanical properties of polystyrene/polyamide-6 (50/50 wt/wt) ble
nds were improved by additions of small amounts of poly(styrene-g-ethy
lene oxide) (SEO) during compounding by extrusion. Tensile testing of
injection-molded samples revealed that the blends developed a yield po
int after addition of 1 wt % SEO. The elongation at break increased by
almost a factor of 6, and the impact strength increased by a factor o
f 1.5 after adding 3 wt % SEO. Morphological analysis by electron micr
oscopy showed that additions of SEO resulted in decreased domain sizes
, and seemed to promote interfacial adhesion. The morphologies of the
compatibilized blends also had a higher degree of anisotropy, as compa
red with the uncompatibilized blend. (C) 1998 John Wiley & Sons, Inc.