Influence of geometrical parameters of screw melt mixing on visco‐elastic properties of PC/ABS blends

Abstract

In the present article, we describe an experimental study of blends of polycarbonate (PC) with acrylonitrile-butadiene-styrene graft copolymer (ABS) melt mixed in two types of single screw (varying in compression ratio) and twin screw (counter and co-rotational) extruders. The effect of screw design variation is qualified via storage and loss moduli differences obtained for particular screw geometries. Rotational rheometer with parallel-plates geometry was used to determine dynamic viscoelastic properties at a strain of 1% selected as the value representative of the linear viscoelasticity. Measurements were carried out at 220, 240, and 260 C and angular frequencies in the range from 0.1 to 100 rad/s. Regardless of the dependences variation with blend compositions, mixing performed on the extruder with counter rotating twin screws resulted in the lowest viscoelastic response in the whole range investigated. The rheological observations were confirmed by the results of SEM analysis.

Blends of recycled polycarbonate and acrylonitrile-butadiene-styrene: comparing the effect of reactive compatibilizers on mechanical and morphological properties

“…Hausnerova et al . demonstrated the effect of geometrical parameters of screw melt mixing on the viscoelastic properties of PC/ABS blends . O‐Charoen et al .…”

“…So, large amounts of this engineering blend are used in industry annually. Many researchers have investigated this blend from different points of view, such as processing conditions and morphological and mechanical properties . Yin and Wang investigated the effects of strain rate and ABS fraction on the tensile deformation behaviour of PC, ABS and PC/ABS alloys .…”