Rheological Investigation of Relaxation Behavior of Polycarbonate/Acrylonitrile-Butadiene-Styrene Blends

Abstract

The rheological properties of polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) blends with various blend ratios are investigated at different temperatures to determine the shear dependent chain motions in a heterogeneous blend system. At low frequency levels under 0.1 rad/s, the viscosity of the material with a blend ratio of 3:7 (PC:ABS) is higher than that of pure ABS polymer. As the temperature increases, the viscosities of ABS-rich blends increase rather than decrease, whereas PC-rich blends exhibit decrease in viscosity. Results from the time sweep measurements indicate that ordered structures of PC and the formation and breakdown of internal network structures of ABS polymer occur simultaneously in the blend systems. Newly designed sequence test results show that the internal structures formed between PC and ABS polymers are dominant at low shear conditions for the blend ratio of 3:7 and effects of structural change and the presence of polybutadiene (PBD) become dominant at high shear conditions for pure ABS. The results of yield stress and relaxation time for PC/ABS blends support this phenomenon. The specimen with a blend ratio of 3:7 exhibited the highest value of yield stress at high temperature among others, which implies that the internal structure become stronger at higher temperature. The heterogeneity of ABS-rich blends increases whereas that of PC-rich blends decreases as temperature increases.

Dual-Sizing Effects of Carbon Fiber on the Thermal, Mechanical, and Impact Properties of Carbon Fiber/ABS Composites

“…From an industrial viewpoint, acrylonitrile-butadiene-styrene (ABS) is one of the most important thermoplastic resins with a combination of good mechanical, thermal, and impact properties and processability, depending on the chemical composition of acrylonitrile, butadiene, and styrene components therein [ 37 , 38 , 39 ]. It has been widely used in many industrial parts, such as automobiles, appliances, electronic housings, etc.…”

Additive Manufacturing of a Super Toughened Biodegradable Polymer Blend: Structure–Property-Processing Correlation and 3D Printed Prosthetic Part Development

“…As the frequency increased, both the storage and loss modulus of the blend showed a corresponding rise, confirming their compliance with the principles of linear viscoelastic theory, as depicted in Figure a,b. Moreover, an increase in temperature resulted in a decrease in both the storage and loss modulus due to enhanced molecular mobility, weakening of intermolecular forces, and a shorter relaxation time …”

“…Moreover, an increase in temperature resulted in a decrease in both the storage and loss modulus due to enhanced molecular mobility, weakening of intermolecular forces, and a shorter relaxation time. 48 The rheological behavior of polymers in extrusion printing is influenced by shear thinning, as indicated by the flow behavior index "n". A lower "n" value signifies a more pronounced shear thinning effect, which is beneficial for the processability of the polymer in extrusion printing.…”