Rheological and Crystallization Properties of ABS/PA6-Compatibilized Blends via In Situ Reactive Extrusion

Abstract

ABS/PA6-compatibilized blends were prepared by in situ reactive extrusion method. The main objective was to evaluate the influences of the morphology and blend composition on the rheological and nonisothermal crystallization properties. The morphology of submicron-sized ABS droplets evenly dispersed in PA6 led to dilatant fluid behavior and a transition from elastic to viscous behavior in the low-frequency region. The crystallization results indicated that reactive blends had elevated crystallization temperatures and crystallization rates, which were due to the heterogeneous nucleation of the submicron-sized ABS particles. In addition, it was observed that the theory by Mo suitably described the nonisothermal crystallization process. The activation energy slightly decreased for ABS contents of 5 and 15 wt % and then increased for a content of 25 wt %, indicating that the ABS promoted the crystallization of the blends at appropriate contents.

Acrylonitrile Butadiene Styrene/Thermoplastic Polyurethane Blends for Material Extrusion Three-Dimensional Printing: Effects of Blend Composition on Printability and Properties

“…This agreed with the morphological observation of the smooth fractured surface of this blend filament which was mentioned in Section above. Surprisingly, the storage moduli of the filaments blended with smaller contents of TPU, i.e., 30 and 50 wt %, became lower than that of the neat ABS filament, possibly indicating the phase-separated microstructures of such blends …”

“…The storage moduli of the ABS/TPU blends gradually increased with an increasing frequency. The addition of TPU into ABS had the potential to change the ratio between the rubber phase (butadiene) and the plastic phase (styrene-acrylonitrile) component, altering the interaction between these phases, thus influencing the rheological, morphological, and mechanical properties . Notably, all storage modulus curves of the blend samples did not fall between those of the neat polymers; only A30T70 did, suggesting that this material exhibited a well-compatible blend characteristic .…”

“…Surprisingly, the storage moduli of the filaments blended with smaller contents of TPU, i.e., 30 and 50 wt %, became lower than that of the neat ABS filament, possibly indicating the phase-separated microstructures of such blends. 35 Figure 5c presents the almost linear-like decrease in the complex viscosity as a function of the angular frequency of each test filament. Like the results of the relationships between storage modulus and angular frequency, the complex viscosity of A30T70 exclusively lay between those of the neat polymer filaments.…”

Thermoplastic self‐healing polymer blends for structural composites: Development of polyamide 6 and cyclic olefinic copolymer blends

“…A similar result was observed also in the work of Wang et al 48 in which the effect of the addition of PBAT on the rheological properties of a PLA matrix was investigated. Zhao et al 49 studied the rheological and crystallization properties of acrylonitrile butadiene styrene (ABS)/PA6 compatibilized blends. They also reported an increment in the G 0 as a function of the ABS concentration in the blend.…”

Green Approaches in Rubber Recycling Technologies: Present Status and Future Perspective

“…Typically, each technology has its own advantages and disadvantages. A comparison between reactive extrusion and other classical rubber recycling technologies witnesses some serious differences in terms of processing, quality control, and treatment efficiency. − Principally, reactive extrusion is an intensive mixing process accompanied by degassing, enabling facile production of high-quality multicomponent mixtures. It is introduced to make it possible to chemically modify polymer materials through a continuous processing manner.…”