Effects of the polybutadiene/poly(styrene‐co‐acrylonitrile) ratio in a polybutadiene‐g‐poly(styrene‐co‐acrylonitrile) impact modifier on the morphology and mechanical behavior of acrylonitrile–butadiene–styrene blends

Abstract

Polybutadiene-g-poly(styrene-co-acrylonitrile) (PB-g-SAN) impact modifiers with different polybutadiene (PB)/poly(styrene-co-acrylonitrile) (SAN) ratios ranging from 20.5/79.5 to 82.7/17.3 were synthesized by seeded emulsion polymerization. Acrylonitrile-butadiene-styrene (ABS) blends with a constant rubber concentration of 15 wt % were prepared by the blending of these PB-g-SAN copolymers and SAN resin. The influence of the PB/SAN ratio in the PB-g-SAN impact modifier on the mechanical behavior and phase morphology of ABS blends was investigated. The mechanical tests showed that the impact strength and yield strength of the ABS blends had their maximum values as the PB/SAN ratio in the PB-g-SAN copolymer increased. A dynamic mechanical analysis of the ABS blends showed that the glass-transition temperature of the rubbery phase shifted to a lower temperature, the maximum loss peak height of the rubbery phase increased and then decreased, and the storage modulus of the ABS blends increased with an increase in the PB/SAN ratio in the PB-g-SAN impact modifier. The morphological results of the ABS blends showed that the dispersion of rubber particle in the matrix and its internal structure were influenced by the PB/SAN ratio in the PB-g-SAN impact modifiers.

Additivity of the mechanical properties for acrylonitrile‐butadiene‐styrene resins

“…The essential information for each data vector accounts the composition, processing molding, the settings in tensile test measurements, and mechanical properties. The composition is expressed by the mass/molar/volume fractions for A, B, and S. Mass fraction is normally presented in original reports, the molar fraction is converted through the dividing of the molar weight of 53.06, 54.09, and 104.15 g/ mol for the monomer of A, B, and S. Similarly, the volume fraction of them was converted through the bulk density of 0.81, 0.62, and 0.91 g/cm 3 for A, B, and S. 23 Meanwhile, to quantify the compatibility of these three components, their cohesive energy density are 32,550, 17,750, and 36,950 J/ mol for A, B, and S. 20 Processing methods including 3D printing, extrusion, injection, and compression, together with processing temperature ( C) constitute processing molding details. The settings in tensile test measurements are composed of temperature ( C), the speed of crosshead (mm/min), strain rate (the speed of crosshead/the length of spline, min À1 ), the shape of spline (dumbbell, strip, film), and the dimensions of spline (length, width, thickness, mm, and the section area, mm 2 ).…”

“…Acrylonitrile-butadiene-styrene (ABS) resins has expanded the global market up to 26 billion dollars in 2020 spreading in automotive, transportation, and electronic industry since its invention in 1940s. ABS resin is generally regarded as butadiene-rubbery domains dispersed in poly(styrene-co-acrylonitrile) (AS) matrix, [1][2][3][4] or AS hard domains enhanced soft butadiene rubbery network, or they form bi-continuous and interpenetrated phases. The AS hard domain is in charge of the resin's rigidity and strength, while the B rubbery domain is in charge of impact strength and low-temperature rebound.…”

Effects of styrene–acrylonitrile contents on the properties of ABS/SAN blends for fused deposition modeling

“…ABS resin is usually composed of a binary phase system: the dispersed phase is grafted polybutadiene (PB) rubbery particles and the continuous phase is styrene–acrylonitrile (SAN) copolymer. The physical and mechanical properties, and rheological behavior of ABS are greatly influenced by the rubbery particle size and content, grafting degree, molecular weight of SAN resin etc . Therefore, varying of these parameters allows the ABS producers to tailor their products according to the end‐use applications.…”

Toughening Polystyrene by Core-Shell Rubber Particles: Analysis of the Internal Structure and Properties

“…To improve compatibility between the rubber particles and the glassy matrix, so-called core-shell impact modifiers have been developed [10][11][12][13][14][15] . The typical core-shell architecture consists of a soft cross-linked rubber core and a grafted shell designed specifically to interact with the glassy matrix.…”