Instrumented impact property and fracture process behavior of composite rubber toughened abs terpolymer

Abstract

A series of low‐cis‐1,4/high‐cis‐1,4 polybutadiene composite rubber toughened poly(acrylonitrile‐butadiene‐styrene) (ABS) terpolymers were prepared and characterized. The morphological analysis shows that specimens exhibit common characteristics of two single rubbers while mechanical measurements reveal that better comprehensive properties can be obtained as more Ni‐9004 blended in composite rubber. When increasing Ni‐9004/Li‐700A ratio, one brittle–ductile transition occurs at 5.0 wt % rubber usage and three transition regions exist under 10.0 wt % usage. In addition, the characteristic force–time curves and fractography demonstrate that failure behavior and crack propagation mode can be effectively evaluated. Conclusively, quasi‐brittle fracture can be seen for specimens with obvious cavitation and matrix stripping followed by riverlike fibrous and periodical Wallner stripes, whereas ductile fracture is observed for those with alternate parabolic and firework patterns accompanying stress‐whitening and ligament‐forming progress. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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

“…Other general and apparent reasons responsible to the ultimate EB may also include the internal tension in incompatible interfaces, which is normally seen for rubbers with polymer matrix and inorganic fillers, 41 and a large number of ABS resins have grafted rubber or rubbery particles dispersed in matrix 45 . Where incompatible internal phase, the excessively low or high graft degree, the agglomeration of rubber particles, cracks, and other factors for less ductile ABS resins, it causes the failure for the additivity principle 46,47 …”

“…45 Where incompatible internal phase, the excessively low or high graft degree, the agglomeration of rubber particles, cracks, and other factors for less ductile ABS resins, it causes the failure for the additivity principle. 46,47 Accordingly, by consideration the mechanical contribution from A, B, and S using the molar and volume fractions, the fraction of ABS resins that can be accurately predicted (Cov) were shown in Table 1. The YM and TS for tri-copolymer and bi-copolymer all can be well predicted by the additivity principle, except for AB copolymers.…”

Toughness improvement of poly(lactic acid) by the addition of pre-crosslinked powdered nitrile rubber/CaCO3 for thermoforming molding

“…The first makes it possible to calculate the energy needed to deform the sample and generate an unstable crack (EI), and the second reflects the energy required for crack propagation (EP). 26,27 In this study, EI and EP were calculated, respectively, by integrating the area under the f-t curve from the start to maximum load (Fmax), and from Fmax to full sample break. The calculated values of EI and EP are shown in Table 2.…”

Fractographic analysis of the crack resistance of styrene–acrylonitrile/polybutadiene‐g‐styrene–acrylonitrile blends as evaluated by the essential work of fracture method

“…For these toughened polymers, significant stress whitening occurs before fracture, and the frac-ture toughness is many times higher than that of unmodified neat polymer. For this reason, numerous studies have been conducted on ABS polymers in recent decades; they have considered the effects of different microstructural factors of the material and processing and test conditions on the phase morphology, [14][15][16][17][18][19] mechanical properties, 16,[18][19][20][21][22] and deformation behavior 3,12,16,[20][21][22][23][24][25][26][27][28][29][30] of the final product. [3][4][5][6][7][8][9][10][11] The rubber particles act as both a craze initiator and a craze terminator in the matrix.…”

“…3,12,13 Because of its chemical structure and twophase morphology, ABS represents an attractive combination of strength, toughness, chemical resistance, and thermal stability; this makes it a very suitable candidate for widespread engineering applications. For this reason, numerous studies have been conducted on ABS polymers in recent decades; they have considered the effects of different microstructural factors of the material and processing and test conditions on the phase morphology, [14][15][16][17][18][19] mechanical properties, 16,[18][19][20][21][22] and deformation behavior 3,12,16,[20][21][22][23][24][25][26][27][28][29][30] of the final product. To determine the toughness, the vast majority of the studies have focused on simple impact tests with a few reports on the application of the J-integral method as a fracture mechanics-based approach.…”