Effects of structure of ABS powder and antioxidant dosage on properties of ABS resin
In this study,acrylonitrile-butadiene-styrene copolymer(ABS)grafting copolymer latexes with core/shell mass ratios of 60/40 and 70/30 and different initiator dosages in the grafting process were prepared through emulsion grafting polymerization.The effects of the shell thickness of ABS and the dosage of waterborne antioxidant on the thermo-oxidative aging properties of the ABS grafting copolymers were systematically investigated.The effect of the dosage of water-based antioxidant on the mechanical performance and apparent properties of the ABS obtained from melt blending was also investigated.Meanwhile,the effects of waterborne antioxidant and shell thickness on their mechanical and ap-parent properties were studied.The results indicated that a thinner shell resulted in poorer thermo-oxidative aging perfor-mance of the ABS grafting copolymers.Both the impact strength and apparent properties of the ABS grafting copoly-mers were influenced by their shell thickness.When the addition amount of waterborne antioxidant was below 1 wt%,a higher dosage of waterborne antioxidant led to a higher the oxidation induction period and oxidation induction temperature for the ABS grafting copolymers.When 0.75 wt%waterborne antioxidant was incorporated,the heat resistance and ox-ygen aging of the ABS grafting copolymers reached a high level.The addition amount of waterborne antioxidant did not affect the mechanical properties of the ABS grafting copolymers,but influenced their apparent properties such as white-ness and yellow index significantly.
acrylonitrile-butadiene-styrene resinnuclear crust structureantioxidantoxidation induction time
国家科技期刊平台
NSTL
万方数据
维普
