Effects of structure of ABS powder and antioxidant dosage on properties of ABS resin

doi:10.19491/j.issn.1001-9278.2024.05.016

Abstract

Abstract:

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 apparent properties were studied. The results indicated that a thinner shell resulted in poorer thermo⁃oxidative aging performance of the ABS grafting copolymers. Both the impact strength and apparent properties of the ABS grafting copolymers 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 oxygen 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 whiteness and yellow index significantly.

Key words: acrylonitrile?butadiene?styrene resin, nuclear crust structure, antioxidant, oxidation induction time

CLC Number:

TQ327

SONG Zirui, LIU Baijun, ZHANG Mingyao. Effects of structure of ABS powder and antioxidant dosage on properties of ABS resin[J]. China Plastics, 2024, 38(5): 88-93.

Figures/Tables 11

Fig.1. Action mechanism of aqueous antioxidants on ABS resin

Fig.2. Particle size distribution of the samples

Fig.3. Effect of core⁃shell ratio of ABS graft copolymer on oxidation induction time of ABS graft copolymer

Fig.4. Effect of ABS graft copolymer core⁃shell ratio on oxidation induction temperature of ABS graft copolymers

Fig.5. Effect of initiator dosage on oxidation induction time of ABS graft copolymers

Fig.6. Effect of initiator dosage on oxidation induction temperature of ABS graft copolymers

Fig.7. Photo of the samples

Fig.8. Properties of ABS resins prepared with different initiator additions

Fig.9. Oxidation induction time curves of ABS graft copolymers with different antioxidant dosages

Fig.10. Oxidation induction temperature curves of ABS graft copolymers with different antioxidant dosages

Fig.11. Mechanical properties and apparent properties of ABS resins with different antioxidant dosages

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