

FOLLOWUS
a.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
b.Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030032, China
c.Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310058, China
liufuyong@tyut.edu.cn (F.Y.L.)
zhengqiang@zju.edu.cn (Q.Z.)
Received:04 December 2023,
Revised:2024-02-28,
Accepted:11 March 2024,
Online First:25 April 2024,
Published:01 August 2024
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Ping, X. F.; Wang, Y.; Liu, L.; Liu, F. Y.; He, H. W.; Wang, P.; Yu, W. W.; Zheng, Q. Improving thermal-oxidative aging resistance of styrene-butadiene rubber by antioxidant loaded silica aerogel. Chinese J. Polym. Sci. 2024, 42, 1198–1209
Xue-Fei Ping, Yu Wang, Lu Liu, et al. Improving Thermal-oxidative Aging Resistance of Styrene-butadiene Rubber by Antioxidant Loaded Silica Aerogel[J]. Chinese Journal of Polymer Science, 2024, 42(8): 1198-1209.
Ping, X. F.; Wang, Y.; Liu, L.; Liu, F. Y.; He, H. W.; Wang, P.; Yu, W. W.; Zheng, Q. Improving thermal-oxidative aging resistance of styrene-butadiene rubber by antioxidant loaded silica aerogel. Chinese J. Polym. Sci. 2024, 42, 1198–1209 DOI: 10.1007/s10118-024-3125-5.
Xue-Fei Ping, Yu Wang, Lu Liu, et al. Improving Thermal-oxidative Aging Resistance of Styrene-butadiene Rubber by Antioxidant Loaded Silica Aerogel[J]. Chinese Journal of Polymer Science, 2024, 42(8): 1198-1209. DOI: 10.1007/s10118-024-3125-5.
In this study
composite particles (A-N) with both slow-release and reinforcing functions were obtained by loading the antioxidant into the pores of silica aerogel powders. Thermo-oxidative aging of vulcanized rubber was inhibited by continuous release of antioxidant from A-N.
The antioxidant
N
-isopropyl-
N
'-phenyl-
p
-phenylenediamine (4010NA) was dissolved in ethanol and impregnated into silica aerogel (SAG)
via
vacuum-pressure cycles
yielding composite particles (A-N) with enhanced sustained-release and reinforcing capabilities. The effect of A-N on the mechanical properties and thermal-oxidative aging resistance of styrene-butadiene rubber (SBR) vulcanizates was investigated. TGA and BET assessments indicated that the loading efficiency of 4010NA in SAG reached 14.26% within ethanol's solubility limit. Incorporating A-N into SBR vulcanizates significantly elevated tensile strength by 17.5% and elongation at break by 41.9% over those with fumed silica and free 4010NA. Furthermore
A-N notably enhanced the thermal-oxidative aging resistance of SBR. After aging for 96 h at 100 °C
the tensile strength and elongation at break of SBR with A-N sustained 70.09% and 58.61% of their initial values
respectively
with the retention rate of elongation at break being 62.8% higher
than that of SBR with fumed silica and free antioxidant. The study revealed that A-N composite particles significantly inhibited the crosslinking in SBR's molecular chains
reducing hardening and embrittlement during later thermal-oxidative aging stages.
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