Improving Thermal-oxidative Aging Resistance of Styrene-butadiene Rubber by Antioxidant Loaded Silica Aerogel

IF 4.1 2区化学 Q2 POLYMER SCIENCE Chinese Journal of Polymer Science Pub Date : 2024-04-25 DOI:10.1007/s10118-024-3125-5

Xue-Fei Ping, Yu Wang, Lu Liu, Fu-Yong Liu, Hong-Wei He, Pi Wang, Wen-Wen Yu, Qiang Zheng

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Abstract

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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通过添加抗氧化剂的二氧化硅气凝胶提高丁苯橡胶的耐热氧化老化性能

将抗氧化剂 N-异丙基-N′-苯基-对苯二胺（4010NA）溶解在乙醇中，通过真空-加压循环浸渍到二氧化硅气凝胶（SAG）中，得到了具有更强缓释和补强能力的复合颗粒（A-N）。研究了 A-N 对丁苯橡胶（SBR）硫化胶的机械性能和耐热氧化老化性能的影响。TGA 和 BET 评估表明，在乙醇的溶解极限范围内，4010NA 在 SAG 中的负载效率达到 14.26%。与气相法二氧化硅和游离 4010NA 相比，在 SBR 硫化物中加入 A-N 可显著提高拉伸强度 17.5%，断裂伸长率 41.9%。此外，A-N 还显著增强了 SBR 的耐热氧化老化性。在 100 ℃ 下老化 96 h 后，添加了 A-N 的 SBR 的拉伸强度和断裂伸长率分别保持了初始值的 70.09% 和 58.61%，断裂伸长率保持率比添加气相二氧化硅和游离抗氧化剂的 SBR 高 62.8%。研究结果表明，A-N 复合颗粒能显著抑制丁苯橡胶分子链的交联，降低后期热氧化老化阶段的硬化和脆化。

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来源期刊

Chinese Journal of Polymer Science 化学-高分子科学

CiteScore

7.10

自引率

11.60%

发文量

218

审稿时长

6.0 months

期刊介绍： Chinese Journal of Polymer Science (CJPS) is a monthly journal published in English and sponsored by the Chinese Chemical Society and the Institute of Chemistry, Chinese Academy of Sciences. CJPS is edited by a distinguished Editorial Board headed by Professor Qi-Feng Zhou and supported by an International Advisory Board in which many famous active polymer scientists all over the world are included. The journal was first published in 1983 under the title Polymer Communications and has the current name since 1985. CJPS is a peer-reviewed journal dedicated to the timely publication of original research ideas and results in the field of polymer science. The issues may carry regular papers, rapid communications and notes as well as feature articles. As a leading polymer journal in China published in English, CJPS reflects the new achievements obtained in various laboratories of China, CJPS also includes papers submitted by scientists of different countries and regions outside of China, reflecting the international nature of the journal.