Preparation and enhanced aging resistance of methyl vinyl silicone rubber/g-opal@CeOx modified by thiol-ene click chemistry

IF 1.5 4区化学 Q4 POLYMER SCIENCE

Journal of Rubber Research Pub Date : 2025-07-30 DOI:10.1007/s42464-025-00312-7

Yuhang Ma, Tengfei Shao, Zhiqing Liu, Weijun Zhen

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引用次数: 0

Abstract

Methyl vinyl silicone rubber (MVQ) suffers from intrinsic mechanical weakness and environmental aging. To address these issues, we developed grafted-opal@CeOx (g-opal@CeOx) via thiol-ene click chemistry, integrating interfacial compatibility enhancement with CeOx-based anti-aging functionality. The Kissinger method was used to calculate the average apparent activation energy of crosslinking reactions. The Mooney viscosity values, viscoelasticity analysis and molecular dynamics simulation results demonstrated that g-opal@CeOx enhanced the interfacial compatibility between MVQ and opal. After adding 12 g of g-opal@CeOx, the tear strength increased by 3.1 times compared to MVQ and the tensile strength was 2.16 times that of MVQ. Molecular dynamics simulations quantitatively confirmed strengthened interfacial interactions between MVQ and g-opal@CeOx. The UV aging test showed that MVQ was mainly crosslinked in the early stage of aging, and mainly hydrolyzed and broken in the later stage. Adding g-opal@CeOx to MVQ reduced the percentage of tensile strength loss from 23.5% to 10.4% and only reduced the contact angle by 7°. The thermal-oxidative aging kinetic analysis showed that g-opal@CeOx extended the lifespan of MVQ in thermal oxidation environments.

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巯基化学改性甲基乙烯基硅橡胶/g-opal@CeOx的制备及耐老化性能的提高

甲基乙烯基硅橡胶（MVQ）存在固有的机械缺陷和环境老化问题。为了解决这些问题，我们通过巯基点击化学开发了grafted-opal@CeOx (g-opal@CeOx)，将界面兼容性增强与基于ceox的抗衰老功能集成在一起。采用Kissinger法计算交联反应的平均表观活化能。Mooney黏度值、粘弹性分析和分子动力学模拟结果表明，g-opal@CeOx增强了MVQ与蛋白石的界面相容性。加入12 g g-opal@CeOx后，撕裂强度比MVQ提高了3.1倍，拉伸强度是MVQ的2.16倍。分子动力学模拟定量证实了MVQ与g-opal@CeOx之间增强的界面相互作用。紫外老化试验表明，MVQ在老化初期以交联为主，后期以水解破碎为主。在MVQ中加入g-opal@CeOx，拉伸强度损失率从23.5%降低到10.4%，接触角仅降低了7°。热氧化老化动力学分析表明g-opal@CeOx延长了MVQ在热氧化环境下的寿命。

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来源期刊

Journal of Rubber Research 化学-高分子科学

自引率

15.40%

发文量

审稿时长

3 months

期刊介绍： The Journal of Rubber Research is devoted to both natural and synthetic rubbers, as well as to related disciplines. The scope of the journal encompasses all aspects of rubber from the core disciplines of biology, physics and chemistry, as well as economics. As a specialised field, rubber science includes within its niche a vast potential of innovative and value-added research areas yet to be explored. This peer reviewed publication focuses on the results of active experimental research and authoritative reviews on all aspects of rubber science. The Journal of Rubber Research welcomes research on: the upstream, including crop management, crop improvement and protection, and biotechnology; the midstream, including processing and effluent management; the downstream, including rubber engineering and product design, advanced rubber technology, latex science and technology, and chemistry and materials exploratory; economics, including the economics of rubber production, consumption, and market analysis. The Journal of Rubber Research serves to build a collective knowledge base while communicating information and validating the quality of research within the discipline, and bringing together work from experts in rubber science and related disciplines. Scientists in both academia and industry involved in researching and working with all aspects of rubber will find this journal to be both source of information and a gateway for their own publications.