Effect of weathering in RTV-silicone rubber/polyurethane binary blend system in the presence of grafting agent

IF 1.5 4区化学 Q4 POLYMER SCIENCE

Journal of Rubber Research Pub Date : 2025-07-20 DOI:10.1007/s42464-025-00314-5

Shaymaa J. Ahmed, Jawad K. Oleiwi, Qahtan A. Hamad

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Abstract

This study examines the influence of accelerated weathering on the mechanical properties of grafted binary blend (Room Temperature Vulcanized Silicone Rubber (RTV-SIR)/polyurethane Rubber (PUR) intended for prosthetic feet. Employing an accelerated weathering environment replicating natural conditions, encompassing UV radiation, condensation, and water spray, the samples produced by the vacuum desiccator were exposed for a duration of 100 h. Grafted binary blend samples of (PUR) with (10, 20, and 30 wt.% RTV-SIR) blended to achieve different properties to use for prosthetic foot, using 0.1% of Tetraethoxysilane (TEOS) as a coupling agent to enhance compatibility between components. To compare, mechanical tests characterised tensile, tear, compression, and hardness properties of weathered and unweather samples. Fourier-transform infrared spectroscopy (FTIR) also analysed the efficiency of the TEOS treatment of binary rubber blend samples. Field emission-scanning electron microscopy (FE-SEM) was employed to investigate the morphology and interfacial adhesion between the components. The findings illustrate increased mechanical properties with weathering exposure, and FESEM showed better interfacial adhesion between blend components for (10–20 wt. % RTV-SIR). This work proves that the binary rubber blend was more resistant to accelerated weathering than its components and is compatible with a weight ratio of less than 30% of RTV-SIR.

Graphical Abstract

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接枝剂对rtv -硅橡胶/聚氨酯二元共混体系老化的影响

本研究考察了加速风化对用于假肢脚的接枝二元共混物(室温硫化硅橡胶(RTV-SIR)/聚氨酯橡胶（PUR）的机械性能的影响。采用模拟自然条件的加速风化环境，包括紫外线辐射、冷凝和水喷雾，真空干燥器产生的样品暴露100小时。（PUR）与（10、20和30 wt.% RTV-SIR）混合的接枝二元共混样品获得不同的性能用于假肢足，使用0.1%的四乙氧基硅烷（TEOS）作为偶联剂以增强组分之间的相容性。为了进行比较，机械测试表征了风化和非风化样品的拉伸、撕裂、压缩和硬度特性。傅里叶变换红外光谱（FTIR）还分析了二元橡胶共混样品的TEOS处理效率。采用场发射扫描电镜（FE-SEM）研究了组分之间的形貌和界面粘附性。研究结果表明，风化暴露增加了机械性能，FESEM显示（10-20 wt. % RTV-SIR）的共混组分之间的界面附着力更好。本工作证明，二元橡胶共混物比其组分具有更强的抗加速风化性，并且与RTV-SIR的重量比小于30%兼容。图形抽象

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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.