Synthesis and characterization of silicone polyurea and mechanical properties improvement through interfacial reaction

作者：Yanru Chen, Ke Yang, Hanhai Dong, Hongyu Niu, Quanguo Wang, Qingli Cheng · 发表于：RSC Advances · 年份：2025 · DOI：10.1039/d5ra00331h · 被引用次数：4 · 研究领域：Structural Response to Dynamic Loads、Polymer composites and self-healing、Marine Biology and Environmental Chemistry

-maleic anhydride) (PBAM) and γ-aminopropyl triethoxysilane (KH550) which are capable of interfacial reactions were respectively introduced into polyurea and siloxane segments to reduce the degree of microphase separation and enhance the mechanical properties of silicone polyurea. The mechanism behind the improvement was elucidated through experimental results. FT-IR spectra confirmed that the maleic anhydride groups in PBAM and the amino groups in KH550 undergo rapid reactions. Additionally, it was observed that the rapid interaction of PBAM and KH550 at the interface made interfacial tension decrease fast through the pendant-drop method. Stability analysis and light microscope observations revealed that PBAM and KH550 can stabilize the two-phase interface, forming stable droplets within the mixture. Scanning electron microscopy (SEM) observations indicated a reduction in the degree of microphase separation in the silicone polyurea. Consequently, the introduction of PBAM and KH550 decreases interfacial tension and the dispersion size of the silicone phase within the carbon phase, thereby reducing the degree of microphase separation and enhancing the mechanical properties of the silicone polyurea.