The preparation of highly compatible polydimethylsiloxane/epoxy system has been a challenging task. Here, we designed and synthesized a vinyl-containing bifunctional epoxy resin, which was chemically bonded with polydimethylsiloxane by hydrosilylation. A silicone-epoxy block hybrid network with restricted micromorphology and outstanding macro-performance was formed. The phase separation scale of polydimethylsiloxane/epoxy system was strictly restricted by molecular structure design and the modified PDMS was transparent. The mechanical test results showed that the tensile strength, elongation at break and shear strength of the hybrid material were increased by 391%, 78% and 292% respectively. More importantly, the initial thermal decomposition temperature of the hybrid material increased, and its thermal residue at 800 °C was kept at a high level. All these results indicate that we have prepared a transparent, high-performance polydimethylsiloxane material, which is expected to be applied in many prospects such as heat resistant adhesive and transparent surface coating.

高度相容的聚二甲基硅氧烷/环氧体系的制备一直是一项艰巨的任务。在这里，我们设计并合成了一种含乙烯基的双官能环氧树脂，该环氧树脂通过氢化硅烷化与聚二甲基硅氧烷化学键合。形成了具有受限的微观形态和出色的宏观性能的有机硅-环氧树脂嵌段混合网络。分子结构设计严格限制了聚二甲基硅氧烷/环氧树脂体系的相分离规模，改性的PDMS是透明的。力学测试结果表明，杂化材料的抗拉强度，断裂伸长率和剪切强度分别提高了391％，78％和292％。更重要的是，杂化材料的初始热分解温度升高，并且其在800℃下的热残留保持在较高水平。