制备同时具有高度坚固和坚韧性能的材料一直是一个巨大的挑战。热固性树脂作为一种广泛使用的高分子材料,没有协同的强度和韧性,限制了其在某些特殊领域的应用。在这份报告中,我们提出了一种有效的策略来制备具有协同强度和韧性的热固性树脂。在这种方法中,首先制备了具有动态半缩醛键的软硬微球,然后热压在界面处交联。具体来说,通过沉淀聚合制备刚性或柔性微球。热压后,所得的刚软混合材料同时具有优异的强度和韧性。与前体刚性或柔性材料相比,刚软共混膜(RSBF)的韧性分别提高到240%和2100%,分别,而强度与刚性前体相当。与传统的破碎相比,混合,并对刚性或软质材料进行热压以获得不均匀的材料,刚软共混膜的强度和韧性分别提高到168%和255%,分别。这种方法对于制造具有强度和韧性的独特组合的聚合物热固性材料具有重要的前景。本文受版权保护。保留所有权利。
Preparation of materials that possess highly strong and tough properties simultaneously is a great challenge. Thermosetting resins as a type of widely used polymeric materials without synergistic strength and toughness limit their applications in some special fields. In this report, an effective strategy to prepare thermosetting resins with synergistic strength and toughness, is presented. In this method, the soft and rigid microspheres with dynamic hemiaminal bonds are fabricated first, followed by hot-pressing to crosslink at the interfaces. Specifically, the rigid or soft microspheres are prepared via precipitation polymerization. After hot-pressing, the resulting rigid-soft blending materials exhibit superior strength and toughness, simultaneously. As compared with the precursor rigid or soft materials, the toughness of the rigid-soft blending films (RSBFs) is improved to 240% and 2100%, respectively, while the strength is comparable to the rigid precursor. As compared with the traditional crushing, blending, and hot-pressing of rigid or soft materials to get the nonuniform materials, the strength and toughness of the RSBFs are improved to 168% and 255%, respectively. This approach holds significant promise for the fabrication of polymer thermosets with a unique combination of strength and toughness.