Epoxy Vitrimer with Excellent Mechanical Properties and High for Detachable Structural Adhesives.

It is a long-standing challenge for thermoset resins to simultaneously achieve outstanding thermomechanical and mechanical properties as well as rapid network reconfiguration due to the trade-off between chemical bond transformation and stability of the network. The design of the vitrimer network topology is an effective strategy to address the above issues. Here, we prepared an epoxy vitrimer material (DGEBA-API-MHHPA) with excellent mechanical properties and high glass-transition temperature () by introducing rigid-flexible integrated side chains [1-(3-aminopropyl) imidazole (API)], which endow DGEBA-API-MHHPA multiple interactions including "internal antiplasticization" effect, intermolecular hydrogen bonds, and π-π interactions.

Effectiveness of different silicone oil remove methods after vitrectomy and light silicone oil tamponade in elderly patients.

Background: During the remove of oil from the silicone oil-filled eye after vitrectomy, perfusion fluid is often mistakenly aspirated when mechanical force is used to remove the oil. This leads to a sudden sharp drop in intraocular pressure and collapse of the eyeball, which may cause complications. The aspiration of perfusion fluid can be detected when the oil is removed manually, and the force of the hand and location of the aspiration can be adjusted to remove the silicone oil instead.