Wang, Huihuan; Li, Chuan; Hou, Zhuang; Li, Bolun; Cai, Haopeng published an article in 2022, the title of the article was A phosphorus-containing imidazole derivative towards the liquid oxygen compatibility and toughness of epoxy resin.Formula: C6H11N3 And the article contains the following content:
In order to develop a liquid oxygen-compatible (LOX-compatible) matrix resins for polymer-based fiber-reinforced composites, a novel phosphorus-containing imidazole derivative called VAD containing multifunctional groups was synthesized and used as a co-curing agent for epoxy resin (EP) with simultaneous LOX-compatibility and mech. improvement. A phosphorus group was introduced into the EP to capture the free radicals generated during the pyrolysis of the polymer to improve LOX compatibility, and the trimethylene group was introduced as a flexible spacer to enhance the toughness of the cured material. In comparison to pure EP, the modified EP with only 2.5 wt% VAD showed excellent mech. properties with 23.0% and 75.6% increase in tensile and impact strength, resp. Furthermore, as the content of VAD increased, a thermoset compatible with LOX (according to the liquid oxygen impact test) was obtained, and the flame retardancy was improved (according to the limiting oxygen index test). However, there was no significant sacrifice of transparency or thermal stability. In addition, the LOX compatibility mechanism was analyzed using XPS. As an efficient multi-functional modifier, VAD has a bright future in the modification realm of EP materials. The experimental process involved the reaction of N-(3-Aminopropyl)-imidazole(cas: 5036-48-6).Formula: C6H11N3
The Article related to phosphorus containing imidazole derivative epoxy resin liquid oxygen compatibility, Plastics Manufacture and Processing: Formulating Procedures and Compositions and other aspects.Formula: C6H11N3
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem