Related Products of 497-25-6, Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, and a compound is mentioned, 497-25-6, Oxazolidin-2-one, introducing its new discovery.
Effect of stoichiometry on the thermal stability and flame retardation of polyisocyanurate foams modified with epoxy resin
Epoxy resin modified polyisocyanurate (EP-PIR) foams were successfully prepared by the reaction of polymethylene polyphenylene isocyanate (PAPI) and diglycidyl ether of bisphenol-A (DGEBA). Thermogravimetric analysis coupled with infrared spectrometry (TGA-IR) was performed to investigate the thermostability and the gaseous pyrolysis products of EP-PIR foams. The results indicated that the excellent thermostability of EP-PIR foams was due to the abundant highly thermostable isocyanurate ring and oxazolidone ring. The flame retardation of EP-PIR foams was also investigated. UL94 results revealed that the foams with [PAPI]/[DGEBA] ratio above 2.5 could reach V-0 classification. With increasing the stoichiometry of [PAPI]/[DGEBA], the limiting oxygen index values increased linearly from 24.5 to 30.0 vol %. Scanning electron microscopy images of burned foams illustrated the flame-retardant mechanism was due to the excellent charring ability. Cone calorimeter tests showed that the peaks of heat release rate were always as low as 266.5 kW/m2. Moreover, highly thermostable isocyanurate ring played an important role in the suppression of smoke emission.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Related Products of 497-25-6. In my other articles, you can also check out more blogs about 497-25-6
Reference：
Oxazolidine – Wikipedia,
Oxazolidine | C3H423NO – PubChem