Facile Synthesis of Alkali Metal Polyhedral Oligomeric Silsesquioxane Salt and Its Application in Flame-Retardant Epoxy Resins
Source abstract
Abstract
A series of metal polyhedral oligomeric silsesquioxane salts (POSS-M, M = Li or Na or K) were facilely synthesized using the click reaction and neutralization reaction. The chemical structure of POSS-M was confirmed by FT-IR, 1 H, 13 C, 29 Si NMR, and XRD patterns. The well-characterized POSS-M was introduced into epoxy resins. The epoxy composites containing POSS-Na achieved the UL-94 V1 rating, and the highest LOI value also came from EP/POSS-Na, which was 27.4%. A dramatical decrease in pHRR was observed in all three composites. With 3 wt % POSS-M, the pHRR of epoxy composites dropped by up to 64.2%. Notably, compact char layers with sodium silicate on the surface were clearly observed for the first time, extending the silicon-containing flame retardant mechanism.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Silicone and Siloxane Chemistry · Flame retardant materials and properties · Synthesis and properties of polymers
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
National Engineering Technology Research Center of Flame Retardant Materials, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
Funding
Natural Science Foundation of Beijing Municipality · National Natural Science Foundation of China
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