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Facile Synthesis of Alkali Metal Polyhedral Oligomeric Silsesquioxane Salt and Its Application in Flame-Retardant Epoxy Resins AITranslate

Wenyuan Zhang; Zijian Zheng; Mingyuan Zhang; Fan Yang; Wenchao Zhang; Xiaolu Wu; Rongjie Yang;
Beijing Institute of Technology; Beijing Institute of Technology; University of Science and Technology Beijing; Beijing Institute of Technology; Beijing Institute of Technology; Beijing Institute of Technology; Beijing Institute of Technology
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Publisher: ACS
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Abstract AITranslate

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, 1H, 13C, 29Si 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.

KeyWords AITranslate

polyhedral oligomeric silsesquioxane epoxy resins flame retardant mechanism peak heat release rate phosphoric triamide
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DOI：https://doi.org/10.1021/acsapm.3c00458

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Citation Information:

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, 1H, 13C, 29Si 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.

quote

GB/T 7714-2015 [1] Wenyuan Zhang, Zijian Zheng, Mingyuan Zhang, et al. ACS Applied Polymer Materials, 2023(5). DOI:10.1021/acsapm.3c00458.
MLA [1] Wenyuan Zhang, et al., ACS Applied Polymer Materials, no. 5, 2023, https://doi.org/10.1021/acsapm.3c00458.
APA [1] Wenyuan Zhang, Zijian Zheng, Mingyuan Zhang, Fan Yang, Wenchao Zhang, Xiaolu Wu, & Rongjie Yang. (2023). ACS Applied Polymer Materials(5). https://doi.org/10.1021/acsapm.3c00458
IEEE [1] Wenyuan Zhang, Zijian Zheng, Mingyuan Zhang, Fan Yang, Wenchao Zhang, Xiaolu Wu, and Rongjie Yang, ACS Applied Polymer Materials, no. 5, 2023, doi: 10.1021/acsapm.3c00458. keywords: {polyhedral oligomeric silsesquioxane;epoxy resins;flame retardant mechanism;peak heat release rate;phosphoric triamide}