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Article

Synthesis and Application of Arylaminophosphazene as a Flame Retardant and Catalyst for the Polymerization of Benzoxazines

1
Mendeleev University of Chemical Technology of Russia, 125047 Moscow, Russia
2
Prepreg-ACM JSC (Part of UMATEX, Rosatom State Corporation), 109316 Moscow, Russia
3
NPK Khimprominzhiniring, JSC (Part of UMATEX, Rosatom State Corporation), 109316 Moscow, Russia
*
Author to whom correspondence should be addressed.
Polymers 2021, 13(2), 263; https://doi.org/10.3390/polym13020263
Received: 24 December 2020 / Revised: 8 January 2021 / Accepted: 10 January 2021 / Published: 14 January 2021
A novel type of phosphazene containing an additive that acts both as a catalyst and as a flame retardant for benzoxazine binders is presented in this study. The synthesis of a derivative of hexachlorocyclotriphosphazene (HCP) and meta-toluidine was carried out in the medium of the latter, which made it possible to achieve the complete substitution of chlorine atoms in the initial HCP. Thermal and flammability characteristics of modified compositions were investigated. The modifier catalyzes the process of curing and shifts the beginning of reaction from 222.0 °C for pure benzoxazine to 205.9 °C for composition with 10 phr of modifier. The additive decreases the glass transition temperature of compositions. Achievement of the highest category of flame resistance (V-0 in accordance with UL-94) is ensured both by increasing the content of phenyl residues in the composition and by the synergistic effect of phosphorus and nitrogen. A brief study of the curing kinetics disclosed the complex nature of the reaction. An accurate two-step model is obtained using the extended Prout–Tompkins equation for both steps. View Full-Text
Keywords: benzoxazines; phosphazenes; curing kinetics; flammability; flame retardant; catalysis; m-toluidine benzoxazines; phosphazenes; curing kinetics; flammability; flame retardant; catalysis; m-toluidine
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MDPI and ACS Style

Bornosuz, N.V.; Gorbunova, I.Y.; Kireev, V.V.; Bilichenko, Y.V.; Chursova, L.V.; Svistunov, Y.S.; Onuchin, D.V.; Shutov, V.V.; Petrakova, V.V.; Kolenchenko, A.A.; Nguyen, D.T.; Pavlov, N.V.; Orlov, A.V.; Grebeneva, T.A.; Sirotin, I.S. Synthesis and Application of Arylaminophosphazene as a Flame Retardant and Catalyst for the Polymerization of Benzoxazines. Polymers 2021, 13, 263. https://doi.org/10.3390/polym13020263

AMA Style

Bornosuz NV, Gorbunova IY, Kireev VV, Bilichenko YV, Chursova LV, Svistunov YS, Onuchin DV, Shutov VV, Petrakova VV, Kolenchenko AA, Nguyen DT, Pavlov NV, Orlov AV, Grebeneva TA, Sirotin IS. Synthesis and Application of Arylaminophosphazene as a Flame Retardant and Catalyst for the Polymerization of Benzoxazines. Polymers. 2021; 13(2):263. https://doi.org/10.3390/polym13020263

Chicago/Turabian Style

Bornosuz, Natalia V., Irina Yu. Gorbunova, Vyacheslav V. Kireev, Yulya V. Bilichenko, Larisa V. Chursova, Yuri S. Svistunov, Denis V. Onuchin, Vyacheslav V. Shutov, Viktoria V. Petrakova, Alexander A. Kolenchenko, Duong T. Nguyen, Nikolay V. Pavlov, Alexey V. Orlov, Tatyana A. Grebeneva, and Igor S. Sirotin. 2021. "Synthesis and Application of Arylaminophosphazene as a Flame Retardant and Catalyst for the Polymerization of Benzoxazines" Polymers 13, no. 2: 263. https://doi.org/10.3390/polym13020263

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