Functionalized magnesium hydroxide with zinc borate and 3‐aminopropyltriethoxysilane for enhanced flame retardant and smoke suppressant properties of epoxy resins

To improve the fire safety of epoxy resins (EP), a composite with magnesium hydroxide loaded zinc borate (MH@ZBO) was obtained using a heterogeneous deposition method, and then 3‐aminopropyltriethoxysilane (APES) was grafted onto the surface of MH@ZBO to produce an organic–inorganic hybrid (MH@ZBO‐A...

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Bibliographic Details
Published in:Journal of applied polymer science 2023-06, Vol.140 (23), p.n/a
Main Authors: Li, Ping, Li, Lijuan, Ji, Lianmin, Dang, Li, Lan, Shengjie, Zhu, Donghai
Format: Article
Language:English
Subjects:
3‐aminopropyltriethoxysilane
Aminopropyltriethoxysilane
Barriers
Decomposition
epoxy resin
Epoxy resins
Fire protection
Fire safety
Flame retardants
Glass transition temperature
Magnesium hydroxide
Materials science
Polymers
Smoke
Thermal decomposition
Thermal stability
Thermodynamic properties
Vapor phases
Water vapor
Zinc borate
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Summary:To improve the fire safety of epoxy resins (EP), a composite with magnesium hydroxide loaded zinc borate (MH@ZBO) was obtained using a heterogeneous deposition method, and then 3‐aminopropyltriethoxysilane (APES) was grafted onto the surface of MH@ZBO to produce an organic–inorganic hybrid (MH@ZBO‐APES). Subsequently, the EP composite with added MH@ZBO‐APES was prepared and its thermal properties and fire safety were evaluated. The results showed that the glass transition temperatures of the EP/MH@30ZBO‐10APES composite are improved, and the maximum thermal decomposition rate decreased, and the samples exhibited favorable thermal stability and flame‐retarding performance (flame retardancy index: 2.40; LOI: 33%). The enhanced fire safety was a result of two factors. On one hand, the endothermic decomposition of MH and ZBO and the physical barrier of their decomposition products, the catalytic carbonization function of ZBO, the synergistic flame retardation of APES, and its improvement in dispersion to form a denser carbon layer, which plays a role in fire retardation and smoke suppression in the condensed phase. On the other hand, water vapor produced by the decomposition of MH and ZBO, as well as incombustible gas produced by the degradation of APES, are vital in the gas phase. Functionalized magnesium hydroxide with zinc borate and 3‐aminopropyltriethoxysilane improves the fire safety of epoxy resins.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.53941