三氧化二锑对尼龙阻燃性能的影响研究发展动态

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Abstract In recent year, nylon (PA) is widely used in people's daily lives. With the rapid development of electronics, aerospace and other special industries, the usage environment of PA is becoming stricter and stricter. Therefore, the overall performances specially the flame retardant performance of PA need to be improved and how to improve the flame retardancy of PA6 is attracting more and more attention. It is important that the flame retardancy should be improved without loss in mechanical performance. At present, the flame retardancy of PA is mainly be achieved by incorporating two types of flame retardants: (Ⅰ) additive flame retardants; (Ⅱ) reactive flame retardants. Among the various additive flame retardants for PA, such as: halogen-containing flame retardants, phosphorus-containing flame retardants, nitrogen-containing flame retardants and inorganic flame retardants, etc., the halogen-containing flame retardants show high flame retardancy, but bring pollution to the environment. The dosage of metal hydroxide is generally high and will cause loss in mechanical properties. For phosphorus-containing and nitrogen-containing flame retardants, the complex preparation process and the poor compatibility with polymer matrix have to be considered. Therefore, it is necessary to develop novel flame retardants with high efficiency, little pollution and low toxicity.
With the increasing attention to environmental protection, inorganic flame retardants are widely used to improve the flame retardancy of polymer materials due to their low pollution, low toxicity, good smoke suppression effect. As one of the most important and abundant inorganic fillers, antimony trioxide (Sb₂O₃) has been employed as flame retardants for polymer materials due to their special structure and composition. Besides, Sb₂O₃ can be incorporated into polymer materials together with other flame retardant as a synergist, widely used in plastic products, rubber and other polymer materials specially PA materials. In order to further improve the flame retardancy of PA materials, various Sb₂O₃ have been prepared by different methods and introduced into the PA system. The flame retardant mechanisms of the prepared PA/Sb₂O₃ composites are also explored.
In this paper, the structure of Sb₂O₃ is firstly introduced. Several common preparation methods, including template method, chemical reduction method, hydrothermal method and precipitation method, are listed and compared. On this basis, the application of Sb₂O₃ as flame retardant additives in PA is emphatically described. According to the recent studies on flame retardant PA6/Sb₂O₃ composites, it is pointed out that the deve-lopment trend of Sb₂O₃ in PA6 mainly includes: (Ⅰ) reducing the amount of Sb₂O₃ by refining the particle size; (Ⅱ) improving the compatibility of Sb₂O₃ with polymer matrix through surface modification; (Ⅲ) compounding with halogen-free flame retardant; (Ⅳ) hybridization with other inorganic flame retardants.

Key words： antimony troixide flame retardancy polyamide

Published: 16 July 2021

CLC number:

TQ314

About author:: Ji Sun received her B.S. degree in college of Chemistry and Chemical Engineering from Huanggang Normal University in 2020. She is pursuing her research work on flame retardant polymer nanocomposites under the supervision of Prof. Wentao He.Wentao He is currently a full professor in the College of Chemistry and Chemical Engineering at Huanggang Normal University, China. She received her Ph. D. degree in the College of Chemistry and Molecular Science at Wuhan University, China, in 2010, and then moved to National Engineering Research Center for Compounding and Modification of Polymeric Materials as an associate professor and became a full professor in 2015. She was invited to Centre for Future Materials in University of Southern Queensland in Australia to work as a visiting scholar for six months. Her research interests focus on the structure and properties of polymer nanocomposites and flame retardant polymer nanocomposites.

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SUN Ji,HE Wentao. Research Progress of the Influence of Antimony Troixide on the Flame Retardant Properties of Nylon[J]. Materials Reports, 2021, 35(Z1): 560-565.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2021/V35/IZ1/560

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