Effect of Different Contents of Zinc Borate and Mg-Al Hydrotalcite on Flame Retardancy of Silicone Rubber Foams

被引：0

作者：

Deng J. ^{[1
,2
]}

Li H. ^{[1
,2
]}

Kang F. ^{[1
,2
]}

机构：

[1] College of Safety and Engineer, Xi'an University of Science and Technology, Xi'an

[2] Key Lab of Coal Fire Disaster Prevention in Shaanxi Province, Xi'an

来源：

Deng, Jun (dengj518@xust.edu.cn) | 1600年 / Sichuan University卷 / 36期

关键词：

Flame retardancy; Limiting oxygen index; Mechanical properties; Silicone foam; Smoke suppression properties;

D O I：

10.16865/j.cnki.1000-7555.2020.0284

中图分类号：

学科分类号：

摘要：

The flame retardant silicone rubber foams (SiF) with zinc borate (ZB) and hydrotalcite (LDH) as flame retardant were prepared through dehydrogenation at room temperature. The flame retardance, smoke suppression, mechanical properties, and thermal stability of SiF with ZB and LDH were investigated through the limiting oxygen index (LOI), UL-94 test, cone calorimeter, thermogravimetry, and smoke density test. The results show that the flame retardant and smoke suppression properties, mechanical properties and thermal stability of SiF are improved obviously. With 2% ZB and 1% LDH, the SiF composite achieves the UL-94 V-0 rating, and has an LOI value of 31.4%. And the heat release rate (HRR) and total heat release (THR) of SiF with 2% ZB and 1% LDH are decreased by 22.2% and 30.4%, respectively. The smoke density test results show the maximum smoke density (MSD) and smoke density rating (SDR) are decreased with the addition of ZB and LDH. In addition, the tensile strength and elongation at break of the SiF composite with 2% ZB and 1% LDH are increased by 57.9% and 44.8%, respectively. After adding ZB and LDH, SiF composites have good thermal stability and denser carbon layer. Considering comprehensively, the SiF composite with 2% ZB and 1% LDH exhibits excellent comprehensive properties in flame retardant, thermal stability and mechanical properties. © 2020, Editorial Board of Polymer Materials Science & Engineering. All right reserved.

引用

页码：42 / 48

页数：6

共 12 条

[1]

Hamdani S, Longuet C, Perrin D, Et al., Flame retardancy of silicone-based materials, Polymer Degradation and Stability, 94, pp. 465-495, (2009)

[2]

pp. 1-3, (2011)

[3]

Zhang F, Chen P, Wang Y, Et al., Smoke suppression and synergistic flame retardancy properties of zinc borate and diantimony trioxide in epoxy-based intumescent fire-retardant coating, Journal of Thermal Analysis and Calorimetry, 123, pp. 1319-1327, (2016)

[4]

Ge X G, Liu W, Yin C L, Et al., Effect of non-halogenated flame retardants on properties of ceramizable silicone rubber-based composites, Fire Science and Technology, 37, 8, pp. 114-116, (2018)

[5]

Ji C, Li S X, Liu K, Et al., Influences of flame retardant and smoke suppression agents on burning characteristics of intumescent fire-retardant coating, Electroplating & Finishing, 34, 14, pp. 781-786, (2015)

[6]

Wu Y N., Effect of zinc borate on smoke properties regularity of the expandable fire retardant coating, (2018)

[7]

Liu C W, Zhang H X, Hao D K, Et al., Preparation and properties of flame retardant silicone rubber with magnesium hydroxide and hydrotalcite, Guangzhou Chemical Industry, 46, 21, pp. 54-56, (2018)

[8]

Becker C M, Gabbardo A D, Wypych F, Et al., Mechanical and flame-retardant properties of epoxy/Mg-Al LDH composites, Composites Part A: Applied Science and Manufacturing, 42, pp. 196-202, (2011)

[9]

Genovese A, Shanks R A., Fire performance of poly(dimethyl siloxane) composites evaluated by cone calorimetry, Composites Part A: Applied Science and Manufacturing, 39, pp. 398-405, (2008)

[10]

Deng J, Kang F R, Xiao Y, Et al., Effects of platinum compounds superfine aluminum hydroxide/ultrafine calcium carbonate on the flame retardation and smoke suppression of silicone foams, Journal of Applied Polymer Science, 53, pp. 401-407, (2019)

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