Study on the Flame Retardancy and Thermal Decomposition Properties of RTV-2 Silicone Rubber Foam Containing Inorganic Flame Retardant
MA Li1,2, LIU Zhichao1,2, XIAO Yang1,2, KANG Furu1,2, YANG Kun1,2, DENG Jun1,2
1 College of Safety and Engineer, Xi’an University of Science and Technology, Xi’an 710054
2 Key Lab of Coal Fire Disaster Prevention in Shanxi Province, Xi’an 710054
Abstract: For the sake of preparing room temperature vulcanized silicone foam (SRF) with excellent flame retardancy, the flame retardant effects of inorganic flame retardants on SRF was studied. First, the SRF with maximum limit oxygen index(LOI) was selected by orthogonal experiment L9(34), and then the SRF composites were prepared by adding magnesium hydro-xide (MH), calcium carbonate (CC), and aluminum hydroxide (ATH), respectively. Then, the limit oxygen index instrument, smoke density tester and synchronous thermal analyzer were employed to test and analyze, and the apparent activation energy was calculated by the Coats-Redfern and Achar methods. The results revealed that the LOI of the SRF was 29.5%, the oxygen index increased after adding the inorganic flame retardant. Among them, the SRF composites with 30wt% ATH showed highest LOI of 34.9%. The smoke density decreased after adding the inorganic flame retardants, the smoke density decreased, and ATH exhibited best smoke inhibition. Both MH and ATH could contributed to enhance the thermal stability of SRF. When the addition amount of MH and ATH addition were both 20wt%, the mass residual rate was increased by 16.5% and 15.2%, respectively. Whereas, after adding 30wt% CC, the mass residual rate decreased by 4.7%, accompanied by decrease of the thermal stability. The greater the activation energy brought bout stronger flame retardancy. MH and ATH presented obvious flame retardancy at both the low temperature stage and the high temperature stage, while CC worked more effectively at the high temperature stage. The results indicated that ATH was the best flame retardant for SRF.
马砺, 刘志超, 肖旸, 康付如, 杨昆, 邓军. 含无机阻燃剂硅橡胶泡沫的阻燃及热分解特性研究[J]. 材料导报, 2019, 33(11): 1836-1841.
MA Li, LIU Zhichao, XIAO Yang, KANG Furu, YANG Kun, DENG Jun. Study on the Flame Retardancy and Thermal Decomposition Properties of RTV-2 Silicone Rubber Foam Containing Inorganic Flame Retardant. Materials Reports, 2019, 33(11): 1836-1841.
1 Chen D Z, Liu Y, Huang C. Polymer Degradation and Stability,2012,97(3),308. 2 Labouriau A, Cox J D, Schoonover J R, et al. Polymer Degradation & Stability,2007,92(3),414. 3 文闽军,王瑞婷.中国专利,CN102516770A,2012. 4 Tan S. Research on preparrtion and properties of low density and flame retardant silicone rubber foam. Master’s Thesis, Qingdao University of Science and Technology, China,2011(in Chinese). 谭珊.低密度阻燃硅橡胶泡沫的制备与性能研究.硕士学位论文,青岛科技大学,2017. 5 Huang S. Preparation of environment-friendly flame retardant silicone rubber sponge material. Master’s Thesis, South China University of Techno-logy, China,2003(in Chinese). 黄珊.环保型阻燃硅橡胶海绵材料的制备.硕士学位论文,华南理工大学,2003. 6 Nicholson W R, Rapson L J, Shephard K L.U.S. Patent US6084002,2000. 7 Wu Y, Zhu Q, Wang X H, et al. Polymer Materials Science & Enginee-ring,2016,32(3),54(in Chinese). 吴勇,朱靖,汪小憨,等.高分子材料科学与工程,2016,32(3),54. 8 Pan D H, Liu M. Silicone Material,2004(3),10(in Chinese). 潘大海,刘梅.有机硅材料,2004(3),10. 9 Zhu C, Deng C, Cao J Y, et al. Polymer Degradation & Stability,2015,121,42. 10 Wang G C, Lu Z Y, Hu X P, et al. Materials Review,2007,21(2),47(in Chinese). 汪关才,卢忠远,胡小平,等.材料导报,2007,21(2),47. 11 Chen X, Li M, Zhuo J, et al. Journal of Thermal Analysis & Calorimetry,2016,123(1).439. 12 Yang Y X, Li Y C, Wang P, et al. Engineering Plastics Application,2016,44(2),124(in Chinese). 杨业昕,李迎春,王盼,等.工程塑料应用,2016,44(2),124. 13 Ai G J, Ma W S,Wang H Z. China Rubber Industry,2007,54(5),279(in Chinese). 艾国金,马文石,王惠祖.橡胶工业,2007,54(5),279. 14 Hu R Z, Shi Q Z. Thermal analysis kinetics, Science press, China,2001(in Chinese). 胡荣祖,史启祯.热分析动力学,科学出版社,2001. 15 Lin H, Han L, Dong L. Journal of Applied Polymer Science,2014,131(13),378.