Flame‐retarded polyethylene terephthalate with carbon microspheres/magnesium hydroxide compound flame retardant |
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| Authors: | Yaru Yang Mei Niu Jinming Dai Jie Bai Baoxia Xue Yinghao Song Yun Peng |
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| Affiliation: | 1. Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan, China;2. College of Textile Engineering, Taiyuan University of Technology, Yuci, China;3. School of Material Science and Engineering, Taiyuan University of Technology, Taiyuan, China |
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| Abstract: | A novel compound flame retardant (carbon microspheres/magnesium hydroxide, abbreviated as CMSs/MH) was used to improve the fire performance of polyethylene terephthalate (PET). LOI, UL94, and Cone test results showed that CMSs/MH/PET composites obtained the best fire performance at the mass ratio of CMSs to MH, which was 5:5, where the CMSs/MH content was 1.0 wt. % of PET. The Py‐CS‐MS, TGA‐DSC results, and morphology of char residue revealed the flame‐retardant mechanism. CMSs/MH increased the thermal stability of PET by increasing the activation energy at the initial combustion stage. At the second stage of combustion, CMSs/MH increased the chance of recombination of free radicals and slowed the combustion. Additionally, CMSs/MH promoted the cross‐linking of pyrolysis products and further improved the continuity of the char layer. Thus, a dense and continuous char layer of CMSs/MH/PET composites was produced; this char layer reduced the heat release rate and increased the amount of char residue. |
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| Keywords: | carbon microspheres composites flame retardant magnesium hydroxide polyethylene terephthalate |
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