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Thermal and flame retardant properties of novel intumescent flame retardant polypropylene composites |
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| Authors: | Shibin Nie Chao Peng Shujie Yuan Mingxu Zhang |
| Institution: | 1. School of Energy Resources and Safety, Anhui University of Science and Technology, Huainan, 232001, Anhui, China 2. Key Laboratory of Integrated Coal Exploitation and Gas Extraction, Anhui University of Science and Technology, Huainan, 232001, Anhui, China 3. School of Materials Sciences and Engineering, Anhui University of Science and Technology, Huainan, 232001, Anhui, China |
| Abstract: | Novel intumescent flame retardant polypropylene (PP) composites were prepared based on a char forming agent (CFA) and silica-gel microencapsulated ammonium polyphosphate (Si-MCAPP). The thermal and flame retardancy of flame retardant PP composites were investigated by limiting oxygen index, UL-94 test, cone calorimetry, thermogravimetric analysis, scanning electron micrograph, and water resistance test. The results of cone calorimetry show that the flame retardant properties of PP with 30 wt% novel intumescent flame retardants (CFA/Si-MCAPP = 1:3) improve greatly. The peak heat release rate and total heat release decrease, respectively, from 1,140.0 to 156.8 kW m?2 and from 96.0 to 29.5 MJ m?2. The PP composite with CFA/Si-MCAPP = 1:3 has the excellent water resistance, and it can still obtain a UL-94 V-0 rating after 168 h soaking in water. |
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