Study on effect of polydimethylsiloxane in intumescent flame retardant polypropylene |
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| Authors: | Pin Lv Zhengzhou Wang Yuan Hu Minggao Yu |
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| Affiliation: | (1) State Key Laboratory of Fire Science, University of Science and Technology of China, Anhui, 230026, People’s Republic of China;(2) School of Materials Science and Engineering, Tongji University, Shanghai, 200092, People’s Republic of China;(3) Henan Province Key Laboratory of Prevention and Cure of Mine Methane & Fires, Henan Polytechnic University, Jiaozuo, 454003, People’s Republic of China |
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| Abstract: | The effect of polydimethylsiloxane (PDMS) in intumescent flame retarded polypropylene (PP) containing melamine phosphate (MP) was studied using limiting oxygen index (LOI), UL-94 test, thermogravimetric analysis (TG), real time Fourier transform infrared (FTIR) and pyrolysis/gas chromatogram/mass spectrometry (Py–GC/MS). It was found that the addition of PDMS into the PP/MP composites leads to a decrease in the LOI values of the PP/MP/PDMS composites, and the values increase gradually with the increase of the PDMS content. The UL-94 test results indicate that the PP/MP/PDMS composite with 30% PDMS reaches the V-0 rating compared with no rating of the PP/MP composite at the same MP loading. The water resistance of the PP/MP/PDMS composites was investigated, and the improved water leaching of MP was observed. The TG and RTFTIR results illustrate the thermal stability of the PP/MP composites containing PDMS is improved. Moreover, the pyrolysis of the PP/MP/PDMS composites was studied by the Py–GC/MS method. |
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| Keywords: | Polypropylene Polydimethylsiloxane Melamine phosphate Flame retardant Thermal degradation |
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