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Li JL, Gao CT, Sun X, Peng SG, Wang YW, Qin SH. Synergistic Flame-Retardant Effect of Aluminum Diethyl Phosphinate in PP/IFR System and the Flame-Retardant Mechanism. INT POLYM PROC 2021. [DOI: 10.1515/ipp-2020-4082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Synergistic flame-retardant effect of aluminum diethyl phosphinate (AlPi) in intumescent flame retardant polypropylene (PP/IFR) system and the flame-retardant mechanism were investigated. The flame retardancy of PP/IFR/AlPi (the mass ratio of IFR to AlPi is 2 : 1) was the best, which was proved by the results of the limiting oxygen index (LOI) test, UL-94 test, and cone calorimeter test ( CCT) test. Here, the LOI value of the sample was as high as 34% and passed the V–0 rating in UL–94 test. The peak heat release rate (PHRR) decreased by 92.57%, the total heat release (THR) reduced by 90.52%. Thermogravimetric (TGA) data showed that the introduction of AlPi improved thermal stability and changed the thermal degradation behavior of PP/IFR composites. Interestingly, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDXS) and laser Raman spectroscopy (LRS) proved that PP/IFR/AlPi had formed more residual carbon, but the flame retardancy was worse than PP/IFR/AlPi. This is because when the mass ratio of IFR to AlPi is 2 : 1, the synergy between IFR and AlPi was significant, gas-phase flame retardant and condensed-phase flame retardant reached a balance and obtained the best flame retardant effect.
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Affiliation(s)
- J.-L. Li
- College of Materials Science and Metallurgy Engineering, Guizhou University , Guiyang , PRC
| | - C.-T. Gao
- College of Materials Science and Metallurgy Engineering, Guizhou University , Guiyang , PRC
- National Engineering Research Center for Compounding and Modification of Polymeric Materials , Guiyang , PRC
| | - X. Sun
- College of Materials Science and Metallurgy Engineering, Guizhou University , Guiyang , PRC
| | - S.-G. Peng
- College of Materials Science and Metallurgy Engineering, Guizhou University , Guiyang , PRC
| | - Y.-W. Wang
- National Engineering Research Center for Compounding and Modification of Polymeric Materials , Guiyang , PRC
| | - S.-H. Qin
- College of Materials Science and Metallurgy Engineering, Guizhou University , Guiyang , PRC
- National Engineering Research Center for Compounding and Modification of Polymeric Materials , Guiyang , PRC
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