The flame retardancy poly(butylene succinate)(PBS) wood fiber composites were prepared by using IFR and modified natural carbohydrates-MHSH.The flame retardant properties of the composites were studied by using the limiting oxygen index and vertical combustion test.TG/DTA-MS was used to analyze the pyrolysis process,heat absorption and pyrolysis combustion gas products of the composites.Experimental data showed that 5% of cassava dregs could be used as a carbon source instead of PBS to improve the flame retardant performance of the composites.IFR/cassava dregs/MHSH flame retardant could effectively increase the initial burning temperature of PBS,and reduced the burning temperature range.When the flame retardant composites were burned,first,the non-combustible gas ammonia generated by the thermal decomposition of IFR formed the first flame-retardant protective layer on the surface of the composites.Second,the carbon layer produced by the rapid burning of the composites formed a second flame-retardant protective layer.Finally,MHSH was decomposed to form a third layer of synergistic flame-retardant protective layer in the high temperature section.As a result,a gas-solid flame retardant barrier composed of an outer non-flammable gas ammonia and an inner natural carbohydrate-MHSH expanded carbon layer was formed.Thereby,the flame retardancy of the composites were effectively improved.
Liu Pengjie, Zhang Xinlei, He Guangjian, Sun Yifeng, Wei Junfeng
. Study on pyrolytic combustion characteristics and products of flame retardant wood plastic composite[J]. New Chemical Materials, 2021
, 49(3)
: 142
-146
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.03.032
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