期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 54, 期 51, 页码 12705-12713出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.5b03877
关键词
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资金
- National Natural Science Youth Foundation of China [21504071]
- Opening Project of State Key Laboratory of Polymer Materials Engineering of Sichuan University [sklpme2015-4-34]
- Opening Project of Xihua University [szjj2015-091]
In this work, Cu2O exhibited better synergistic effect with microencapsulated ammonium polyphosphate (MAPP) than other metal oxides, such as CuO, ZnO, SnO, Fe2O3, Ni2O3, and Co2O3, on improving the flame retardancy of epoxy resins (EP). Moreover, the addition of cuprous oxide (Cu2O) could further decrease the total smoke production and carbon monoxide production. The analysis of char residues and evolved gases indicated that Cu2O was beneficial to enhance the formation amount, intumescent degree, and compactness of char. The protective layer of intumescent char residue could hinder the decomposition of EP and diffusion of gaseous products, such as hydrocarbons, aromatic compounds and carbon monoxide (CO). In addition, Cu2O also played a role in conversion of CO to CO2 through a redox cycle, involving the reduction of Cu2+-Cu+-Cu-0 by CO and the oxidation of Cu-0-Cu+-Cu2+ by O-2. The possible flame retardant, smoke suppression, and CO oxidation mechanisms were proposed.
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