期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 137, 期 38, 页码 -出版社
WILEY
DOI: 10.1002/app.49148
关键词
ammonium polyphosphate; flame retardancy; metal oxides; synergistic effect; unsaturated polyester resin
资金
- National Key Research and Development Plan [2018YFC0800102]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [18KJB620002]
- State Key Program of National Natural Science of China [21436006]
Three metal oxides (MOs) (Fe2O3, Sb2O3, Al2O3) were incorporated into blends of unsaturated polyester resin (UPR)/ammonium polyphosphate (APP) composites with the aim of studying and comparing their synergistic effect on flame retardancy with APP. The UPR-APP/MOs composites were prepared, then the thermal stability and flame-retardant properties of the UPR composites were evaluated by thermogravimetric analysis (TGA), limiting oxygen index (LOI), vertical burning test (UL-94), and cone calorimetry test (CCT). Besides, residues after CCT were characterized by scanning electron microscopy and laser Raman spectroscopy. The LOI values of the UPR composites with 0.5 wt% MOs increased to around 40%. However, the CCT results indicated that the incorporation of Sb2O3 brought an increase in the total heat release. Moreover, these three MOs had different effects on the process of thermal degradation of UPR composites from the TGA results. Based on the above results, Al2O3 provided a best promotion on flame retardancy among three MOs.
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