Abstract
To reduce the fire hazard of epoxy resin (EP), PA-CS-M (where PA = phytic acid, CS = chitosan, M = Cu2+, Co2+, Al3+, Zn2+, Mn2+) environmental friendly flame retardant is prepared by a simple and green method. By comparing the data after cone calorimetry test (CCT) of various composites, it is found that when 5 wt% PA-CS-Mn is added to EP, it has good flame retardant and smoke suppression performance. The peak heat release rate (pk-HRR) decreased by 38% and the smoke production rate (SPR) decreased by 33%. In addition, some toxic smoke such as CO has been significantly inhibited. The structures and morphologies of the materials were investigated by Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). When combined with expandable graphite (EG), it is found that when the ratio of PA-CS-Mn to EG is 1:5, the pk-HRR value and SPR value decreased by 69.8% and 66.6%, respectively. More importantly, the mechanical properties of the EP composites have also been greatly improved. The flexural modulus reaches 5.04 GPa, which is 52.3% higher than pure EP, and the flexural strength increases to 79.4 MPa, which also shows an increase of 41.4% as to the matrix.
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Acknowledgment: The research was financially supported by NSFC (52063026, 21563026), the Program for Changjiang Scholars and Innovative Research Team in University (IRT15R56), the Innovation Team Basic Scientific Research Project of Gansu Province (1606RJIA324), and the Science, Technology Program of Gansu Province (19JR2RA020) and Education Department of Gansu Province: Excellent Graduate Student “Innovation Star” Project (2021CXZX-001). We also thank the Key Laboratory of Eco-functional Polymer Materials (Northwest Normal University), Ministry of Education, and the Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, for financial support.
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Wang, H., Li, L., Kang, Y. et al. Environmental Friendly Intumescent Flame Retardant Gives Epoxy Resin Excellent Fire Resistance and Mechanical Properties. Macromol. Res. 30, 536–546 (2022). https://doi.org/10.1007/s13233-022-0059-z
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DOI: https://doi.org/10.1007/s13233-022-0059-z