Synthesis, thermal and mechanical behavior of a silicon/phosphorus containing epoxy resin

被引：0
作者：
State Key Laboratory of Structural Analysis for Industrial Equipment, School of Aeronautics and Astronautics, Dalian University of Technology, Dalian [1 ]
116024, China
不详 [2 ]
116024, China
机构：
[1] State Key Laboratory of Structural Analysis for Industrial Equipment, School of Aeronautics and Astronautics, Dalian University of Technology, Dalian
[2] Department of Engineering Mechanics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian
来源：
J. Appl. Polym. Sci. | / 46卷
基金：
中国国家自然科学基金;
关键词：
flame retardance; mechanical properties; thermal properties;
D O I：
10.1002/app.42788
中图分类号：
学科分类号：
摘要：
A liquid silicon/phosphorus containing flame retardant (DOPO-TVS) was synthesized with 9,10-dihydro-9-oxa-10-phosphapheanthrene-10-oxid (DOPO) and triethoxyvinylsilane (TVS). Meanwhile, a modified epoxy resin (IPTS-EP) was prepared by grafting isocyanate propyl triethoxysilane (IPTS) to the side chain of bisphenol A epoxy resin (EP) through radical polymerization. Finally, the flame retardant (DOPO-TVS) was incorporated into the modified epoxy resin (IPTS-EP) through sol-gel reaction between the ethyoxyl of the two intermediates to obtain the silicon/phosphorus containing epoxy resin. The molecular structures of DOPO-TVS, IPTS-EP and the final modified epoxy resin were confirmed by FTIR spectra and 1H-NMR, 31P-NMR. Thermogravimetric analysis (TGA), differential scanning calorimetry, and limiting oxygen index were conducted to explore the thermal properties and flame retardancy of the synthesized epoxy resin. The thermal behavior and flame retardancy were improved. After heating to 600°C in a tube furnace, the char residue of the modified resin containing 10 wt % DOPO-TVS displayed more stable feature compared to that of pure EP, which was observed both by visual inspection and scanning electron microscope (SEM). Moreover, the mechanical performance testing results exhibited the modified epoxy resins possessed elevated tensile properties and fracture toughness which is supported by SEM observation of the tensile fracture section. © 2015 Wiley Periodicals, Inc.
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