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论文类型：期刊论文

发表时间：2015-12-10

发表刊物：JOURNAL OF APPLIED POLYMER SCIENCE

收录刊物：SCIE、EI、Scopus

卷号：132

期号：46

ISSN号：0021-8995

关键字：flame retardance; mechanical properties; thermal properties

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 H-1-NMR, P-31-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 degrees 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. (c) 2015 Wiley Periodicals, Inc.