期刊
POLYMER BULLETIN
卷 67, 期 5, 页码 859-873出版社
SPRINGER
DOI: 10.1007/s00289-011-0473-4
关键词
Epoxy resin; Flame retardancy; Thermal degradation; Organophosphorus oligomer; Dynamic mechanical properties
资金
- National Natural Science Foundation of China [51036007]
- NSFC [61079015]
- CAAC [61079015]
- USTC
An organophosphorus oligomer, poly(DOPO-substituted hydroxyphenyl methanol pentaerythritol diphosphonate) (PFR), was synthesized from the dehydrohalogenation polycondensation of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide substituted hydroxyphenyl methanol (DOPO-HBA) with 3,9-bis(chloro)-2,4,8,10-tetraoxa-3,9-diphosphaspiro [5.5]undecane-3,9-dioxide (SPDPC). The structure of PFR was confirmed by FTIR, (1)H NMR, and (31)P NMR. Advanced flame retardant epoxy resins (FREP) were obtained by incorporating PFR into EP, cured by 4,4'-diaminodiphenylmethane (DDM). Effects of PFR on thermal, dynamic mechanical properties, and flame retardant properties of the epoxy resins were investigated. The dynamic mechanical analysis (DMA) results showed that EP/PFR exhibited higher glass transition temperature than that of neat EP. Moreover, incorporation of PFR significantly enhanced the char yield at higher temperatures. The addition of PFR into epoxy resins significantly improved their flame retardancy, due to the reduction of peak heat release rate, total heat release as well as the mass loss rate.
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