Hyperbranched Rigid Aromatic Phosphorus-Containing?Flame Retardants?for?Epoxy?Resins

编号 020028903

推送时间 20210503

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 Hyperbranched Rigid Aromatic Phosphorus-Containing?Flame Retardants?for?Epoxy?Resins

来源期刊 Macromolecular Materials and Engineering

期 第289期

发表时间 20210301

关键词 DOPO;  epoxy?resins;  flame retardant;  hyperbranched polymers;  phosphine oxide;  phosphorus; 

摘要 A rigid aromatic phosphorus-containing hyperbranched?flame retardant?structure is synthesized from 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO-HQ), tris(4-hydroxyphenyl)phosphine oxide (THPPO), and 1,4-terephthaloyl chloride (TPC). The resulting poly-(DOPO-HQ/THPPO-terephthalate) (PDTT) is implemented as a?flame retardant?into an?epoxy?resin?(EP) at a 10 wt% loading. The effects on EP are compared with those of the monomer?DOPO-HQ and triphenylphosphine oxide (OPPh3) as low molar mass?flame retardants. The glass transition temperature, thermal decomposition,?flammability?(reaction to small flame), and burning behavior of the thermosets are investigated using differential scanning calorimetry, thermogravimetric analysis, pyrolysis?combustion?flow calorimetry, UL 94-burning chamber testing, and cone calorimeter measurements. Although P-contents are low at only 0.6 wt%, the study aims not at attaining V-0, but at presenting a proof of principle:?Epoxy?resinswith?PDTT show promising fire performance, exhibiting a 25% reduction in total heat evolved (THE), a 30% reduction in peak heat release rate (PHRR) due to flame inhibition (21% reduction in effective heat of?combustion?(EHC)), and an increase in T-g at the same time. This study indicates that rigid aromatic hyperbranched polymeric structures offer a promising route toward multifunctional flame retardancy.

服务人员 尚玮姣

服务院士 宋湛谦

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