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Citation: LIU Chang, ZHU Jing-Song, SHAO Chuan-Qiang, YANG Xing-Yu. Synthesis and Flame Retardance of 2,4,8,10-Tetraoxa-3,9-Diphosphaspiro[5,5]-Undecane-3,9-Dioxa-3,9-Disubstitution Benzoylhydrazone Derivatives[J]. Chinese Journal of Applied Chemistry, ;2007, 24(7): 818-822. shu

Synthesis and Flame Retardance of 2,4,8,10-Tetraoxa-3,9-Diphosphaspiro[5,5]-Undecane-3,9-Dioxa-3,9-Disubstitution Benzoylhydrazone Derivatives

1.
a Department of Chemistry, Central China Normal University, Wuhan 430079;
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b Hubei University of Technology, Wuhan 430068

Corresponding author: YANG Xing-Yu,
Received Date: 25 July 2006
Available Online: 18 January 2007
Fund Project: 武汉市重点攻关科技项目(20021002052)资助 (20021002052)

Spirocyclic pentaerythritol di (phosphate monochloride)(SPDPC) containing acid source and carbon source was prepared from phosphorus oxychloride and pentaerythritol.A new series of 2,4,8,10-tetraoxa-3,9-diphosphorus spirocyclic[5,5]undecane-3,9-dioxa-3,9-disubstituted benzoylhydrazone derivatives was synthesized from SPDPC,hydrazine hydrate (85%) and substitution benzaldehyde.Their structures were confirmed by elemental analysis,FTIR,¹H NMR and MS.TG and DSC results show that the target compounds have certain thermal stability due to their higher symmetry structure,heavier molecular mass,more arylgeometry carbon and phosphorus heterocycle carbon.All the compounds are self-extinguish,when the addition amount of the compound was 10% in epoxy resin (E-44),the combustion length was about 10~20 mm in the level combustion test.The LOI was improved to 28.7% when 10% the target compound was added to epoxy E-44.These synthesized compounds have a good flame retardance.
- pentaerythritol,
- benzaldehyde,
- substitution benzoylhydrazone,
- synthesize,
- flame retardance
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