Effects of a novel phosphorus-nitrogen flame retardant on rosin-based rigid polyurethane foams

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• 作者：Meng Zhang^a ; Zhenyang Luo^b ; Jinwen Zhang^c ; ^{jwzhang@wsu.edu" class="auth_mail" title="E-mail the corresponding author} ; Shuigen Chen^a ; Yonghong Zhou^a ; ^{yhzhou777@sina.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Phosphorus&ndash ; nitrogen flame retardant ; DOPO ; Rigid polyurethane foam ; Rosin-derived polyol
• 刊名：Polymer Degradation and Stability
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：120
• 期：Complete
• 页码：427-434
• 全文大小：1289 K

文摘

A novel phosphorus-nitrogen flame retardant (DOPO-BA) was synthesized from the condensation reaction of benzaldehyde, aniline and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). The structure of DOPO-BA was characterized by Fourier transform infrared spectrometry (FTIR), ¹H NMR, ³¹P NMR, elemental analysis and thermogravimetric analysis (TGA). DOPO-BA was used as a flame retardant in the preparation of rosin-based rigid polyurethane foams (RPUFs). The effects of DOPO-BA addition on the mechanical, thermal, and flame-retardant properties of RPUF were investigated. The morphology of DOPO-BA filled RPUFs was characterized by scanning electron microscope (SEM). The results show that DOPO-BA rendered RPUF good physical, thermal stability and flame-retardant properties. Limiting oxygen index (LOI) value of RPUF containing 20 wt% DOPO-BA increased to 28.1% from 20.1% of the RPUF without DOPO-BA.