THERMAL DEGRADATION AND SMOKE PRODUCTION DURING COMBUSTION FOR INTUMESCENT FLAME RETARDANT RIGID POLYURETHANE FOAMS

Dong-mei Xu; Jian-wei Hao; Guo-sheng Liu; Song-ming Xie

doi:10.3724/SP.J.1105.2013.12264

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THERMAL DEGRADATION AND SMOKE PRODUCTION DURING COMBUSTION FOR INTUMESCENT FLAME RETARDANT RIGID POLYURETHANE FOAMS

Research Article | 更新时间：2021-03-19

- THERMAL DEGRADATION AND SMOKE PRODUCTION DURING COMBUSTION FOR INTUMESCENT FLAME RETARDANT RIGID POLYURETHANE FOAMS
- Acta Polymerica Sinica Issue 7, Pages: 832-840(2013)
- 作者机构：
  
  北京理工大学材料学院阻燃材料研究国家专业实验室,北京,100081
- 作者简介：
- 基金信息：
- DOI：10.3724/SP.J.1105.2013.12264
  CLC：
- Published：20 July 2013，
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Dong-mei Xu, Jian-wei Hao, Guo-sheng Liu, Song-ming Xie. THERMAL DEGRADATION AND SMOKE PRODUCTION DURING COMBUSTION FOR INTUMESCENT FLAME RETARDANT RIGID POLYURETHANE FOAMS. [J]. Acta Polymerica Sinica (7):832-840(2013)
DOI：

Dong-mei Xu, Jian-wei Hao, Guo-sheng Liu, Song-ming Xie. THERMAL DEGRADATION AND SMOKE PRODUCTION DURING COMBUSTION FOR INTUMESCENT FLAME RETARDANT RIGID POLYURETHANE FOAMS. [J]. Acta Polymerica Sinica (7):832-840(2013) DOI： 10.3724/SP.J.1105.2013.12264.

摘要

采用热失重、X-射线光电子能谱分析、氧指数及烟密度测试等方法研究了可膨胀石墨(EG)与聚磷酸铵(APP)复配膨胀阻燃硬质聚氨酯泡沫塑料(RPUF)的热降解、燃烧性能及产烟行为.在此基础上利用锥形量热仪考察了EG/APP对磷酸三(-氯异丙基)酯(TCPP)阻燃RPUF体系燃烧性能的影响.研究表明

EG与APP间的相互作用导致了EG/APP体系高温阶段失重速率下降、残炭量显著上升;EG/APP与RPUF之间的成炭作用以APP的化学成炭为主.与RPUF比较

RPUF/EG/APP的氧指数由19.8%提高至35.4%的同时

烟密度没有显著上升.对比EG、APP及EG/APP阻燃RPUF

体系残炭量越高、炭层耐热氧化能力越强

氧指数就越大;残炭表面越致密

产烟量就越少.添加EG/APP可显著降低含卤体系RPUF/TCPP的热释放、烟释放及CO释放速率

体现了EG与APP复合体系物理与化学膨胀结合的优势.

Abstract

The thermal degradation behavior and combustion of rigid polyurethane foams (RPUF) with expandable graphite (EG) and ammonium polyphosphate (APP) were investigated by thermal gravimetric analysis (TG)

X-ray photoelectron spectroscopy (XPS)

limiting oxygen index (LOI) and smoke density test.On this basis

the effect of EG/APP on the combustion of RPUF/tris(-chloroisopropyl)phosphate (TCPP) composites was studied by CONE calorimeter.The results showed that the interaction between EG and APP led to lower weight loss rate of EG/APP at high temperatures and a significant increase of char residue at 800℃.The char formation between EG/APP and RPUF could be mainly contributed by APP.Compared with RPUF

the LOI of RPUF/EG/APP increased from 19.8% to 35.4% and the smoke density changed little.Compared with the RPUF/EG

RPUF/APP and RPUF/EG/APP

the more the amount and the higher thermal oxidation resistance of char residue

the higher the LOI is;the more compact of the residue surface

the lower the smoke released is.It was found that the heat release

smoke production rate and CO release rate of RPUF/TCPP were decreased significantly by the addition of EG/APP.The results embodied the advantages of a combination of chemical and physical intumescent flame retardants in the EG/APP system.

关键词

硬质聚氨酯泡沫膨胀阻燃热降解可膨胀石墨聚磷酸铵

Keywords

Rigid polyurethane foamIntumescent flame retardancyThermal degradationExpandable graphiteAmmonium polyphosphate

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