【摘要】 将正硅酸乙酯（TEOS）作为阻燃剂，以提高硬质聚氨酯泡沫（RPUF）的火灾安全性能。采用傅里叶变换红外光谱仪（FT-IR）对其进行表征，根据锥形量热仪测试（CCT）、微型量热仪（MCC）、热重分析（TG）、热重-红外联用（TG-IR）和极限氧指数（LOI）测试RPUF复合材料火灾安全性能。CCT结果表明，RPUF/TEOS复合材料的热释放速率峰值（PHRR）降低。RPUF/TEOS_1.0的点燃时间与纯RPUF相比延长了7倍，复合材料的CO和CO₂的峰值释放速率均降低。RPUF/TEOS_2.0烟释放速率峰值（PSPR）降低了35%。RPUF/TEOS_1.0的火灾性能指数（FPI）是纯RPUF的7.42倍，而火灾蔓延指数（FGI）是纯RPUF的0.24倍。RPUF/TEOS复合材料的极限氧指数（LOI）值均高于纯RPUF。TEOS的加入使RPUF/TEOS复合材料的炭层更加稳定与致密，抑制了热和氧的传递。因此，TEOS的引入提高了RPUF复合材料的火灾安全性能。更多还原

【Abstract】 Tetraethoxysilane（TEOS） was used as an environmentally friendly flame retardant to enhance the fire safety performance of rigid polyurethane foam（RPUF）. Fourier transform infrared spectroscopy（FT-IR） was used to characterize the rigid polyurethane foam composites. The fire safety performance of rigid polyurethane foam composites was tested by cone calorimeter（CCT）, micro calorimeter（MCC）, thermogravimetric analysis（TG）, thermogravimetric infrared（TG-IR）, and limiting oxygen index（LOI） tests. The cone calorimeter test（CCT） results revealed the PHRR（peak heat release rate） values of RPUF/TEOS composites were reduced. The ignition time of RPUF/TEOS_1.0 increased by seven times as long as unmodified RPUF, and the peak CO and CO₂ release rates of RPUF/TEOS composites all decreased. The PSPR of RPUF/TEOS_2.0 decreased by 35%. Fire performance index（FPI） of RPUF/TEOS_1.0 was 7.42 times as high as unmodified RPUF, and fire growth index（FGI） of RPUF/TEOS_1.0 was 0.24 times as low as unmodified RPUF. The limiting oxygen index（LOI） values of RPUF/TEOS composites were all higher comparing to RPUF. The addition of TEOS made the char layer more stable and compact in RPUF/TEOS composites, which inhibited the transfer of heat and oxygen. In conclusion, the fire safety performance of RPUF composites was improved by TEOS. In this work, a new way was provided to improve the fire safety performance of RPUF.更多还原