【作者】 包晨露； 郭玉强； 袁必和； 宋磊； 胡源；

【Author】 BAO Chenlu,GUO Yuqiang,YUAN Bihe,SONG Lei,and HU Yuan State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei,Anhui 230026,P.R.China

【机构】 中国科学技术大学火灾科学国家重点实验室；

【摘要】 为了提高聚乙烯醇的热稳定性和阻燃性能,制备了聚乙烯醇/磷酸钛(α-磷酸钛和无定形磷酸钛)纳米复合材料。磷酸钛在聚乙烯醇中均匀分散。磷酸钛含量为1%时,纳米复合材料热解温度提高约80℃。α-磷酸钛的含量为4%时,纳米复合材料的热失重速率峰值降低48%;热释放速率峰值降低80%,峰值对应温度提高约180℃。对比研究表明,磷酸钛的层状结构有利于降低热解速率峰值和热释放速率峰值,但是对于提高热解温度没有明显的作用。更多还原

【Abstract】 In order to improve the thermal stability and flame retardancy of poly(vinyl alcohol)-based nanocomposites,two kinds of titanium phosphates(layered α-titanium phosphate and amorphous titanium phosphate) were incorporated by the solvent blending.The titanium phosphates were homogenously dispersed in the poly(vinyl alcohol) matrix,and caused obvious improvements on the thermal stability and flame retardancy.With 4% α-titanium phosphate,the maximum degradation rate of the nanocomposite was decreased by 48%,and the heat release rate was decreased by 80%,mainly due to the layered conformation of α-titanium phosphate.更多还原