偶氮苯-有机醇复合材料的热性能研究

Investigation on Thermal Properties of Azobenzene-organic Alcohol Composites

采用熔融共混法制备了含有偶氮苯化合物分别为25 wt%、35 wt%和45 wt%的偶氮苯-有机醇三种复合材料,研究了偶氮苯化合物含量在光照前后对十四醇相变性能及复合材料热稳定性的影响。结果表明,当偶氮苯化合物质量分数达到45 wt%时,在光照前后复合材料中十四醇的熔融温度差约在0.5℃,最大结晶温度差为5.67℃。随着偶氮苯化合物含量的增加,复合材料的热稳定性可适量提高,45 wt%偶氮苯化合物含量的十四醇达到最大热解速率时温度从188.91℃提升至194.4℃,偶氮苯化合物达到的最大热解速率时温度从266.28℃提升至318.2℃。

Three kinds of azobenzene-organic alcohol composites containing 25 wt%, 35 wt% and 45 wt% azobenzene compounds were prepared by melt-blending. The effects of azobenzene content on the phase transition properties and thermal stability of tetradecyl alcohol were studied before and after UV illumination. The results show that when the mass fraction of azobenzene compounds reaches 45 wt%, the melting temperature difference and the maximum crystallization temperature difference of the tetradecyl alcohol in composites before and after UV illumination are about 0.5 ℃ and 5.67 ℃, respectively. With the increase of azobenzene compounds content, the thermal stability of the composite can be moderately improved. When the composites containing 45 wt % azobenzene compounds reached the maximum pyrolysis rate, the temperature of tetradecyl alcohol increased from 188.91 ℃ to 194.4 ℃, and the temperature of azobenzene compounds increased from 266.28 ℃ to 318.2 ℃.