【摘要】 研究了钛酸酯偶联剂T对纳米Al(OH)3的干法改性工艺,确定了偶联剂最佳质量分数0.5%、改性时间25min、改性温度100～110℃。采用红外光谱、TEM等检测手段对改性结果进行表征,改性后无机粉体表面包覆有机基团,吸油值减小,团聚减弱,比表面积增加。改性Al(OH)3在乙烯醋酸乙烯共聚物(EVA)中具有良好的分散性,阻燃效能提高,并保持了材料的力学性能。更多还原

【Abstract】 By a dry modification of nano-Al（OH）₃ with titanate coupling agent, the best results were obtained: coupling agent dosage 0.5%（by weight）, reaction time 25?min and temperature 100～110?℃. The surface characterization of the modified particles was investigated by means of FTIR and TEM, etc. IR analysis shows that the organic groups have attached to Al（OH）₃ surface by chemical bonds. TEM reveals that the agglomeration of the nano-particles weakens, the specific surface area of Al（OH）₃ enlarges. It is observed that the modified Al（OH）₃ has a better dispersion and adhesion to the EVA matrix than the unmodified Al（OH）₃, and the flame retardancy of Al（OH）₃ is improved while the mechanical properties of the composites could be remained.更多还原