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考察了纳米尺寸的KH颗粒在不同温度热处理后比表面积的变化及其与化学反应活性之间的关系.纳米KH热处理后,比表面积随着热处理温度升高而减小,但单位表面的化学反应活性却增大.表明热处理改变了KH表面的状态,说明大的比表面积是构成纳米KH高活性的一个主要原因,而具有高表面能的表面也是高活性的一个重要因素.纳米KH具有使苯乙烯快速聚合的催化作用.
The change of specific surface area of nano-sized KH particles after heat treatment at different temperatures and their relationship with chemical reactivity were investigated.The specific surface area decreased with the increase of heat treatment temperature after nano KH heat treatment, but the chemical reaction per unit surface Indicating that heat treatment changes the state of the KH surface, indicating that large specific surface area is one of the main reasons for the high activity of nano-KH, while surface with high surface energy is also an important factor for high activity. Catalysis of ethylene rapid polymerization.