电负性对化学反应动力及碱激发水泥解聚与聚合的影响

The Influence of Electronegativity for Chemistry Reaction Power and Depolymerization and Polymerization of Alkli-activated Cement

根据不同离子或氧化物阳离子之间的化学反应动力大小与电负性对数值之差成正比关系的探讨,解释了电负性影响碱激发水泥解聚与聚合的机理。阐明了碱激发水泥的解聚,是由于强碱性阳离子与硅离子的电负性对数值之差,大于硅与氧的电负性对数值之差;附有羟基的硅氧配位体脱水后重新聚合应是一个自发过程,促进脱水则可加速聚合;聚合产物中的强碱性阳离子能被硅铝网链中的铝氧配位体所固定,与强碱性阳离子和铝离子的电负性对数值之差,小于铝与氧的电负性对数值之差有关。

This article explained the depolymerization and polymerization mechanism of alkali-activated cement,which according to the chemical kinetic mechanism between different ionic groups or oxide cationic is proportional to the electronegativity logarithmic value.When the logarithmic electronegativity difference value between strong basicity cations and silicon ions was larger than the difference between silicon ions and oxygen ions,the depolymerization took place.The repolymerization reaction of hydroxyl-containing silicon-oxygen tetrahedron which after dehydration is a spontaneous process,and accelerate dehydration degree would accelerate the speed of polymerization.The strong basicity cations of polymerization product which is fixed in aluminium-oxygen tetrahedron was connected with the condition that the logarithmic electronegativity difference value between strong basicity cations and aluminium ions was less than the difference between the aluminum ions and oxygen ions.