Investigation of disproportionation behaviour of lani5 xmx in hydriding process at high temperature 等离子弧焊维弧行为研究
4.
In these composites , the coupling termination content of pmma decreases while disproportionation content increases . the macromolecular ranging regularity of pmma also increases 上述复合材料中， pmma大分子的终止方式发生偶合终止减少、歧化终止增加的变化，同时pmma整体排列有序度增加。
5.
Meanwhile , fundamental principles about electroless tin plating by reducing agent and disproportionation reaction were explained . function of every component in the bath was explained that complexing agent can effectively change the potential of copper and tin , and accelerate the beginning of replacement reaction favorably ; reducing agent can increase the rate of chemical reaction and has the effect of promoting reaction dynamics too ; antioxidant can effectively prevent sn2 + in the bath from being oxidated ; additive agent a can improve the stability of the bath ; additive agent b has such effects as refining and brightening for the tin deposits , and it enlarges the range of brightening section ; additive agent c used as leveling agent can not only make the depostis level off , but also improve the dispersive ability of the bath ; surface - active agent can solve bubble problem which gathered on the surface of the deposits , and improve the surface quality of the deposits and the bath stability 阐述了镀液中各组分的作用：络合剂能有效地改变铜、锡的电位，促使初期的置换反应顺利进行；还原剂能加快化学反应速度，对反应动力学有积极的促进作用；抗氧化剂能有效地防止镀液中sn ~ ( 2 + )的氧化；添加剂a能提高镀液的稳定性，添加剂b对镀层能有细化和光亮作用，扩大了镀层光亮区的范围；添加剂c作为平滑剂，不仅能增强镀层表面的平整性，而且能提高镀液的分散能力；表面活性剂较好地解决了化学镀过程中汽泡在镀件表面聚集的问题，提高了镀层的表面质量和镀液的稳定性。
