【摘要】 以含铅聚合物微凝胶与Ｈ＿２Ｓ气体反应制得ＰｂＳ纳米微粒／聚合物复合体系，利用小角Ｘ光散射方法对复合在聚合物中的ＰｂＳ纳米微粒的粒度及分布进行了表征，研究了不同反应条件对其粒度及复合体系稳定性的影响．实验结果证明Ｈ＿２Ｓ的用量及小分子含铅反应物的引入对复合的ＰｂＳ纳米微粒的粒度有一定的控制作用．由于聚合物对ＰｂＳ纳米微粒具有非常好的稳定作用，ＰｂＳ纳米微粒的粒度随Ｈ２Ｓ量的增加变化很小，且分布均一，体系具有长期稳定性；而不同量的小分子铅盐的引入对ＰｂＳ纳米微粒粒度变化影响很大，随着小分子铅盐比例的增加粒度分布变宽，体系稳定性下降．更多还原

【Abstract】 Using SAXS method,the particle size and its distribution of the PbS nanoparticles doped in the polymer matrices were characterized.Based on the SAXS results together with direct observation,the effect of the reaction conditions on the stability of the composite system was obtained.The experiment revealed that the amount of the H2S used in reacting with the P-Pb can affect the PbS particle size and its distribution, but this effect is very small,because of the good stability effect of polymer on the PbS nanoparticles,the composite system possesses a long-term stability.While the particle size and its distribution can be changed in a larger range when small organic lead salt was introduced into the reaction system.The particle size and its distribution were growing as the increasing of the proportion of PB(MA)2 to P-Pb.As a result,the composite system lost its stability at high Pb(MA)2 concentration.更多还原