通过碱溶胀法制备了不同中间层对核包覆比的聚合物中空乳胶粒，然后通过粒径分析、粘度分析、SEM 分析、TEM 分析、紫外－可见分光光度计分析等方法对制得的中空乳胶粒进行表征，研究了中间层对核包覆比对中空乳胶粒的形态和遮盖性影响．结果表明: 随着中间层对核包覆比从6 到10 的增加，中空乳胶粒的溶胀程度逐渐减小，强度逐渐增加，遮盖性先增加后减小; 当中间层对核包覆比为6，7 时，中空乳胶粒表面粗糙，溶胀程度较大，空腔较大，壳层较薄，有相当数量的乳胶粒塌陷甚至破裂; 当中间层对核包覆比为9，10 时，中空乳胶粒表面光滑，溶胀程度小，空腔较小，壳层较厚，几乎无乳胶粒塌陷和破裂; 当中间层对核包覆比为8 时，中空乳胶粒溶胀程度适中，遮盖性最佳．

A series of polymeric hollow latex particles with various encapsulation ratios of intermediate layers to cores were prepared via the alkali swelling method.Then,the products were analyzed in terms of the size and the viscosity and were characterized by means of SEM,TEM and UV- Vis spectrophotometry,and the effects of the encapsulation ratio on the morphology and opacity ability of the products were investigated.The results show that (1) when the encapsulation ratio increases from 6 to 10,the swelling degree of the hollow latex particles decrea-ses,the swelling strength gradually increases,and the opacity ability first increases and then decreases; (2) when the encapsulation ratio is 6 and 7 ,the hollow latex particles are of rough surfaces with higher swelling degrees,bigger cavities and thinner intermediate layers as well as some collapse and rupture; (3) when the encapsulation ratio is 9 and 10,the hollow latex particles are of smooth surfaces with lower swelling degrees,smaller cavities,thicker intermediate layers and with almost no collapse and rupture; and (4) when the encapsulation ratio is 8,the hollow latex particles possess a moderate swelling and achieve the best opacity ability.