Surface segregation as well as the agglomerates of PVA in the structure were clearly imaged by the present method with a high resolution optical microscope.

• 在高清晰度光学透射显微镜下，该方法使得聚乙烯醇在干燥坯体中的表面偏析结果，以及分散在坯体内部结构中的聚乙烯醇团聚体得以清楚、准确地呈像。