Chlorinated polyethylene (CPE) is a commonly used impact modifier of poly(vinyl chloride) (PVC). The major goal of this research was to understand the fundamental morphological aspects of PVC/CPE blends. Scanning electron microscopy (SEM) was used to image the surface structure of these blends, and both transmission electron microscopy (TEM) and scanning‐transmission electron microscopy (S‐TEM) were used to image the morphological boundaries of the blends. TEM imaging distinguishes the boundaries between PVC and CPE more clearly or better than does S‐TEM, but it is time‐consuming. However, some CPE particles are not observed in TEM because of inefficient staining. S‐TEM imaging is much faster and does not depend on staining for the imaging of the CPE phase.
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Chen et al. (1995) studied this question.
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