Study on isotactic polypropylene/zinc-neutralized sulfonated ethylene propylene diene monomer rubber/CaCO3 ternary blends†
This article is a US Government work and, as such, is in the public domain in the United States of America.
Abstract
The morphological structure and mechanical properties of isotactic polypropylene (PP)/zinc-neutralized sulfonated ethylene propylene diene monomer rubber (ZnSEPDM)/CaCO3 blends were studied. PP/ZnSEPDM/CaCO3 blends were prepared through two different sequences. A: Blending PP with ZnSEPDM, then adding CaCO3; B: Blending ZnSEPDM with CaCO3, then adding PP. The blending sequence has substantial influence on the mechanical properties. SEM micrographs and X-ray photoelectron spectrometry indicate that the CaCO3 filler is encapsulated by ZnSEPDM in those blends prepared through sequence B, which caused an extra increase of impact strength. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 1635–1640, 2004
