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Molecular weight distribution of commercial emulsion grade PVC
Author(s) -
Pepperl G.
Publication year - 2002
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.10364
Subject(s) - emulsion , emulsion polymerization , molar mass distribution , materials science , suspension (topology) , polymer , polymerization , chemical engineering , polymer chemistry , polymer science , composite material , mathematics , homotopy , pure mathematics , engineering
At first glance the molecular weight distributions (MWDs) of suspension and emulsion grade PVC are very similar. However, studying the MWDs for both polymerization technologies in more detail reveals systematic differences that can be explained by the differences in the polymerization processes. The MWD of continuous emulsion PVC is broader than that of batch emulsion PVC, which, in turn, is broader than that of suspension PVC. When correlating molecular weight data to K values, it has to be considered that K values from resins including polymerization additives are different from the K value of the pure polymer. The knowledge of the differences in MWD may be helpful for estimating differences in other properties of the products.