Viscoelastic properties of branched whole polymers. II. Regularities in the solution viscosity, melt viscosity, and molecular weight

✍ Scribed by Peticolas, Warner L.

• Publisher: John Wiley and Sons
• Year: 1962
• Weight: 481 KB
• Volume: 58
• Category: Article
• ISSN: 0022-3832
• DOI: 10.1002/pol.1962.1205816693

✦ Synopsis

Abstract

For linear polymers there is generally an experimental relation between the melt viscosity η, intrinsic viscosity [η], and viscosity‐average molecular weight M̄~v~, which forms a one‐dimensional curve in the three‐dimensional space, η, [η], M̄~v~. Thus, from a knowledge of one of these quantities it is possible to obtain the other two. For randomly branched polymers, evidence is given in this paper to show that there exists a twodimensional surface in this same space so that any one of these three variables may be obtained from a determination of the other two. In such cases the viscosity‐average weight may be obtained from a measurement of both [η] and η. Such a relationship is shown to exist from the data of Charlesby on branched silicones as well as our own data on polyolefins.