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Flow instability for binary blends of linear polyethylene and long-chain branched polyethylene
- Source :
-
Journal of Non-Newtonian Fluid Mechanics . Feb2011, Vol. 166 Issue 3/4, p231-240. 10p. - Publication Year :
- 2011
-
Abstract
- Abstract: The rheological properties and flow instability are studied for binary blends composed of a long-chain branched polyethylene and a linear polyethylene. It is found that the blends containing a linear-polyethylene with high shear viscosity exhibit higher oscillatory moduli, drawdown force, and strain-hardening behavior. The blends showing the anomalous rheological phenomena show sharkskin failure in low shear rate region as compared with a pure linear polyethylene. Moreover, the blends exhibit severe gross melt fracture at low output rate. Enhanced strain-hardening in elongational viscosity and large entrance angle at a die entry will be responsible for the severe gross melt fracture for the blends. [ABSTRACT FROM AUTHOR]
- Subjects :
- *POLYETHYLENE
*RHEOLOGY
*POLYMERS
*SHEAR (Mechanics)
*FRACTURE mechanics
*ANGLES
Subjects
Details
- Language :
- English
- ISSN :
- 03770257
- Volume :
- 166
- Issue :
- 3/4
- Database :
- Academic Search Index
- Journal :
- Journal of Non-Newtonian Fluid Mechanics
- Publication Type :
- Academic Journal
- Accession number :
- 57371184
- Full Text :
- https://doi.org/10.1016/j.jnnfm.2010.11.011