The rheological properties of a polymer melt (polydimethylsiloxane) have been measured for fractions and unfractionated polymer in steady shear flow and in relaxation and recovery after steady shear flow. The limiting values of the viscosity and normal stress coefficient at low shear rates have been
Relation between rheological properties and the molecular weight distribution of a technical polystyrene
โ Scribed by W. Pfandl; F. R. Schwarzl
- Publisher
- Springer
- Year
- 1985
- Weight
- 543 KB
- Volume
- 263
- Category
- Article
- ISSN
- 0340-255X
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
## Abstract Relationships between the rheological properties and the molecular weight distribution of two polypropylene series with different molecular weight distribution characteristics were studied. The end correction coefficient in capillary flow is determined by the molecular weight __M__~__w_
The non-Newtonian behavior of commercial linear polyethylene samples and their fractions were studied a t 190OC. The viscosity q versus shear rate 9 curves of whole polymers could be superimposed onto a single master curve despite the variations of their molecular weights and molecular weight distri