Macromolecules in elongational flow-fields
Abstract
This paper briefly reviews earlier works from this laboratory on the nature of chain extension of high molecular weight flexible-chain polymers in elongational flow-fields. The critical strain-rate at which high extension occurs is investigated as a function of solvent viscosity, molecular weight, and molecular flexibility. Beyond the coil→stretch transition high strain-rate elongational flows produce scission of the extended molecule, the chain breaking closely at its centre. This behavior is modeled by the Stoke's law interaction with the solvent and a modified Arrhenius rate equation for scission of the covalent bonds.
- Publication:
-
Polymer-Flow Interactions
- Pub Date:
- January 1986
- DOI:
- 10.1063/1.35515
- Bibcode:
- 1986AIPC..137...33O
- Keywords:
-
- 61.25.Hq;
- 47.15.-x;
- 47.50.+d;
- Macromolecular and polymer solutions;
- polymer melts;
- swelling;
- Laminar flows