Recirculation cell for the small-angle neutron scattering investigation of polymer melts in flow
| Autor: | Julian Bent, Randal W. Richards, Tim Gough |
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| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Review of Scientific Instruments. 74:4052-4057 |
| ISSN: | 1089-7623 0034-6748 |
| DOI: | 10.1063/1.1602939 |
| Popis: | A small-scale flow cell has been developed and used for small-angle neutron scattering (SANS) investigations of polymer melts in Poiseuille flow through a 4:1 contraction. The cell enables the investigation of polymer melt flow subject to a volumetric flow rate of up to 6 cm3 s−1, at pressures up to 10 MPa, temperatures up to 230 °C, and a melt viscosity up to 65 000 Pa s. The cell has recirculating flow path and a relatively small capacity (circa 200 g of polymer) so that polymers with novel and well-defined molecular architectures may be investigated. The details of its construction and operation are described. When two walls of the cell are composed of zero order birefringent sapphire, both small-angle neutron scattering and birefringence studies can be undertaken in the same cell providing a link between macroscopic and molecular level descriptions of the influence of melt flow. Both birefringence and the first melt flow SANS data for a monodisperse, linear polystyrene are presented. These demonstrate... |
| Databáze: | OpenAIRE |
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