## Abstract It is known that polyethylene extruding from a capillary viscometer does not attain a steadyβstate output rate immediately following a pressure imposition. The time dependence of output rate was studied quantitatively, and under some extrusion conditions was found to be of surprisingly
β¦ LIBER β¦
Further remarks on time effects in capillary flow of polyethylene
β Scribed by H. P. Schreiber; A. Rudin
- Book ID
- 118281871
- Publisher
- John Wiley and Sons
- Year
- 1962
- Tongue
- English
- Weight
- 172 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0021-8995
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The change in melt flow properties, as determined by melt index measurement, as a function of shear history, has been measured for linear polyethylene. It is shown that a drop in melt index occurs when a polymer sample which has had no previous shear history is melted and subjected to shear mixing.