## Abstract Measurements of specific volumes are described as function of temperature and pressure of melting or crystallizing linear polyethylene, __isotactic__ polypropylene, and polyoxymethylene. A pressure range of 50 to 1600 bar permits determination of relative volume changes as function of t
Über die Druckabhängigkeit der viskoelastischen und physikalisch-chemischen Eigenschaften von Polymeren, 7. Einfluß des Lösungsmittels para-Xylol auf das Schmelzen und Kristallisieren von Polyethylen
✍ Scribed by Karl, Veit-Holger ;Asmussen, Frithjof ;Ueberreiter, Kurt
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1978
- Weight
- 372 KB
- Volume
- 179
- Category
- Article
- ISSN
- 0025-116X
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✦ Synopsis
Abstract
Melting and crystallization of polyethylene (PE) with various amounts of xylene is investigated by pressure dependent volume‐temperature curves. These can be calculated by a reduction formula described earlier. Flory's formula for lowering of the melting point of polymers by solvents proves to be applicable also for high pressures.
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## Abstract Ein neues Hochdruckkapillarviskosimeter wird beschrieben, mit dem rheologische Eigenschaften von Polymeren bis zu einem Druck von 5000 bar und einer Temperatur von 200°C untersucht werden können. Die scheinbare Viskosität von Hochdruck‐Polyethylen wird in Abhängigkeit von Druck und Sche
## Abstract A reduction formula for the calculation of the specific volume __v__ at any temperature __T__ and any pressure __P__ is derived; it consists of the two equations: The parameters ξ, ζ and ψ can be easily calculated from values in the literature, and therefore only a volume‐temperature c