A Rapid Quenched-Flow Device for the Characterisation of the Nascent Polymerisation of Ethylene under Industrial Conditions
✍ Scribed by Audrey Di Martino; Jean Pierre Broyer; Roger Spitz; Günter Weickert; Timothy F. McKenna
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 286 KB
- Volume
- 26
- Category
- Article
- ISSN
- 1022-1336
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Summary: A quenched‐flow reactor is introduced as an effective means for the production of polyolefin particles with precisely controlled reaction times as low as 40 ms. The use of off‐line scanning electron microscopy and induced‐coupled plasma yields experimental data on the development of the kinetics and morphology of nascent structures during the polymerisation of ethylene on a heterogeneous TiCl~4~MgCl~2~ Ziegler–Natta catalyst. Initial ex situ observations revealed the development of specific morphologies very early during the reaction (e.g., cracks in platelike surfaces, fines, extrudates, etc.) that can potentially lead to fines, and the kinetic analysis showed extremely high reaction rates at very short times.
Scanning electron micrograph of a network of fibrils formed by the deformation of the surface of a particle due to the generation of internal forces.
magnified imageScanning electron micrograph of a network of fibrils formed by the deformation of the surface of a particle due to the generation of internal forces.