The Effect of Reactor Conditions on High-Impact Polypropylene Properties and Gas Phase Polymerization Kinetics

2018 ◽  
Vol 12 (4) ◽  
pp. 1700063 ◽  
Author(s):  
Aarón J. Cancelas ◽  
Lanti Yang ◽  
Robin Girod ◽  
Jos de Heer ◽  
Ralf Kleppinger ◽  
...  
Keyword(s):  
Gas Phase ◽  
Polymerization Kinetics ◽  
High Impact ◽  
Gas Phase Polymerization

Impact of catalyst injection conditions on the gas phase polymerization of propylene

2017 ◽  
Vol 2 (1) ◽  
pp. 75-87 ◽  
Author(s):  
Aarón J. Cancelas ◽  
Vincent Monteil ◽  
Timothy F. L. McKenna
Keyword(s):  
Gas Phase ◽  
Initial Temperature ◽  
Flow Reactor ◽  
Mineral Oil ◽  
Polymerization Kinetics ◽  
Current Work ◽  
Stopped Flow ◽  
Temperature Profiles ◽  
Polymer Properties ◽  
Gas Phase Polymerization

In the current work, gas phase propylene polymerizations were performed on ZN catalysts in a stopped flow reactor to understand the effect that the injection conditions (dry, as received, or wetted with a commercially available paraffinic mineral oil) have on initial temperature profiles, nascent polymer properties, and polymerization kinetics.

Multizone circulating reactor modeling for gas-phase polymerization. I. Reactor modeling

2004 ◽  
Vol 93 (3) ◽  
pp. 1042-1052 ◽  
Author(s):  
Fabiano A. N. Fernandes ◽  
Liliane M. F. Lona
Keyword(s):  
Gas Phase ◽  
Reactor Modeling ◽  
Gas Phase Polymerization

EXCITED STATES OF ACETYLENE AND THEIR ROLE IN PYROLYSIS

1958 ◽  
Vol 36 (1) ◽  
pp. 131-136 ◽  
Author(s):  
G. J. Minkoff
Keyword(s):  
Liquid Phase ◽  
Induction Period ◽  
Gas Phase ◽  
Recent Work ◽  
Excited States ◽  
Trans Configuration ◽  
Detailed Mechanism ◽  
Vinyl Polymerization ◽  
Gas Phase Polymerization ◽  
Kinetic Form

Previous theories of acetylene pyrolysis are reviewed in the light of recent work by Minkoff, Newitt, and Rutledge. It is shown that the relatively large rates observed at the beginning of the induction period do not agree with mechanisms involving the intervention of comparatively stable dimers. The required kinetic form is obtained, however, if a triplet diradical is produced on the surface in a bimolecular process, followed by gas phase polymerization, with some chain ending on the surface. The detailed mechanism closely resembles Flory's scheme for liquid phase vinyl polymerization. The shape of the radical is discussed, and it is suggested that the trans-configuration leads to polymerization, while the cis facilitates dehydrogenation.

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