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Licensed Unlicensed Requires Authentication Published by De Gruyter June 3, 2013

Upgrading Recycled HDPE by Rheometer-Controlled Crosslinking

A. Pillo, J. M. Dealy and W. I. Patterson


An in-line rheometer previously described was evaluated for use in the upgrading of post-consumer, recycled HDPE. Feed resin of variable melt index was brought to a preset, uniform viscosity by peroxide induced crosslinking in a twin-screw extruder. Closed loop control was demonstrated using the rheometer as a viscosity sensor. Set-point tracking was achieved using PID-IMC, Dahlin and minimum variance (MV) controllers. The Dahlin controller showed the best load rejection.

* Mail address: Prof. W. Ian Patterson, Department of Chemical Engineering, McGill University, 3480 University Street, Montréal (Québec), Canada, H3A 2A7

Received: 1994-6-28
Accepted: 1996-7-29
Published Online: 2013-06-03
Published in Print: 1997-03-01

© 1997, Carl Hanser Verlag, Munich