Characterization of thermo-rheological behavior of polymer melts during the micro injection moulding process
|Title:||Characterization of thermo-rheological behavior of polymer melts during the micro injection moulding process||Authors:||Zhang, Nan
Gilchrist, M. D.
|Permanent link:||http://hdl.handle.net/10197/4622||Date:||Sep-2012||Abstract:||In-line process monitoring and rheological characterization can help to understand the behaviour of polymer melt flows during manufacture and to make injection moulding a measurable process for manufacturing high quality parts. This work developed an in-line rheology measurement system using a slit die attached to a micro injection moulding machine. A series of dumbbell mould inserts was used to form the slit die with thickness ranging from 600 μm to 200 μm. Two combined pressure and temperature sensors were embedded into the slit die to measure the pressure drop. Based on the slit flow model, it was found that the viscosity of Pebax melts depends on the slit thickness in the actual injection moulding process. The competing effects of wall slip and non-isothermal conditions will determine the melt viscosity. The plastication induced thermo-mechanical history can also influence polymer viscosity, although it is neglected in conventional rheology measurements.||Type of material:||Journal Article||Publisher:||Elsevier||Copyright (published version):||2012 Elsevier||Keywords:||Rheology;Micro injection moulding;Slit die;Non-isothermal process;Pebax||DOI:||10.1016/j.polymertesting.2012.04.012||Language:||en||Status of Item:||Peer reviewed|
|Appears in Collections:||Mechanical & Materials Engineering Research Collection|
Show full item record
This item is available under the Attribution-NonCommercial-NoDerivs 3.0 Ireland. No item may be reproduced for commercial purposes. For other possible restrictions on use please refer to the publisher's URL where this is made available, or to notes contained in the item itself. Other terms may apply.