Investigating the impact of operating conditions on the extent of additive mixing during thermoplastic polymer extrusion

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Colleges, School and Institutes

External organisations

  • Wilton Centre


Adequate dispersion of the additive in polymer composites is vital to their performance. Dispersion occurs via rupture, erosion and collision induced mechanisms. Organophosphorus salt/PET nanocomposites were manufactured on a co-rotating fully intermeshing pilot scale twin screw extruder to determine the impact of operating conditions on the mixing achieved in order to understand the level of control available over the process. The effect on key dispersion mechanisms is discussed. Dispersion was found to increase with decreasing throughput, increasing screw speed and increasing molecular weight of the polymer. Linear relationships between calculated parameters including specific mechanical energy, degree of fill and specific throughput were also observed. A need for a compromise between achieving the desired level of mixing and maintaining the molecular weight of the polymer is established.


Original languageEnglish
Title of host publicationProceedings of PPS-32
Subtitle of host publicationThe 32nd International Conference of the Polymer Processing Society - Conference Papers
Publication statusPublished - 14 Dec 2017
Event32nd International Conference of the Polymer Processing Society, PPS 2016 - Lyon, France
Duration: 25 Jul 201629 Jul 2016


Conference32nd International Conference of the Polymer Processing Society, PPS 2016


  • Degree of Fill, Dispersive Mixing, Intrinsic Viscosity, Molecular Weight, Operating Conditions, Specific Mechanical Energy, Specific Throughput, Twin Screw Extrusion

ASJC Scopus subject areas