Although the addition of fillers both coated and
uncoated to PVC compounds is now commonplace, research into
their role in the fusion process and subsequent end product properties is limited.
Thus five grades of natural calcium carbonate filler of
varying particle size were incorporated into a simple rigid
PVC pipe formulation by dry blending and then extrusion on a
twin screw extruder. [Continues.]
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.
Science and Engineering Research Council. ECC International Ltd.