Roy J. Crawford was Vice Chancellor of the University of Waikato, New Zealand. Prior to this he was Pro Vice-Chancellor for Research at Queen's University Belfast in Northern Ireland, United Kingdom. At Queen's University, Professor. Crawford was responsible for establishing the Polymer Processing Research Centre which included the Research Group on rotational moulding of plastics, which he also founded. In 1998, he was elected as a Fellow of the Royal Academy of Engineering, and in 2005 was elected as a Fellow of the Society of Plastics Engineers. In the 2015 Queen's Birthday Honours, Prof. Crawford was appointed a Companion of the New Zealand Order of Merit, for services to tertiary education. Prof. Crawford sadly passed away in 2016.Peter J. Martin is a Reader in the School of Mechanical and Aerospace Engineering at Queen's University Belfast and he is a Fellow of the Institution of Mechanical Engineers. Dr Martin is the current Director of the Polymer Processing Research Centre. Dr Martin's primary research interests are in advanced polymer materials and processing. Dr. Martin has published numerous papers and articles in the area of plastics engineering.