Optimizing 3D printing of polyethylene

We have previously reported a method for 3D printing of polyethylene (https://pubs.acs.org/doi/abs/10.1021/acsapm.9b00813). Currently 3D printed parts made using FDM (fused deposition modeling) have mechanical properties far inferior to conventional injection molded products. This is due to the slow dynamics of polymer chains, that leads to weak joints during 3D printing. This project will examine how varying the molecular weight distribution of polyethylene can improve the mechanical properties of 3D printed parts. This is primarily experimental work and will involve blending polymers using the advanced polymer processing facility, preparing filament, 3D printing and mechanical testing of the printed parts. It will also involve learning about polymer physics, to rationalize the results obtained. The student will need to work closely with an institute postdoctoral fellow in the group who is leading this project.