The September issue of Can. J. Chem. Eng. features two new additions to our Established Leaders Special Series: “Water-based polyurethanes for sustainable advanced manufacture” by Pengxiang Si and Boxin Zhao and “Advances in peroxide-initiated graft modification of thermoplastic biopolyesters by reactive extrusion” by Praphulla Tiwary, Naqi Najafi, and Marianna Kontopoulou, MCIC. These two articles will be free to read for a short period of time, so be sure to access them soon. Also included in this issue is a new Experimental Methods in Chemical Engineering Special Series article: “Experimental methods in chemical engineering: Density functional theory” by Hasan Al-Mahayni, Xiao Wang, Jean-Philippe Harvey, Gregory S. Patience, MCIC, and Ali Seifitokaldani, MCIC. Another feature article that you won’t want to miss is our Editor’s Choice article for this month: “Estimating polystyrene equation of state (EOS) parameters using the cloud and critical points of polystyrene + hydrocarbon mixtures” by Ryan A. Krenz and Torben Laursen, composed in honour of Professor Robert A. Heidemann.

In August, we also released our latest virtual issue­­ Sustainability in Chemical Engineering—a compilation of 15 articles highlighting the excellent work being done by researchers related to this topic. Explore this virtual issue while it’s free to read until mid-October.