Redox-active polymers such as macromolecular nitroxide radicals have been studied as electrode materials for organic batteries and electronics. Polymer−solvent interactions are essential to processing and device performance, but macromolecular nitroxide radical−solvent interactions are currently not well described. In this work, the Hildebrand and Hansen solubility parameters of poly(2,2,6,6-tetramethylpiperidinyloxy-4-yl methacrylate) (PTMA), oxidized PTMA (PTMA + ), and PTMA's precursor (PTMPM) are determined using both experimental and group contribution methods for the first time. This work indicates that the hydrogen-bonding Hansen solubility parameter (δ h ) and the solubility sphere radii (R) provide the best prediction of the macromolecular radical's interaction with solvents. From these solubility parameters, the group contribution values for the nitroxide and oxoammonium cation were then calculated. It is shown that this information allows for the prediction of polymer−solvent interactions for other nitroxide-based macromolecular radicals. Finally, the discovered solubility parameters are used to predict PTMA electrode formulations for batteries that outperform controls.

Purpose This paper aims to conduct two studies to investigate shared leadership and team creativity (TC) in leaderless short-term project teams (STPTs). Design/methodology/approach To answer the research question, this paper used a multi-level mixed-methods design. This paper analyzed video recordings, transcripts of STPTs’ collaboration and self-report surveys from an international engineering competition. In Study 1, this paper attempted to connect relation-oriented shared leadership (ROSL) and task-oriented shared leadership (TOSL) with TC by coding video recordings. In Study 2, this paper further investigated the proposed positive relationship between shared leadership and TC by surveying a sample of 166 students in 51 teams. Findings In Study 1, this paper found that shared leadership covaries with TC following a similar behavioral pattern. In Study 2, multi-level structural equation modeling results suggested that both TOSL and ROSL are positively correlated with TC. Originality/value In this mixed-methods multi-level research, this paper found that when the team’s shared leadership increases, their TC activity becomes frequent. This paper confirmed the qualitative finding by quantitatively investigated the relationship between shared leadership and creativity at the team level.