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Recorded skill exchanges relevant to difference aspects of researching polymers. Broader Impacts Higher Education & Professional Development Technique Tutorials Open-Source, Cross-Disciplinary Technical Knowledge Trainees in the U.S. National Science Foundation's Center for Molecularly Optimized Networks (NSF MONET) produce "Technique Tutorials." These are short summaries of technical capabilities (including computation and theory!) designed to give a functional picture of how the Center's technical approaches contribute to our research goals. Tutorials Directory NDS for Quantifying Topological Loop Defects Stress Relaxation Measurements Characterizations of Viral Nanoparticles Restoring Force Triangle Generating Ashby Plots using CRIPT Data Schema Modeling of Covalent Adaptable Networks External Force Explicitly Included DFT Simulations Gel Characterization CRIPT & BigSMILES Tutorial Translation & Commercialization of Academic Research Previous Next

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A team from the Johnson, Craig, and Kulik labs introduce a new class of polymer metal–organic cage (polyMOC) gels featuring polyethylene glycol (PEG) strands of varied length cross-linked through bis-pyridyl-carbazole-based M6L12 cubes, where M is Pd(II), Pt(II), or mixtures thereof. The work introduces a novel MOC architecture for polyMOC design, shows that polyMOCs can be prepared from mixtures of Pd(II)/Pt(II), and demonstrates that polyMOCs display unique relaxation behavior due to their multivalent junctions, offering a strategy for controlling polyMOC properties independently of their polymer components. Article Link

A team from the Craig and Kulik groups crosslinked polybutadiene backbone polymers by complexation with two different metal salts. Though dynamic mechanical analysis (DMA) and small-angle X-ray scattering (SAXS) indicate that the crosslinking density and topology of the two materials are the same, the material crosslinked with copper ions exhibits a higher extensibility and fracture energy than the polymer crosslinked with iron. Article Link

The Johnson lab reports bifunctional silyl ether (BSE)-containing high-density polyethylene (HDPE)-like materials synthesized through a one-pot catalytic ring-opening metathesis polymerization (ROMP) and hydrogenation sequence. The crystallinity of these materials can be adjusted by varying the BSE concentration or the steric bulk of the Si-substituents, providing handles to control thermomechanical properties. Article Link