Zografos, AristotelisMaines, Erin, MHassler, Joseph, FBates, Frank, SHillmyer, Marc, A2024-05-162024-05-162024-05-16https://hdl.handle.net/11299/263238The data folder contains all data used in each figure of the manuscript and supporting information, which includes raw spectroscopy, spectrometry, chromatography, and rheology data. See the readme.txt file for further details.These files contain primary data along with associated output from instrumentation supporting all results reported in Zografos et al. Preparation and Characterization of H-Shaped Polylactide. In Zografos et al. we developed an efficient strategy for synthesizing H-polymers. An H-polymer has an architecture that consists of four branches symmetrically attached to the ends of a polymer backbone, similar in shape to the letter ‘H’. Here, a renewable H-polymer efficiently synthesized using only ring-opening transesterification is demonstrated for the first time. The strategy relies on a tetrafunctional poly(±-lactide) macroinitiator, from which four poly(±-lactide) branches are grown simultaneously. Proton nuclear magnetic resonance (1H-NMR) spectroscopy, size exclusion chromatography (SEC), and matrix assisted laser desorption/ionization (MALDI) spectrometry were used to verify the macroinitiator purity. Branch growth was probed using 1H-NMR spectroscopy and SEC to reveal unique transesterification phenomena that can be controlled to yield architecturally pure or more complex materials. H-shaped PLA was prepared at the grams scale with a weight average molar mass Mw > 100 kg/mol and narrow dispersity Ð < 1.15. Purification involved routine precipitations steps, which yielded products that were architecturally relatively pure (~93%). Small-amplitude oscillatory shear and extensional rheology measurements were used to demonstrate the unique viscoelastic behavior associated with the H-shaped architecture.CC0 1.0 UniversalH-polymerH-shapedpolylactidetransesterificationrheologyextensional rheologypolymer meltpolymer architecturepolymer synthesisDatasethttps://doi.org/10.13020/3xyj-va41