Data set on “Phase Organization and Circularity in PLLA/Vitrimer Semi-Interpenetrating Polymer Networks”

The present dataset supports the publication titled “Phase Organization and Circularity in PLLA/Vitrimer Semi-Interpenetrating Polymer Networks”. This study explores the structural and functional characteristics of semi-interpenetrating polymer networks (semi-IPNs) formed by curing a bio-based vitrimeric covalent adaptable network (CAN) resin, referred to as DOM-MVL, in the presence of poly(L-lactic acid) (PLLA). Three semi-IPN systems with PLLA:DOM-MVL weight ratios of 80:20, 65:35, and 50:50 were developed. All systems were subjected to mechanical reprocessing via hot pressing. Additionally, the feasibility of selectively separating and recovering both components was demonstrated, enabling the recovery of pure PLLA and recycled DOM-MVL CAN. The dataset includes the following characterization data: ¹H NMR spectroscopy: to confirm the chemical structure of the DOM-MVL resin. ATR-FTIR spectroscopy: to optimize curing conditions for the DOM-MVL resin and characterize the cured samples. Thermogravimetric analysis (TGA): to verify the composition of the semi-IPNs and assess the thermal properties of reprocessed and chemically recycled samples. Differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA): to confirm semi-IPN formation and evaluate thermal and mechanical transitions. Optical microscopy: to investigate the influence of DOM-MVL CAN on PLLA crystallization behavior. Scanning electron microscopy (SEM): to examine the morphology of the semi-IPNs after selective PLLA dissolution in dichloromethane (DCM). Small- and wide-angle X-ray scattering (SAXS-WAXS): to probe the organization of the two phases at the meso- and nanoscale. Stress-strain measurements: to study the mechanical properties of the materials. This comprehensive dataset supports the findings presented in the manuscript and provides detailed insights into the design, characterization, and recyclability of the semi-IPN systems.