Experimental study reveals solid-state mechanical correlations and unexpected plasticization behaviors in extrudates, suggesting free-volume effects dominate thermodynamics.
= 0.910), providing a material-sparing screening methodology. Notably, this work uncovers a thermodynamic-mechanical paradox: the marginally miscible GF/HPC system antiplasticized while the strongly miscible GF/PVPVA system plasticized in bulk, contrary to what the Flory-Huggins interaction parameter and Tg would predict. This paradox is explained by polymer chain architecture and free-volume (hole-filling) effects rather than thermodynamic interaction strength alone.
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Kossor et al. (2026) studied this question.
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