• • The LF-TSB model predicts that suppressing the driving force for phase separation (e.g., by reducing molecular rigidity to lower T_g) enhances thermal stability; blends with T_g differences below 20°C maintain stable morphology after 1000 hours of thermal annealing at 85°C.
• • Optimizing side-chain architecture to increase effective monomeric volume by 15% reduces the critical temperature for phase separation by 10°C, enabling stable operation at elevated temperatures.
• • Molecular symmetry, which increases configurational entropy, can shift the re-entrant phase boundary by up to 30°C, allowing multi-step annealing protocols to trap kinetically stable morphologies.
• • The model's parameters (effective monomeric volume, flexing energy) require fitting to experimental phase diagrams; for new blends, prediction accuracy is limited to ±5°C unless parameters are measured via calorimetry or scattering.