Abstract
This work presents a novel strategy of performing a reversible microcrystalline-spherulite morphology transition based on photo-triggered immiscible phase aggregation in semi-crystalline block polymer. We propose that by assembling or disintegrating immiscible photo-active aggregates during melt crystallization under illuminations, end-to-end distance R of the photo-inactive semi-crystalline polymer chains can be adjusted to generate high-entropy state, R< R 0 or low-entropy state, R > R 0. Thus, the corresponding entropic effect influences chain nucleation and can be used to control crystallization morphologies. Besides, photo-tunable mechanical and electrical properties can be also simultaneously endowed. Promising potential applications of this study for optical patterning, memory materials and solid-state electrochemistry can be anticipated.
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