![]() ![]() ![]() Various photochemically adaptable materials can be developed based on novel designs of photocleavable crosslinkers. This paper reviews the recent progress in developing photochemically adaptable polymer network materials by designing photoresponsive units, focusing on the chemical structures of cleavable moieties. Furthermore, multiple stimuli-responsive materials have been demonstrated to control photodegradation reaction rates and photoreactivity by combining light with another stimulus, leading to advanced photocontrollable capabilities. Recently, diverse designs of light-responsive units have been developed to fabricate various photocontrollable materials with low-energy, rapid, and reversible photoreactivity. In particular, the efficient photolytic cleavage of the crosslinking points in the network induces rapid softening and degradation of the materials. This processability is attributed to the photocleavage of chemical bonds introduced into the polymer materials. Photochemically adaptable polymer materials, which change shape and physical properties under light irradiation, are widely used in the fields of medicine, electronics, and engineering due to their precise and remote processability.
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