A Two‐Stage Polymerization Strategy for Preparing Polymer‐Network Liquid Crystals with Oxygen‐Sensing Property

Polymer-Network Liquid Crystals In article number 2300340, Dan Luo, Kun-Lin Yang, and co-workers show that after partially completed photopolymerization, the polymer network liquid crystal undergoes a secondary polymerization to form an isotropic polymer network when it is heated beyond its clearing point, resulting in an irreversible optical appearance change from transparent to cloudy. It enables applications such as a heating stopwatch and oxygen sensing.