| 초록 |
To improve the electro-optical properties of polymer-dispersed liquid crystal (PDLC), the phase separation degree between polymer and liquid crystal (LC) was controlled by adding stearyl methacrylate (SMA) with methyl methacrylate (MMA). Monodisperse poly(MMA-co-SMA) substrate particles and LC microcapsules were prepared by dispersion polymerization and solute co-diffusion method (SCM), respectively. With increasing SMA content in substrate particles, the anchoring energy between polymer and LC was decreased due to the long alkyl chain in SMA and the degree of phase separation was increased, which was determined by contact angle measurement and differential scanning calorimetry (DSC). Characterizations of poly(MMA-co-SMA)/LC microcapsules and LC domains were monitored by optical and polarized optical microscope. From scanning electron microscope (SEM) observation, the morphology and the loading states of LC in microcapsules were observed. Electro-optical properties were measured by using He-Ne laser (632.8nm). |
