| 초록 |
In this study, azobenzene-(ladder-like polysilsesquioxane)/poly(ethylene-co-vinyl acetate) (Azo-LPS/EVA) composite was prepared via the thermal curing of aminoazobenzene and epoxide-containing LPS in a EVA matrix. EVA, which is shape memory polymers (SMPs), are a type of materials that can recover to the original shape from a set temporary shape under external stimulus such as heat. Azobenzene (Azo) is also stimuli-responsive material that undergo rapid and reversible trans-to-cis and cis-to-trans isomerization upon UV and visible light irradiation. Introduction of Azo group into siloxane networks can lead to the production of novel photoresponsive materials. Moreover, the incorporation of Azo-LPS into EVA matrix can be attributed to improvement of the mechanical properties and shape memory performance of Azo-LPS/EVA composited. Azo-LPS polymer was uniformly dispersed in the EVA matrix and the composite film exhibited the shape memory behavior stimulated by heat and light. |
