| 초록 |
Multi-walled carbon nanotube-polyurethane composites were synthesized by in situ polymerization to make enhanced mechanical properties with electroactive shape recovery. 4, 4’-methylene bis(phenylisocyanate) was used as hard segment, and polycaprolactone was employed as soft segments of polyurethane block copolymer. A series of composites synthesized using different methods. The effect of different methods on the dispersion, mechanical and electrical properties of PU-MWNT composites were investigated by SEM, tensile testing and conductivity measurements. SEM results showed that in situ polymerization allowed dominant dispersal of carbon nanotubes. Mechanical properties were higher of those composites made from in-situ polymerization process compared to solvent casting. The amount and degree of chemical modification of carbon nanotubes are available to tailor the mechanical and conducting properties of composites. The good electroactive shape recovery could be also demonstrated in these composites by applying voltage. |
