| Title: |
Preparation of Nanoporous Poly(3-hexylthiophene) Films Based on a Template System of Block Copolymers via Ionic Interaction. |
| Authors: |
Ayumi Takahashi1, Yecheol Rho1, Tomoya Higashihara1, Byungcheol Ahn1, Moonhor Ree1, Mitsuru Ueda1 |
| Source: |
Macromolecules. Jun2010, Vol. 43 Issue 11, p4843-4852. 10p. |
| Subject Terms: |
*NANOSTRUCTURED materials, *POROUS materials, *BLOCK copolymers, *POLYSTYRENE, *METATHESIS reactions, *POLYMERIZATION, *CALORIMETRY, *ELECTRON microscopy |
| Abstract: |
A series of well-defined aniline-chain-end-functionalized regioregular poly(3-hexylthiophene)s (P3HTâNH2) and sulfo-chain-end-functionalized polystyrene (PSâSO3H) have been prepared based on quasi-living Grignard metathesis and living anionic polymerization, respectively. Block copolymers via ionic interaction, (P3HTâNH3)-b-(PSâSO3â)s, were successfully synthesized, simply by blending P3HTâNH2with PSâSO3H in toluene. The thermal and optical properties of the block copolymers were investigated by differential scanning calorimetry (DSC) and ultravioletâvisible (UVâvis) spectroscopy. The self-assembly behavior of the (P3HTâNH3)-b-(PSâSO3â) thin film was observed by atomic force microscopy (AFM) and transmission electron microscopy (TEM). In addition, grazing incidence X-ray scattering (GIXS) analysis found the microphase separation of P3HTâNH3橷 PSâSO3âdomains as well as the packing behavior of P3HTâNH3뇨♺筬 in block copolymer thin films. By exploiting the pH-sensitive ionic interaction, the PSâSO3âdomains were selectively etched with ethyl acetate/triethylamine, cleaving the ionic interaction between P3HTâNH3橷 PSâSO3âsegments, to obtain the target nanoporous P3HTâNH2films. The porosity of the films was confirmed by AFM, scanning electron microscopy (SEM) and GIXS analyses. [ABSTRACT FROM AUTHOR] |
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