Abstract
A series of well-defined aniline-chain-end-functionalized regioregular poly(3-hexylthiophene)s (P3HT−NH2) and sulfo-chain-end-functionalized polystyrene (PS−SO3H) have been prepared based on quasi-living Grignard metathesis and living anionic polymerization, respectively. Block copolymers via ionic interaction, (P3HT−NH3+)-b-(PS−SO3−)s, were successfully synthesized, simply by blending P3HT−NH2 with PS−SO3H in toluene. The thermal and optical properties of the block copolymers were investigated by differential scanning calorimetry (DSC) and ultraviolet−visible (UV−vis) spectroscopy. The self-assembly behavior of the (P3HT−NH3+)-b-(PS−SO3−) 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 P3HT−NH3+ and PS−SO3− domains as well as the packing behavior of P3HT−NH3+ segments in block copolymer thin films. By exploiting the pH-sensitive ionic interaction, the PS−S...
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