We have synthesized low-molecular-weight diblock copolymers of polystyrene-block-poly(dimethylsiloxane) with total molecular weights <12 kg/mol and PS volume fractions of ∼0.2. We have investigated the phase behavior of the PS-PDMS in its pure state and with up to 10 wt% of C60 added. The C60 was shown to selectively segregate into the PS phase only although its solubility limit is ∼1 wt%. Although the C60 aggregates above 1 wt%, the cylindrical morphology observed in the pure copolymer bulk samples persists in the C60-copolymer composites even up to 10 wt% C60 loading. In thin films, the pure copolymer possesses a highly ordered morphology with grains hundreds of microns across. When C60 is blended with the copolymer the high degree of order rapidly decreases due to increasing numbers of defects observed.
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry