| 초록 |
The phase behavior of a poly(styrene-b-ethylene-alt-propylene) (PS-PEP, MWPS = 42,000 g/mol and MWPEP = 62,000 g/mol) diblock copolymer in 1-phenyldodecane, neutral to both blocks, was investigated as a function of temperature and polymer concentration using small-angle X-ray scattering (SAXS). Lamellae (LAM), hexagonally packed cylinders (HEX) and disordered state (DIS) were observed as the concentration of PS-PEP decreases from 100 to 10 by weight percentage. Also, as the temperature increases from room temperature up to 225 °C, 1-phenyldodecane attenuates the unfavorable interaction between two blocks, resulting in reduced domain spacing. However, although 1-phenyldodecane is supposed to be a neutral solvent for both blocks, intensive SAXS analysis shows that it favors slightly PEP block. |
