| Autor: |
Li, Chaoxu, Hyun Lee, Dong, Kon Kim, Jin, Yeol Ryu, Du, P. Russell, Thomas |
| Zdroj: |
Macromolecules; August 2006, Vol. 39 Issue: 17 p5926-5930, 5p |
| Abstrakt: |
Polystyrene-block-poly(n-butyl methacrylate) copolymer (PS-b-PnBMA) exhibits only a lower disorder-to-order transition (LDOT), not a closed-loop phase behavior, within an experimentally accessible temperature range. But, when mixed solvents of di-n-octyl phthalate and hexadecane were added to PS-b-PnBMA, this mixture exhibited the upper order-to-disorder transition (UODT) below the degradation temperature as well as an LDOT above the glass transition temperatures of both blocks; thus, a close-loop phase behavior was observed. These results suggest that the closed-loop phase behavior may be a general phenomenon for weakly interacting polystyrene-block-poly(n-alkyl methacrylate) copolymers with LDOT. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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