| 초록 |
The phase behavior of weakly interacting binary system has been investigated both experimentally and theoretically in polymer community, since this work provides us a key to the compatibility in most applications involving polymer blends and block copolymers. In case of a binary blends system, UCST-type polymer blends generally have a transition from the homogeneous state to phase-separated state by the non-favorable segmental interactions, while LCST-type blends show an opposite tendency as a consequence of thermal compressibility difference between two components. For the binary dPS/PnHMA, We can obtain the evidence for a coexistence of both UCST / LCST behavior by turbidity measurement for the binary blend. Whereas for the block copolymers such as dPS-b-PnHMA and PS-b-PnHMA, an order-to-disorder transition (ODT) on heating was observed within experimental temperature range depending on the molecular weight. |
