| 학회 |
한국고분자학회 |
| 학술대회 |
2017년 가을 (10/11 ~ 10/13, 제주컨벤션센터) |
| 권호 |
42권 2호 |
| 발표분야 |
Celebration of the 50th Anniversary of Macromolecules(영어발표) |
| 제목 |
Self-Assembly of End-Functionalized Block Copolymers |
| 초록 |
We have investigated a new means to control the morphology and conductivity of block copolymer electrolytes by the inclusion of ionic units at the chain ends. A set of poly(styrene-b-ethylene oxide) (PS-b-PEO) block copolymers having dissimilar PEO end groups were synthesized. Intriguingly, the incorporation of diol or dicarboxylic acid end groups in PS-b-PEO produced a well-defined gyroid structure, leading to order of magnitude improvements in the storage modulus. Strikingly, the addition of Li salts to PS-b-PEO with sulfonate terminal groups afforded enriched nanostructures with significant differences in their conductivities depending on the salt concentration. Out of the various samples examined, the electrolytes bearing terminal diol displayed the highest ionic conductivity and a twofold increase in lithium transference number. The improvements in performance are attributed to the reduced inter-chain aggregation and the anion-stabilization mediated by the terminal diol group. |
| 저자 |
박문정 |
| 소속 |
포항공과대 |
| 키워드 |
block copolymer; morphology; end-group
|
| E-Mail |
|
