Self-Assembly of Diblock Copolymers into Novel Snowflake-Shaped Aggregates Driven by Quadruple Hydrogen Bonding
✍ Scribed by Yu Wang; Yu Cao; Yipeng Qiu; Liming Tang
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 213 KB
- Volume
- 29
- Category
- Article
- ISSN
- 1022-1336
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Two well‐defined diblock copolymers with quadruple hydrogen‐bonding groups on one block, denoted PSUEA‐1 and PSUEA‐2, have been synthesized, and novel snowflake‐shaped nanometer‐scale aggregates, self‐assembled by such diblock copolymers in non‐polar solvents, have been observed. The micellar dimensions were investigated by DLLS and SLLS. Their morphologies were studied by TEM. Since the degrees of polymerization of the Upy‐containing blocks of PSUEA‐1 and PSUEA‐2 are quite similar and the polystyrene block of the PSUEA‐1 is longer than that of the PSUEA‐2, a subtle but identifiable difference between the sizes and structures of the PSUEA‐1 and PSUEA‐2 aggregates was noticed and characterized.
magnified image