Surface Morphology Evolution of a Thin Polymeric Supramolecular Film by Tuning Interactions

✍ Scribed by Ping Zhang; Junpeng Gao; Binyao Li; Yanchun Han

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 418 KB
• Volume: 27
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200500656

✦ Synopsis

Abstract

Summary: A polymeric supramolecule consisting of symmetric polystyrene‐block‐poly(4‐vinylpyridine) (PS‐b‐P4VP), dodecylbenzenesulfonic acid (DBSA), and 3‐pentadecylphenol (PDP) was formed by proton transfer and hydrogen bonding. The surface morphology of a thin film of the polymeric supramolecule has been investigated. The spherical PS microdomains embedded in a P4VP(DBSA)~1.0~(PDP)~1.0~ matrix are observed for the as‐cast film because the weight fraction, f~comb~, of the P4VP(DBSA)~1.0~(PDP)~1.0~ blocks is much higher than that of PS as a result of the non‐covalent interactions of P4VP and DBSA and DBSA and PDP. Upon annealing the PS‐b‐P4VP(1:1)(DBSA)~1.0~(PDP)~1.0~ film at high temperatures, the hydrogen bonding between the DBSA and PDP diminishes, which leads to a change of overall morphology from an ordered sphere to a pitted structure.

AFM topographic image of a PS‐b‐P4VP(1:1)(DBSA)~1.0~(PDP)~1.0~ thin film.

magnified imageAFM topographic image of a PS‐b‐P4VP(1:1)(DBSA)~1.0~(PDP)~1.0~ thin film.