NANOSTRUCTURED AGGREGATES FROM THE SELF-ASSEMBLY OF BAB TRIBLOCK COPOLYMERS WITH A HYDROPHILIC MIDDLE BLOCK A IN WATER

Abstract

International Journal of Computational Engineering ScienceVol. 04, No. 03, pp. 551-554 (2003) MaterialsNo AccessNANOSTRUCTURED AGGREGATES FROM THE SELF-ASSEMBLY OF BAB TRIBLOCK COPOLYMERS WITH A HYDROPHILIC MIDDLE BLOCK A IN WATERJIAN-JUN YUAN, SHI-YUAN CHENG, LEI JIANG, LIN-XIAN FENG, and ZHI-QIANG FANJIAN-JUN YUANCollege of Chemistry and Material Science, Hubei University, Wuhan 430062, China Search for more papers by this author , SHI-YUAN CHENGCollege of Chemistry and Material Science, Hubei University, Wuhan 430062, China Search for more papers by this author , LEI JIANGInstitute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China Search for more papers by this author , LIN-XIAN FENGInstitute of Polymer Science, Zhejiang University, Hangzhou 310027, China Search for more papers by this author , and ZHI-QIANG FANInstitute of Polymer Science, Zhejiang University, Hangzhou 310027, China Search for more papers by this author https://doi.org/10.1142/S1465876303001733Cited by:0 PreviousNext AboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack CitationsRecommend to Library ShareShare onFacebookTwitterLinked InRedditEmail AbstractThe self-assembled nanostructured aggregates with various morphologies, including spherical micelles, worm-like micelles, vesicles and lamellae, have benn observed from the BAB triblock copolymers in water. Here, the polymers used are Polystyrene(PS)43-b-Poly(ethylene oxide)(PEO)45-b-PS43 copolymer with Mw/Mn = 1.48 prepared by ATRP and PS39-b-Poly(4-vinylpyridine)(P4VP)98-b-PS39 copolymer with Mw/Mn = 1.15 synthesized by RAFT. The size and shape of the aggregates are controllable according to some tunable parameters of systems, which affect the balance between three of the major forces acting on the system. These include the stretching of the core-forming blocks, the intercoronal interactions, and the interfacial energy between the solvent and the micellar core. The multiple morphologies were obtained by altering the solvents, solvent composition, copolymers, pH, concentrations, and so on. In addition, the second aggregation behavior of spherical micelles, spherical vesicles, and worm-like micelles was interestedly concerned. It was found that the second aggregation behavior the different complexity for different primary aggregates. For symmetrical primary aggregates, such as spherical micelles and vesicles, the second aggregates appeared symmetrically spherical. In contrast, for unsymmetrical worm-like primary micelles, the second aggregation tended to have unsymmetrical shape. The BAB chain architecture was molecularly suggested to be responsible for the second aggregation.Keywords:Block CopolymerSelf-AssemblyMicellar AggregatesVesicles References S. A. Jenekhe and C. L. Chen CL, Science 283, 372 (1999). Crossref, Google ScholarY. Won, H. T. Davis and F. S. Bates, Science 283, 960 (1999). Crossref, Google ScholarV. Bütünet al., J. Am. Chem. Soc. 121, 4288 (1999). Crossref, Google ScholarS. Stewart and G. Liu, Angew Chem. Int. Ed. 39, 340 (2000). Crossref, Google ScholarJ. A. Masseyet al., J. Am. Chem. Soc. 123, 3147 (2001). Crossref, Google ScholarQ. Maet al., Proc. Natl. Acad. Sci. 99, 5058 (2002). Crossref, Google ScholarA. Graffet al., Proc. Natl. Acad. Sci. 99, 5064 (2002). Crossref, Google ScholarB. M. Discheret al., Science 284, 1143 (1999). Crossref, Google ScholarY. Yu and A. Eisenberg, Macromolecules 31, 3509 (1998). Crossref, Google ScholarA. Halperin, M. Tirrell and T. P. Lodge, Adv. Polym. Sci. 100, 31 (1992). Google ScholarL. Zhang and A. Eisenberg, J. Am. Chem. Soc. 118, 3168 (1996). Crossref, Google ScholarJ. J. Yuanet al., J. Appl. Polym. Sci. 89, 000 (2003). Google ScholarS. Y. Chenget al., J. Appl. Polym. Sci. 77, 2882 (2000). Crossref, Google ScholarJ. J. Yuanet al., Eur. Polym. J. 39, 767 (2003). Crossref, Google Scholar J. J. Yuan, R. Ma, X. Q. Li, S. Y. Cheng, L. Jiang, L. X. Feng and Z. Q. Fan, Rod-like aggregates from polystyrene-b-poly(4-vinylpridine)-b-polystyrene triblock copolymer in aqueous media, Chin. J. Polym. Sci. In Press . Google ScholarJ. J. Yuanet al., Eur. Polym. J. 38, 1537 (2002). Crossref, Google Scholar FiguresReferencesRelatedDetails Recommended Vol. 04, No. 03 Metrics History KeywordsBlock CopolymerSelf-AssemblyMicellar AggregatesVesiclesPDF download