Polystyrene-Dendrimer Amphiphilic Block Copolymers with a Generation-Dependent Aggregation
- 16 June 1995
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 268 (5217), 1592-1595
- https://doi.org/10.1126/science.268.5217.1592
Abstract
A class of amphiphilic macromolecules has been synthesized by combining well-defined polystyrene (PS) with poly(propylene imine) dendrimers. Five different generations, from PS-dendr-NH2 up to PS-dendr-(NH2)32, were prepared in yields of 70 to 90 percent. Dynamic light scattering, conductivity measurements, and transmission electron microscopy show that in aqueous phases, PS-dendr-(NH2)32 forms spherical micelles, PS-dendr-(NH2)16 forms micellar rods, and PS-dendr-(NH2)8 forms vesicular structures. The lower generations of this class of macromolecules show inverted micellar behavior. The observed effect of amphiphile geometry on aggregation behavior is in qualitative agreement with the theory of Israelachvili et al. The amphiphiles presented here are similar in shape but different in size as compared with traditional surfactants, whereas they are similar in size but different in shape as compared with traditional block copolymers.This publication has 25 references indexed in Scilit:
- Synthesis and Characterization of 1,2-Dicarboxyethyl-Terminated PolystyreneMacromolecules, 1994
- Starburst/Cascade Dendrimers: Fundamental building blocks for a new nanoscopic chemistry setAdvanced Materials, 1994
- Functional Polymers and Dendrimers: Reactivity, Molecular Architecture, and Interfacial EnergyScience, 1994
- Chemische Umsetzungen im Inneren einer Vorstufe von unimolekularen Micellen: Bor‐Supercluster durch ortsspezifische Addition von B10H14 an KaskadenmoleküleAngewandte Chemie, 1994
- Aggregation and Critical Micellization Behavior of Carboxylate-Terminated Monochelic PolystyreneMacromolecules, 1994
- Book Review: UV-VIS Atlas of Organic Compounds. Part 1: Spectra A1/1C9/13. Part 2: Spectra D1/l-M19. 2nd Edition. Edited by H. -H. PerkampusAngewandte Chemie, 1993
- Association between polyether–polyamine block‐copolymers and low molecular weight polyacids in solutionPolymer International, 1993
- Size and solution behavior of sodium 10-undecenoate oligomersThe Journal of Physical Chemistry, 1993
- Neuartige Polyethercopolymere mit einer linearen Zentraleinheit und dendritischen EndgruppenAngewandte Chemie, 1992
- Emulsifying properties, of block copolymers. Oil‐water emulsions and microemulsionsPolymer Engineering & Science, 1977