Self-aggregation behavior of well-defined PEO-based amphiphilic tri-block copolymers and their application as metal detectors

PMMA-b-PEO-b-PMMA tri-block copolymers were synthesized by anionic polymerization technique usingtelechelic1,1-diphenylethylene-terminated poly (ethylene oxide)as macroinitiators and Sec-BuLi four tri-block copolymers of PMMA-b-PEO-b-PMMA with different number average molecular weight ( M ¯ n ) were...

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Bibliographic Details
Published in:Journal of macromolecular science. Part A, Pure and applied chemistry Pure and applied chemistry, 2024-12, Vol.61 (12), p.1085-1094
Main Authors: Das, Palash Jyoti, Kumawat, Vishnu, Singla, Manisha, Singh, M. Ramananda, Chandra Mohapatra, Subash
Format: Article
Language:English
Subjects:
amphiphilic tri-block copolymers
Anionic polymerization
Aqueous solutions
Block copolymers
Chemical synthesis
core-shellmicelles
Ethylene oxide
Hydrophobicity
metal ion detector
NMR
Nuclear magnetic resonance
Polymethyl methacrylate
Reducing agents
Reverse micelles
Self-assembly
Spherical shells
telechelic-poly (ethylene oxide), PMMA
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Summary:PMMA-b-PEO-b-PMMA tri-block copolymers were synthesized by anionic polymerization technique usingtelechelic1,1-diphenylethylene-terminated poly (ethylene oxide)as macroinitiators and Sec-BuLi four tri-block copolymers of PMMA-b-PEO-b-PMMA with different number average molecular weight ( M ¯ n ) were synthesized, and the structure of the macroinitiators and polymers was confirmed by FTIR. and 1 H NMR spectroscopic methods. Through the solvent-induced association, the aqueous solutions of PMMA-b-PEO-b-PMMA were formed. After that, hydrodynamic diameter, DLS and TEM were used to study the morphology of the resulting aqueous solutions. The polymer's self-assembled nanostructures of core-shell flower-like spherical micelles structures were observed. Also, the PMMA hydrophobic content of the tri-block increases steadily and the core size of the micelles decreases significantly, due to reverse micelle formation in which the core is hydrophobic PMMA blocks and the corona is PEO block. This micelle is an excellent detector for metal ions and acts as a reducing agent for them to convert into pure nontoxic nanoparticles.
ISSN:1060-1325
1520-5738
DOI:10.1080/10601325.2024.2431933