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Synthesis and Characterization of Well-Defined, Tadpole-Shaped Polystyrene with a Single Atom Junction Point
- Source :
- Macromolecules. 51:9509-9518
- Publication Year :
- 2018
- Publisher :
- American Chemical Society (ACS), 2018.
-
Abstract
- An efficient method for synthesis of well-defined, well-characterized, tadpole-shaped polystyrene with a single atom junction point that is optimal for the study of dynamics has been developed using anionic polymerization, silicon chloride linking chemistry, and metathesis ring closure. The difunctional macromolecular linking agent, ω-methyldichlorosilylpolystyrene, was formed by reacting sec-butyllithium-initiated poly(styryl)lithium with excess (30×) methyltrichlorosilane to eliminate formation of linear dimer and three-arm star polystyrene. The asymmetric, three-arm, star precursor was formed by linking excess α-4-pentenylpoly(styryl)lithium (α-PSLi) with the macromolecular linking agent, and the excess α-PSLi functionalized with ethylene oxide before termination with methanol to facilitate chromatographic separation. Cyclization of the three-arm, star precursor to form tadpole-shaped polystyrene was effected in methylene chloride at high dilution using the Grubbs first generation catalyst, bis(tricycl...
- Subjects :
- Polymers and Plastics
Ethylene oxide
Organic Chemistry
chemistry.chemical_element
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Metathesis
01 natural sciences
0104 chemical sciences
Methyltrichlorosilane
Inorganic Chemistry
chemistry.chemical_compound
Anionic addition polymerization
chemistry
Polymer chemistry
Materials Chemistry
Lithium
Polystyrene
Methylene
0210 nano-technology
Macromolecule
Subjects
Details
- ISSN :
- 15205835 and 00249297
- Volume :
- 51
- Database :
- OpenAIRE
- Journal :
- Macromolecules
- Accession number :
- edsair.doi...........481698576c73c6d5e2bba8853babd870