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| Home > Publications database > Synthesis and characterization of low molar mass end-functionalized homo- and copolymers with ureidopyrimidone, UPy groups |
| Journal Article | FZJ-2020-02126 |
; ; ; ; ; ; ;
2020
Springer
Heidelberg
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Please use a persistent id in citations: doi:10.1007/s00396-020-04642-3
Abstract: Anionic polymerization techniques along with functional initiation and/or functional termination reactions were employed for thesynthesis of end-functionalized polymers composed from polystyrene (PS), polyisoprene-1,4 (PI), and polybutadiene-1,4 (PBd)chains bearing –OH end groups. Specifically, PS-OH, HO-PS-OH homopolymers, PS-b-PI-OH and PI-b-PS-OH block copolymers,HO-PS-b-PI-b-PS-OH triblock copolymers, and PS(PBd-OH)2 miktoarm star copolymers were prepared. The –OHfunctions were transformed into 2–ureido–4–pyrimidone, UPy, groups leading to the synthesis of the corresponding functionalizedpolymers. The UPy groups interact through the formation of strong hydrogen bonds. The aggregation behavior of selectedsamples was studied by a variety of techniques, such as size exclusion chromatography, dilute solution viscometry, dynamic lightscattering, differential scanning calorimetry, thermogravimetric analysis, melt rheology, small angle X-ray scattering, and atomicforcemicroscopy. It was found that in the solid state and in non-polar solvents, the UPy-terminated chains associate leading to theformation of dimers and larger aggregates. This systematic study presents a library of useful materials for potential applicationsand for fundamental studies linking associations, molecular structure, and macroscopic properties.
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