Subtle End Group Functionalization of Polymer Chains Drives Surface Depletion of Entire Polymer Chains
| Autor: | Mark D. Foster, Chrys Wesdemiotis, Kevin J. Endres, John Meyerhofer, Jacob A. Hill, Qiming He |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Polymers and Plastics Organic Chemistry 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Mass spectrometry 01 natural sciences 0104 chemical sciences Inorganic Chemistry End-group chemistry.chemical_compound Chemical engineering chemistry Materials Chemistry Surface modification Hydroxymethyl Surface layer Polystyrene 0210 nano-technology Repeat unit |
| Zdroj: | ACS Macro Letters. 7:795-800 |
| ISSN: | 2161-1653 |
| DOI: | 10.1021/acsmacrolett.8b00394 |
| Popis: | The surface of a blend of 6 kDa polystyrene and 6 kDa polystyrene functionalized with hydroxymethyl ends not only is depleted of the higher energy end groups but also is depleted of any segments belonging to the functionalized chains. This is demonstrated using the emerging technique of surface layer matrix-assisted laser desorption ionization time-of-flight mass spectrometry (SL-MALDI-ToF-MS), which detects entire chains that have any repeat unit at the outer surface, and requires no labeling. Detecting entire chains provides information about the relationship of chain functionalization to surface segregation behavior of entire chains. That the surface is depleted of interior segments of functionalized chains as well as of the ends is remarkable, since the functionality at the single chain end involves less than 0.5 wt % of the functionalized polymer chain. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|