Abstract
A versatile strategy for the preparation of end-functional polymers and block copolymers by radical exchange reactions is described. For this purpose, first polystyrene with 2,2,6,6-tetramethylpiperidine-1-oxyl end group (PS-TEMPO) is prepared by nitroxide-mediated radical polymerization (NMRP). In the subsequent step, these polymers are heated to 130 °C in the presence of independently prepared TEMPO derivatives bearing hydroxyl, azide and carboxylic acid functionalities, and polymers such as poly(ethylene glycol) (TEMPO-PEG) and poly(ε-caprolactone) (TEMPO-PCL). Due to the simultaneous radical generation and reversible termination of the polymer radical, TEMPO moiety on polystyrene is replaced to form the corresponding end-functional polymers and block copolymers. The intermediates and final polymers are characterized by 1H NMR, UV, IR, and GPC measurements.
Original language | English |
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Pages (from-to) | 2387-2395 |
Number of pages | 9 |
Journal | Journal of Polymer Science, Part A: Polymer Chemistry |
Volume | 57 |
Issue number | 24 |
DOIs | |
Publication status | Published - 15 Dec 2019 |
Bibliographical note
Publisher Copyright:© 2019 Wiley Periodicals, Inc.
Funding
This work was supported by the Istanbul Technical University Research Fund (Project No. 41873).
Funders | Funder number |
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Istanbul Technical University Research Fund | 41873 |
Keywords
- block copolymer
- nitroxide mediated radical polymerization
- radical coupling
- stable radical
- telechelic polymer