Nitroxide‐mediated Living Radical Polymerization of Styrene with Fluorescent Initiator
| العنوان: | Nitroxide‐mediated Living Radical Polymerization of Styrene with Fluorescent Initiator |
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| المؤلفون: | Wolf D. Habicher, Štefan Chmela, Meizhen Yin, L’ubica Búcsiová |
| المصدر: | Journal of Macromolecular Science, Part A. 45:761-768 |
| بيانات النشر: | Informa UK Limited, 2008. |
| سنة النشر: | 2008 |
| مصطلحات موضوعية: | Kinetic chain length, Nitroxide mediated radical polymerization, Polymers and Plastics, Bulk polymerization, Chemistry, Radical polymerization, Chain transfer, General Chemistry, Photochemistry, Living free-radical polymerization, Polymer chemistry, Materials Chemistry, Ceramics and Composites, Living polymerization, Reversible addition−fragmentation chain-transfer polymerization |
| الوصف: | A fluorescence method was used for determination of marked chain ends in polystyrene samples prepared by 4‐substituted TEMPO type nitroxide‐mediated living free radical polymerization of styrene. 2,2,6,6‐Tetramethyl‐1‐(1‐phenylethoxy)‐piperidin‐4‐yl‐4‐pyren‐1‐ylbutanoate (PYNOR) was prepared and used as an unimolecular initiator bearing pyrene as a fluorescence mark on mediating nitroxide fragment. The bulk polymerization of styrene at 120°C, in the presence of new unimolecular initiator, was a typical nitroxide mediated living radical polymerization. For comparison, two different molar ratios of initiator and monomer (1∶400 and 1∶1000 initiator ‐ monomer [I:M]) were used for polymerization. When I:M=1∶400, the obtained polydispersity was 1.12 and maximum molecular weight 27,000 g/mol was obtained at 62% conversion. For ratio 1∶1000, slightly higher polydispersity was obtained −1.26 and the molecular weight was 53,000 g/mol at 70% conversion. The content of the polystyrene chains bearing mediating nitroxi... |
| تدمد: | 1520-5738 1060-1325 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::7d5aaaade0d512f888fc987a418fb62cTest https://doi.org/10.1080/10601320802222897Test |
| رقم الانضمام: | edsair.doi...........7d5aaaade0d512f888fc987a418fb62c |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15205738 10601325 |
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