Academic Journal
Initiation and Polymer Density of Conjugated Polymer Brushes
| العنوان: | Initiation and Polymer Density of Conjugated Polymer Brushes |
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| المؤلفون: | Vonwald, I.A., Frye, S.G., Moog, M.M., Donley, C.L., Tsui, F., You, W. |
| المساهمون: | College of Arts and Sciences, Department of Chemistry, College of Arts and Sciences, Department of Physics and Astronomy, College of Arts and Sciences, Department of Applied Physical Sciences |
| المصدر: | Journal of Physical Chemistry B, 124(43) |
| بيانات النشر: | American Chemical Society |
| سنة النشر: | 2020 |
| المجموعة: | Carolina Digital Repository (UNC - University of North Carolina) |
| مصطلحات موضوعية: | Grafting densities, Polymer densities, Poly (3-methylthiophene), Polymer films, Growth mechanisms, Poly (3-hexylthiophene), Rutherford backscattering spectroscopy, Monolayers, X ray photoelectron spectroscopy, Polymerization, Metal halides, Turnover frequency, Dendrimers, Rutherford backscattering spectrometry, Polymer molecular weight, Conjugated polymers |
| الوصف: | The growth mechanism and polymer density in conjugated polymer brush (CPB) films composed of poly(3-methylthiophene) (P3MT) are characterized. X-ray photoelectron spectroscopy experiments show that the initiation of aryl halide monolayers by Pd(PtBu3)2 produces disproportionated monolayer initiators. Unlike disproportionated species formed during the solution-phase initiation of aryl halides, which cannot mediate polymerization, the surface-bound initiators catalyze polymerization to form CPB films with a high grafting density (1.2 nm-2). Rutherford backscattering spectrometry (RBS) experiments show that P3MT CPB films have a characteristic monomer volume density (3.7 nm-3) that is indistinguishable from the volume density of spuncast poly(3-hexylthiophene) films. Using these RBS and XPS results, characteristics of P3MT CPB growth are obtained, including the turnover frequency (7.5 h-1) and polymer molecular weight (300 g/mol·nm). |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | https://doi.org/10.17615/xsxq-xc80; https://cdr.lib.unc.edu/assets/work-ff055336041c3f7d310ad69109eda4a887b16ec501f35afc0a547c4adb97ee72.png |
| DOI: | 10.17615/xsxq-xc80 |
| الاتاحة: | https://doi.org/10.17615/xsxq-xc80 https://cdr.lib.unc.edu/assets/work-ff055336041c3f7d310ad69109eda4a887b16ec501f35afc0a547c4adb97ee72.png |
| رقم الانضمام: | edsbas.F013EAA3 |
| قاعدة البيانات: | BASE |
| DOI: | 10.17615/xsxq-xc80 |
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