Graphene Oxide's Reduction of Hydrolytic Degradation in Polyamide-11
Graphene oxide (GO) was incorporated into polyamide-11 (PA11) via in-situ polymerization. The GO-PA11 nano-composite had elevated resistance to hydrolytic degradation. At a loading of 1 mg/g, GO to PA11, the accelerated aging equilibrium molecular weight of GO-PA11 was higher (33 and 34 kDa at 100 and 120 °C, respectively) compared to neat PA11 (23 and 24 kDa at 100 and 120 °C, respectively). Neat PA11 had hydrolysis rate constants (kH) of 2.8 and 12 (×10-2 day-1) when aged at 100 and 120 °C, respectively, and re-polymerization rate constants (kP) of 5.0 and 23 (×10-5 day-1), respectively. The higher equilibrium molecular weight for GO-PA11 loaded at 1 mg/g was the result of a decreased kH, 1.8 and 4.5 (×10-2 day-1), and an increased kP, 10 and 17 (×10-5 day-1) compared with neat PA11 at 100 and 120 °C, respectively. The decreased rate of degradation and resulting 40 % increased equilibrium molecular weight of GO-PA11 was attributed to the highly asymmetric planar GO nano-sheets that inhibited the molecular mobility of water and the polymer chain. The crystallinity of the polymer matrix was similarly affected by a reduction in chain mobility during annealing due to the GO nanoparticles' chemistry and highly asymmetric nano-planar sheet structure.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2017 |
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| Erschienen: |
2017 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:126 |
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| Enthalten in: |
Polymer - 126(2017) vom: 22. Sept., Seite 248-258 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Hocker, Samuel Ja [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Revised 10.01.2021 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1016/j.polymer.2017.08.034 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM312898371 |
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| 500 | |a published: Print-Electronic | ||
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| 520 | |a Graphene oxide (GO) was incorporated into polyamide-11 (PA11) via in-situ polymerization. The GO-PA11 nano-composite had elevated resistance to hydrolytic degradation. At a loading of 1 mg/g, GO to PA11, the accelerated aging equilibrium molecular weight of GO-PA11 was higher (33 and 34 kDa at 100 and 120 °C, respectively) compared to neat PA11 (23 and 24 kDa at 100 and 120 °C, respectively). Neat PA11 had hydrolysis rate constants (kH) of 2.8 and 12 (×10-2 day-1) when aged at 100 and 120 °C, respectively, and re-polymerization rate constants (kP) of 5.0 and 23 (×10-5 day-1), respectively. The higher equilibrium molecular weight for GO-PA11 loaded at 1 mg/g was the result of a decreased kH, 1.8 and 4.5 (×10-2 day-1), and an increased kP, 10 and 17 (×10-5 day-1) compared with neat PA11 at 100 and 120 °C, respectively. The decreased rate of degradation and resulting 40 % increased equilibrium molecular weight of GO-PA11 was attributed to the highly asymmetric planar GO nano-sheets that inhibited the molecular mobility of water and the polymer chain. The crystallinity of the polymer matrix was similarly affected by a reduction in chain mobility during annealing due to the GO nanoparticles' chemistry and highly asymmetric nano-planar sheet structure | ||
| 650 | 4 | |a Journal Article | |
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| 700 | 1 | |a Smith, Patrick |e verfasserin |4 aut | |
| 700 | 1 | |a Komatsu, Chris |e verfasserin |4 aut | |
| 700 | 1 | |a Dickinson, Laura R |e verfasserin |4 aut | |
| 700 | 1 | |a Schniepp, Hannes C |e verfasserin |4 aut | |
| 700 | 1 | |a Kranbuehl, David E |e verfasserin |4 aut | |
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