Anmelden

Open Access

  • Startseite
  • Suchen
  • Browsen
  • Veröffentlichen
  • Hilfe

Filtern

Autor

  • Elert, Anna Maria (2)
  • Becker, Roland (1)
  • Braun, Ulrike (1)
  • Dümichen, Erik (1)
  • Eisentraut, Paul (1)
  • Falkenhagen, Jana (1)
  • Sturm, Heinz (1)
  • Theiler, Geraldine (1)
  • Wachtendorf, Volker (1)
  • Weidner, Steffen (1)
+ weitere

Erscheinungsjahr

  • 2018 (1)
  • 2017 (1)

Referierte Publikation

  • ja (2) (entfernen)

Schlagworte

  • Analysis and identification (1)
  • FTIR imaging (1)
  • Friction (1)
  • Humidity (1)
  • Microplastics (1)
  • Photooxidation (1)
  • Raman imaging (1)
  • SEC (1)
  • TED-GC-MS (1)
  • TPU (1)
+ weitere

Organisationseinheit der BAM

  • 1 Analytische Chemie; Referenzmaterialien (2) (entfernen)

2 Treffer

  • 1 bis 2
  • CSV
  • RIS
  • 10
  • 20
  • 50
  • 100

Sortieren nach

  • Jahr
  • Jahr
  • Titel
  • Titel
  • Autor
  • Autor
Effects of UV radiation on the friction behavior of thermoplastic polyurethanes (2018)
Theiler, Geraldine ; Wachtendorf, Volker ; Elert, Anna Maria ; Weidner, Steffen
The effects of weathering exposure on unfilled and filled thermoplastic polyurethanes (TPU) materials are described as performed under different humidity conditions. For this purpose, a weathering device was used with UV-A 340 nm lamps at a constant temperature of 40 °C. The effects of environmental (UV and humidity condition) degradation on the frictional properties of TPU materials are presented along with surface analyses to characterize the chemistry of the degradative process. Photooxidative degradation of unfilled polymer leads to deterioration of physical and mechanical properties, which affects its tribological behavior significantly. Due to crosslinking, the stiffness of the material increases, reducing drastically the friction coefficient of unfilled TPUs. The frictional behavior of glass fiber reinforced TPU is less affected by radiation.
Comparison of different methods for MP detection: What can we learn from them, and why asking the right question before measurments matters? (2017)
Elert, Anna Maria ; Becker, Roland ; Dümichen, Erik ; Eisentraut, Paul ; Falkenhagen, Jana ; Sturm, Heinz ; Braun, Ulrike
In recent years, an increasing trend towards investigating and monitoring the contamination of the environment by microplastics (MP) (plastic pieces < 5 mm) has been observed worldwide. Nonetheless, a reliable methodology that would facilitate and automate the monitoring of MP is still lacking. With the goal of selecting practical and standardized methods, and considering the challenges in microplastics detection, we present here a critical evaluation of two vibrational spectroscopies, Raman and Fourier transform infrared (FTIR) spectroscopy, and two extraction methods: thermal extraction desorption gas chromatography mass spectrometry (TED-GC-MS) and liquid extraction with subsequent size exclusion chromatography (SEC) using a soil with known contents of PE, PP, PS and PET as reference material. The obtained results were compared in terms of measurement time, technique handling, detection limits and requirements for sample preparation. The results showed that in designing and selecting the right methodology, the scientific question that determines what needs to be understood is significant, and should be considered carefully prior to analysis. Depending on whether the object of interest is quantification of the MP particles in the sample, or merely a quick estimate of sample contamination with plastics, the appropriate method must be selected. To obtain overall information about MP in environmental samples, the combination of several parallel approaches should be considered.
  • 1 bis 2

OPUS4 Logo

  • Kontakt
  • Impressum
  • Sitelinks