Search Results

You are looking at 1 - 10 of 58 items for :

  • "dynamic mechanical analysis (DMA)" x
  • Refine by Access: All Content x
Clear All

Abstract  

DMA and solid state 13C NMR techniques were used to measure historical parchment samples within the framework of the project (MAP) Micro Analysis of Parchment (EC contract No. SMT4-96-2101) in collaboration with the School of Conservation in Copenhagen. DMA was used in both thermal scan and creep modes. Thermal scans provided information on the transitions associated with the collagen polymer. Microthermal analysis was also used to obtain information on the topography and thermal conductivity of sample areas of 100 μm. Localised heating enabled measurements of softening transitions in the sample. This behaviour is influenced by the chemical composition of parchment. 13C NMR provided information on the carbon atoms associated with the polypeptide chains of the collagen in parchment. The behaviour of samples immersed in water and measured in DMA creep mode was used to measure the shrinkage behaviour of the parchment samples. The different but complementary techniques provided a means for characterising the physicochemical state of parchment samples.

Restricted access

), differential scanning calorimetry (DSC), Micro Hot Table (MHT), thermo-mechanical analysis (TMA), and dynamic mechanical analysis (DMA), are potentially useful to conservation scientist (see, for example [ 7 ]). In this article, the results reported in the

Restricted access

heating rates of 10 °C min −1 and nitrogen purge of 100 mL min −1 were employed. Dynamic mechanical analysis (DMA) experiments were performed on the polymer film specimens (20 mm long, 10 mm wide, and 30–40 μm thick) on a PerkinElmer Diamond apparatus

Restricted access
Journal of Thermal Analysis and Calorimetry
Authors: Veridiana Reyes-Zamudio, Carlos Angeles-Chávez, and Jorge Cervantes

techniques [differential thermal analysis (DTA), thermogravimetry (TG), and dynamic mechanical analysis (DMA)] and supplementing the information with X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and environmental scanning electron

Restricted access

indium. The results were analysed using the STAR e software supplied by Mettler-Toledo. The model free kinetics isoconversional method was used to analyze chemical cure kinetics. Dynamic mechanical analysis (DMA) experiments

Restricted access

segments. Both of these processes can be investigated using differential scanning calorimetry (DSC). The glass transition region can be investigated very well using dynamic mechanical analysis (DMA). However, Saiani et al. [ 2 ] indicate that

Restricted access

DSC30 equipment for samples with ca. 5.0 mg from −120 to 200 °C at 10 °C min −1 and using N 2 . Dynamical mechanical analysis (DMA) was performed in three point bending using a Perkin Elmer DMA 7 from −40 to 150 °C at 5 °C min −1 , frequency of 1 Hz

Restricted access

CTFE content have been characterized by a series of thermal analysis techniques, including Thermogravimetric analysis (TG), Differential scanning calorimetry (DSC), Dynamic mechanical analysis (DMA), and Thermal mechanical analysis (TMA). The work

Restricted access

cellulose long fibers (CLF)-based PLA composites prior to fiber orientation. Thermal analysis techniques such as thermo gravimetric analysis (TG), differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA) were used to characterize the

Restricted access

hot stage. Dynamic mechanical analysis (DMA) of the cured system was performed with a dynamic mechanical thermal analyzer (NETZSCH DMA 200). The frequency and amplitude of the vibration were adjusted to 2.5 Hz and 7.5 μm, respectively. The heating rate

Restricted access