Rubber compounding ingredients. Organic chemicals. General test methods

2010 ◽  
Keyword(s):  
Test Methods ◽  
Organic Chemicals ◽  
General Test

scholarly journals Considerations on the Applicability of Test Methods for Mechanical Characterization of Materials Manufactured by FDM

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 28 ◽  
Author(s):  
Amabel García-Domínguez ◽  
Juan Claver ◽  
Ana María Camacho ◽  
Miguel A. Sebastián
Keyword(s):  
Additive Manufacturing ◽  
Mechanical Characterization ◽  
Test Methods ◽  
Fused Deposition Modelling ◽  
Fused Deposition ◽  
General Test ◽  
Specific Standard ◽  
Characterization Of Materials ◽  
Definition Of

The lack of specific standards for characterization of materials manufactured by Fused Deposition Modelling (FDM) makes the assessment of the applicability of the test methods available and the analysis of their limitations necessary; depending on the definition of the most appropriate specimens on the kind of part we want to produce or the purpose of the data we want to obtain from the tests. In this work, the Spanish standard UNE 116005:2012 and international standard ASTM D638–14:2014 have been used to characterize mechanically FDM samples with solid infill considering two build orientations. Tests performed according to the specific standard for additive manufacturing UNE 116005:2012 present a much better repeatability than the ones according to the general test standard ASTM D638–14, which makes the standard UNE more appropriate for comparison of different materials. Orientation on-edge provides higher strength to the parts obtained by FDM, which is coherent with the arrangement of the filaments in each layer for each orientation. Comparison with non-solid specimens shows that the increase of strength due to the infill is not in the same proportion to the percentage of infill. The values of strain to break for the samples with solid infill presents a much higher deformation before fracture.

Studies of the influence factors on the coloring properties of black carrot powder

2021 ◽  
pp. 32-39
Author(s):  
I.A. Tarasova
Keyword(s):  
Storage Temperature ◽  
Light Exposure ◽  
Aqueous Suspension ◽  
Influence Factors ◽  
Storage Conditions ◽  
Test Methods ◽  
Black Carrot ◽  
Ph Values ◽  
General Test

The article presents materials on the infl uence of storage conditions on the technological and consumer properties of natural anthocyanin dye extracted from black carrots. The solubility of the dye in various media was studied. It was found that anthocyanins do not completely dissolve in alcohol, the solubility point of the powder dye and the ratio of water to alcohol were determined. The dependence of the maximum optical density on acidity was studied when black carrot powder was dissolved in water and water with alcohol. Studies have been performed on changes in the color of an aqueous solution at diff erent pH values of an aqueous suspension prepared in accordance with GOST 2119.3-91 (ISO 787-9-81) General test methods for pigments and fillers. Determination of the pH of an aqueous suspension. Changes in the properties of the dye under different storage temperature conditions and the influence of light exposure were studied.

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