Rheology is a broad category of physics involving various types of instruments to help describe the flow behavior of just about any type of matter. Most rheologists are concerned with viscosity: a material’s resistance to flow, viscoelasticity: the tendency of a substance to flow under some conditions and snap...
Read More >>Heating Rate in DSC
Engineered materials are becoming more complex in attempts to heat increasing needs, such as enhanced physical properties. With that, their characterization is becomes increasingly difficult. Differential scanning calorimetry (DSC) is a thermal analysis technique which tells of various thermal properties of a material such as phase transition temperatures. Many...
Read More >>Tensile Testing Yarn
Tensile strength is defined as the strength of a material under tension (pulling) as distinct from compression, torsion, or shear. The definition is vague because it covers a wide range of properties including Breaking force, Breaking strength, Breaking tenacity, Breaking toughness, Chord modulus, Elongation, Elongation at break, Elongation at...
Read More >>NIR Spectroscopy in the Food Industry
The infrared spectrum can be classified into three regions: near, mid, and far IR. Fourier-Transform Infrared Spectroscopy (FT-IR) typically uses mid- and far-infrared wavelengths to characterize specific bonds in a material. This method is most commonly used to identify organic and polymeric materials. Near IR is not as commonly...
Read More >>Percent Crystallinity by the XRD Integration Method
X-ray diffraction experiments can be explained by Bragg’s law. The reflected x-rays from long-range crystallographic order planes can be predicted using the following equation. Where n is an integer, λ is the wavelength of the incident x-rays, d is the inter-atomic spacing, and θ is the angle of incidence....
Read More >>Determination of % Crystallinity in Polymers
*All of the information for this post was gathered from the sources listed below. Please use them for further reading on the subject. The physical properties of a polymeric sample, such as density, ductility, and yeild strength, are all highly dependent on the amount of crystalline material (often called...
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