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  • Understanding Thermal Gap Filler Pads, PCB Deflection, and Stress
    This paper focuses on the characteristics of gap fillers and how they impact a printed circuit board (PCB) including compression characteristics of various types of gap fillers, from standard viscoelastic materials, to putties, to form-in-place. PCBs are very flexible and deform quite easily; how
  • EVALUATING THE RETENTION OF VISCOELASTIC PROPERTIES FOR EXTREME AND LONG TERM SERVICE: A CASE STUDY IN POTASSIUM FORMATE.
    The objective of this test program was to review the potential physical and chemical ch. anges of three popular "high-performance" oilfield materials in potassium formate over a relatively short time period. Potassium formate is a popular completion fluid, on account of its benign environmental
  • Generation of Master Curves for Cured Rubber
    on the properties of viscoelastic materials. The master curve is created with data from a dynamic mechanical analyzer (DMA) that produces modulus (E) and loss (tan delta) values over a moderate range of frequencies and temperatures. The master curve predicts the dynamic behavior of the material over
  • Temperature Profile of Adhesive Film
    Temperature profiles provide information on the structural/viscoelastic behavior of a material as a function of temperature. Dramatic changes in viscoelastic properties help to identify the temperature at which curing/gelation/crosslinking begins.
  • Measurement and Prediction of Fluid Viscosities at High Shear Rates
    Polymeric materials in general are viscoelastic in nature because they exhibit strong depend-. ence of deformation and flow on time and temperature. Molecular structures in polymeric. materials undergo rearrangements when a load is applied in order to minimize localized. stresses imposed
  • Dynamic Shear Rheometers Pave the Way for Quality Asphalt Binders
    of the input. energy is dissipated in the material and results. in a permanent set. This is called viscoelastic behavior.
  • The Rheology of Pharmaceutical and Cosmetic Semi-Solids
    are ointments, creams, pastes, and gels-all. semisolids. Few rheological publications have addressed. the dominant viscoelastic nature of a semisolid material. in a detailed sense. To understand these complex flows,. commercial medical creams, shampoos, and a children's. cough syrup were tested using the S T R
  • Frequency Sweep PDMS
    Dynamic oscillation is one of the most popular means to determine the viscoelastic response of. materials. One of the features of the Stresstech HR is its ability to make measurements across a. wide range in frequency. Measurements at high frequencies for devices with separate active torque

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