Modulus dissipation factor

Modulus, dissipation factor Also called loss tangent. It is the ratio of the loss modulus to static modulus of a material under dynamic load. It is proportional to damping capacity. 

Dielectric strength, kV mm Electrical Volume (dc) resistivity, ohm-cm Dielectric constant (60 Hz) Dielectric constant (10 Hz) Dissipation (power) factor (60 Hz) Dissipation factor (10 Hz) Mechanical Compressive modulus, 10Mb in-2 9.8-12 24-31 16-24 1014-1016 4.5-6.0 19 335-600 14 ... 

Laminate T °C GTE below ppm/°C Water uptake, MIL-P-13949F, mg Dielectric constant at IMH2 Dissipation factor at 1 MH2 Tensde strength, MPa " Modulus of elasticity, GPa Thermal conductivity, W/(m-K)... 

G is called the loss modulus. It arises from the out-of-phase components of y and T and is associated with viscous energy dissipation, ie, damping. The ratio of G and G gives another measure of damping, the dissipation factor or loss tangent (often just called tan 5), which is the ratio of energy dissipated to energy stored (eq. 16). 

T and are the glass-transition temperatures in K of the homopolymers and are the weight fractions of the comonomers (49). Because the glass-transition temperature is directly related to many other material properties, changes in T by copolymerization cause changes in other properties too. Polymer properties that depend on the glass-transition temperature include physical state, rate of thermal expansion, thermal properties, torsional modulus, refractive index, dissipation factor, brittle impact resistance, flow and heat distortion properties, and minimum film-forming temperature of polymer latex... 

Dielectric constant and dissipation factor measurements were conducted according to the procedures of ASTM D-150-87. Tensile strength and modulus and percent elongation were measured on an Instron model 1125 according to the procedures of ASTM-D-882-83. 

The imaginary part of the modulus, also called the loss modulus, is a damping term which determines the dissipation of energy as heat upon deformation. G"/G is called the dissipation factor and is proportional to the ratio of energy dissipated per cycle to the maximum potential energy stored during a cycle. 

Flexural modulus, MPa Coefficient of thermal expansion, K-1 Dielectric constant (60 Hz to 2 GHz) Dissipation factor (60 Hz to 2 GHz)... 

Dielectric constant (60 Hz) Dielectric constant (106Hz) Dissipation (power) factor (60 Hz) Dissipation factor (106Hz) Mechanical Compressive modulus, 103lb in-2 ... 

Orientation decreases electrical dissipation factors in the direction of the orientation, and increase occurs perpendicular to orientation. Since modulus changes in the opposite way, this indicates that polar vibrations along a stretched plastic molecule are decreased, while transverse vibrations between the stretched molecules are increased. 

Fig. 6 Tensile storage modulus and dissipation factor tan 6 several types of PVC/PHMA graded blends.

Water absorption of the resultant cured materials was measured after immersion for 24 hrs at room temperature and reported as % weight gain. The modulus was measured according to ASTM D 2240, and the dielectric constant and dissipation factor were measured using a method similar to ASTM D 150. Glass and melting transitions were measured by differential scanning calorimetry (DSC). The thermal stability was determined in a forced air oven... 

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