Definition of S' and S"
S' is called the storage modules ,elastic modulus or in phase modulus. S" is called the loss modulus, viscous modulus, or out-of-phase modulus. All of these terms have been used to mean the same thing. The unit of S' and S" in the product family instruments are in lbs. These are units of torque. They can also be in dnm. Which are also torque units.
Tan Delta
The Tan(Delta) is computed from the ratio S"/S' or loss of modulus divided by storage modulus. The smaller the Tan delta, then the more viscous the material.
Application of S"
There have been many research articles which discuss the benefits of using S"(Loss modulus) or Tan (Delta). A relationship may exists between dynamic properties and processability (e.g. die swell) of uncured compound. After cure, the loss modulus can indicate whether a compound will meet some special application. For example, the rubber used in an automotive engine mount should have high Tan(Delta). S" in order to dampen vibration. On the other hand, the compound used in a rubber band needs a low Tan Delta .
Application And Information Available | |
Elastic Modulus S' | Viscous Modulus S" |
Tan Delta | Cure Rate |
Tan Delta@ML | Tan Delta@ MH |
Ts1,Ts2,Ts5,Tc10,Tc50,Tc 90 | OC,End Temp.Trend,Reversion, |
Display of S', S" along with Tan Delta | Cp, Cpk Values |
Computer Controlled Automated testing | Rotor Less |
Repeatability-Continues repeated testing |
Specification | Advance Testing Technology |