[ASTM] D6204 - Rubber - Measurement of Unvulcanized Rheological Properties Using Rotorless Shear Rheometer
Writer : Matt Seo(salt@light-salt.kr) Date : 21.07.12 Hit : 905
Tags : ASTM D6204,ASTM D2084,Moving Die Rheometer,MDR,Rheology,rubber
Attachments :
Rubber - Rotorless Shear Rheometers
ASTM D 6204: Standard Test Method for Rubber - Measurement of Unvulcanized Rheological Properties Using Rotorless Shear Rheometers
This standard covers the use of rotorless oscillation shear rheometers to measure and analysis of the flow properties of rubber and rubber compounds. These rheological properties of materials are critical in factory processing procedures.
Test Method
ASTM D6204 - Section 4. Summary of Test Method: 4.1 A rubber test specimen is contained in a die cavity that is closed and maintained at an elevated temperature. The cavity is formed by two dies, one of which is oscillated through a rotary amplitude. This action produces a sinusoidal torsional strain in the test specimen, resulting in a sinusoidal torque, which measures a viscoelastic quality of the test specimen. The test specimen can be either a raw natural or synthetic rubber or an uncured rubber compound.
Apparatus
ASTM D6204 - Section 6.Apparatus: 6.1 Torsion Strain Rotorless Oscillating Rheometer With a Sealed Cavity?This type of rheometer measures the elastic torque S’ and viscous torque S” produced by oscillating angular strain of set amplitude and frequency in a completely closed and sealed test cavity.
The standard covers everything from the sealed die cavitiy, closing mechanism, die gap, torque measuring system etc.