Rubber Mooney value is what meaning, what is the role of
In accordance with the provisions of the standard GB 1232 (Mooney viscosity), rotation expressed by the symbol Z100 C 1+4. Where Z rotational viscosity; 1, preheating time is 1min; 4 - rotation time is 4min; 100 C - test temperature of 100 degrees.In our country, usually with ML100 or MS100 1+4 to 1+4 DEG C said. M said L Mooney, represented by the greater trochanter, S said with a small rotor.1 preheat for 1 minutes, 4 said that the test for 4 minutes. The larger the value of Mooney viscosity, said, the plastic is widely used as a low. Index control process performance of rubber.
Reflect the level and distribution of Mooney viscosity and molecular weight range is narrow rubber processing performance. High Mooney viscosity of rubber is not easy mixing and uniform extrusion processing, the high molecular weight and wide distribution. Low Mooney viscosity glue sticky roller, its low molecular weight and narrow distribution. The tensile strength of low Mooney viscosity too low after curing. The Mooney viscosity time curve can be seen the performance of rubber vulcanization process.
Mooney viscosity (Mooney viscosity) also called rotation (Mooney) is determined by numerical viscosity, Mooney viscometer, synthetic rubber can basically reflect the degree of polymerization and molecular weight. The rotor is a standard Mooney viscometer, at a constant speed (2 RPM), rotating in a closed chamber in the sample the viscosity change of shear resistance. The size of the sample and the rotation of the rotor during the curing process, through the force measuring device is displayed on the dial to Mooney units, at the same time interval can be read Mooney, vulcanization curve, door number rose after the first drop, 5 unit increase in the time from the lowest point called the Mooney scorch time, the Mooney scorch and then increased to 30 units and the time that scorch time.
