【Basic Knowledge of Terminology Explanations for “Polymers and Materials”-001】: Terminology Explanations Related to Rubber
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This post was last edited by ljtjbx on 2015-8-4 at 10:29. We hope that fellow sailors will actively contribute more posts! ! --A humble attempt to stimulate further discussion·········· Sulfurization: the process by which rubber is transformed from linear long-chain molecules into networked macromolecules. Mennic viscosity: It characterizes the torque exerted on a sample as it deforms between a moving surface and a fixed surface under certain temperature, pressure, and time conditions. Specific tensile strength: The external force required to stretch the rubber to a certain length. Scorching: An early vulcanization phenomenon that occurs in rubber compounds during storage or handling. The cause of scorching is an improper design of the combination of rubber and vulcanization system; secondly, it is due to improper processing methods, such as repeated exposure to high temperatures and prolonged processing times, as well as excessive storage at high temperatures.
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What is the relationship between the Mooney viscosity of rubber and its properties?
Mennig viscosity can essentially reflect the degree of polymerization and molecular weight of synthetic rubber. The Mennic viscosity is related to the processing properties of rubber, as well as its molecular weight and the range of molecular weight distribution. Rubbers with high Mennic viscosity are difficult to mix uniformly and process by extrusion, as they have a high molecular weight and a wide molecular weight distribution. Rubbers with low Mennig viscosity tend to stick to the rolls, as they have a low molecular weight and a narrow molecular weight distribution. If the Mennig viscosity is too low, the tensile strength of the cured product is low. The Mennig viscosity-time curve also reveals the vulcanization process properties of the rubber compound. Mannix viscosity has a direct impact on the processing properties of rubber; generally, rubber materials have an appropriate range for this value, as either too high or too low a value is not conducive to processing