Influence of temperature and mesh configuration on rubber pull-out damage phenomenon

Release time：2022-05-04    Click：266

The temperature also has a great influence on the tensile fracture phenomenon of rubber. Above the glass transition temperature TG, in the high elastic temperature range and at a slow stretching speed, the tensile section exhibits large rough areas. At temperatures below Tg, the rubber is brittle and hard, and the fracture is completely brittle, with large smooth areas.

In addition, the greater the density of rubber mesh, the higher the elasticity, the smaller the rough area of the fracture section and the larger the smooth area when it breaks, and vice versa. Tensile fracture phenomenon is also related to the polar groups contained in the molecular structure of rubber, the more polar groups contained, the stronger the intermolecular force, the specimen fracture section has a larger elephant. Tensile fracture phenomenon is also related to the polar groups contained in the molecular structure of rubber, the more polar groups contained, the stronger the intermolecular force, the specimen fracture section has a large smooth area. For example, non-polar rubber with a relatively fast pulling (after a few minutes), the fracture section appears obvious rough area, while the smooth area of butyl rubber (containing 30% acrylic. For example, non-polar rubber with a fast pulling (after a few minutes), the pulling section appears obvious rough area, while the butyl rubber (containing 30% acrylonitrile), after 3 hours of slow stretching at 20°C, the pulling section appears rough area.