Low temperature performance of vulcanized PVC

1. The cold resistance coefficient of the PVC conveyor belt is measured by the degree of elasticity reduction or hardness increase before and after freezing, and the quality of rubber cold resistance is measured; the test instruments include tensile cold resistance coefficient tester, compression cold resistance coefficient tester, etc .; 2. The brittleness temperature test understands the low-temperature resistance of the material through the temperature of the specimen when it is impact-ruptured at low temperature; 3. The torsional modulus is determined by measuring the torsional angle of the rubber sample at different temperatures, and calculating the change in torsional modulus to measure the degree of increase in the rigidity of the rubber at low temperatures; 4. The glass transition temperature test determines the temperature when the rubber changes from a highly elastic state to a glass state, that is, the glass transition temperature, which can characterize the limit of the use temperature of the rubber material. The instruments used are temperature deformation curve tester, differential thermal analyzer, dilatometer Measuring instrument, dynamic modulus instrument, etc .; 5. Determination of the crystallization tendency Through the temperature-shrinkage test method, important low-temperature performance data such as the viscoelastic performance of the conveyor belt rubber at low temperature and the degree of crystallization at low temperature can be measured