Explanation
Instrument for measuring impact elasticity of rubber. vulcanized rubber sample will undergo deformation after being impacted by the pendulum, making the macromolecule chain from curly to straight chain. When the external force is removed, the molecular chain will recover due to the internal stress, that is, it will rebound. The size of rebound is expressed as a percentage of the rebound work after the pendulum impacts the sample and the work done when the pendulum falls. When the pendulum is in the horizontal position, it has potential energy Pn. When it falls, its potential energy gradually decreases, and its kinetic energy gradually increases. When it contacts the sample, all of its potential energy becomes kinetic energy, and the pendulum impacts the sample. Some of its kinetic energy is consumed inside rubber (molecular chain movement, heat generation, etc.
Classification
No classification at present.