Electrical Properties of Polymers contains many abstract basic concepts and much mathematical and physical knowledge

and thus it is not easy to master the core content for many undergraduate students. Some students don't know which parameters should be used to characterize the electrical properties of polymers and also don' t know which parameters should be used to select a polymer for a specific application. According to the experience of the authors

the teaching effect can be improved using four parameters (i. e.

dielectric constant

dielectric loss tangent

breakdown strength and electrical conductivity) as the core teaching content. In this article

the authors give their teaching experience on the contents which are difficult to teach and/or learn

and emphasis is given to the physical meaning and the origin of the dielectric loss. These may be referred by other teachers.