Polymer structure is an important material basis for its properties. A reasonable division of the structure of polymer materials is helpful to understand the relationship between structure and properties of polymer in polymer physics course. The classification of polymer structure should not only consider the spatial stacking characteristics of specific particles in static state

but also consider the basic units of structural movement or change of polymer. According to the particle size

the structure of polymers can be divided into single polymer structure (chain structure)

aggregated state of homopolymers (condensation structure) and aggregated state of multiple polymers (texture structure). Among them

the structural form determined by the chemical bond factor includes the relative molecular mass and equivalent isomers such as constitution and configuration. The structure levels determined by physical factors are the stacking and arrangement of local particles in space

and the chain segments are the most important moving (changing) units

although they are often ignored.