What is the difference between PE plastic and PVC plastic?

Polyethylene (PE) can be considered to be transparent in the film state, but strong light scattering opaque occurs in the presence of a large amount of crystals in the presence of a block. The degree of crystallization of polyethylene is affected by the number of branches, and the more branches, the more difficult it is to crystallize. The crystal melting temperature of polyethylene is also affected by the number of branches, distributed in the range from 90 degrees Celsius to 130 degrees Celsius, and the more the branches, the lower the melting temperature. Polyethylene single crystals can usually be prepared by dissolving high density polyethylene in xylene in an environment above 130 degrees Celsius.
Structural formula: - CH2 - CH2 - CH2 - CH2 - CH2 - CH2 - CH2 - CH2

Polyvinyl chloride (PVC) is a polymer material that uses a chlorine atom to replace one of the hydrogen atoms in the polyethylene.
The most important feature of PVC is its flame retardant, so it is widely used in fire protection applications. However, polyvinyl chloride releases hydrochloric acid and other toxic gases during the combustion process.
Structural formula: - CH2 - CHCl - CH2 - CHCl - CH2 - CHCl