The relationship between the number-average degree of polymerization and polymerization mechanism is the key content of polymerization reaction engineering analysis

and is also one of the difficulties of the course “

Fundamentals of Polymerization Reaction Engineering

”. The understanding of the effect of operation and polymerization mechanism on the number-average degree of polymerization will help students to master the polymerization mechanism

process

product characteristics

and the analysis of similar engineering problems. Here

the relationship between the number-average degree of polymerization and the conversion is analyzed in light of the lack of a detailed derivation process. The effect of chain transfer reactions on the relationship between the number-average degree of polymerization and the conversion is mainly discussed in two cases of short and long active chain life

and a detailed derivation process is given to provide a reference for teaching and help students to deepen their understanding and grasp. The aim is to provide a reference for teaching

to help students to deepen their understanding

and to enhance their learning interests.