Degree of Substitution Definition:

For alkenes, a classification method that refers to the number of alkyl groups connected to the double bond.

Degree of Substitution Explained:

The degree of substitution (DS) of a polymer is the average number of substituent groups attached per base unit (in most cases of condensation of polymers) or per monomeric unit (in the case of addition polymers). The term has been mainly used in cellulose chemistry.