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Polymer versus polymerization

Short answer

A polymer is a macromolecule consisting of many repeating units, while polymerization is the chemical process of joining monomers to form that polymer. Polymer is the end product (e.g. polyethylene); polymerization is the reaction (e.g. addition polymerization).

Differentiate between polymer and polymerization.

PointPolymerPolymerization
MeaningA large molecule (macromolecule) formed from many repeating unitsThe chemical process of joining monomers to form a polymer
NatureA substance (product)A reaction (process)
RoleFinal material, e.g. polyethylene, PVCMethod used to make it
TypesNatural (rubber, cellulose), synthetic (plastics), thermoplastic, thermosettingAddition and condensation polymerization
ExamplePolyethylenen CH2=CH2→(−CH2−CH2−)nn\,CH_2{=}CH_2 \rightarrow (-CH_2{-}CH_2-)_n
Key featureVery high molecular mass (thousands or more)Needs heat, pressure, a catalyst or an initiator

In short, the polymer is what is formed and polymerization is how it is formed.

✓ Answer checked by Claude Opus 5.5 (high effort)

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