This material is capable of further polymerization by reactive groups to a fully cured, high-molecular-mass state.
As such, mixtures of reactive polymers with un-reacted monomers may also be referred to as pre-polymers.
[1] In polyurethane chemistry, prepolymers and oligomers are frequently produced and then further formulated into CASE applications - Coatings, Adhesives, Sealants, and Elastomers.
When polyurethane dispersions are synthesized, a prepolymer is first produced usually modified with DMPA.
A variety of catalysts can polymerise lactide to either heterotactic or syndiotactic polylactide, which as biodegradable polyesters with valuable (inter alia) medical properties are currently attracting much attention.