Telechelic polyolefin

Another approach involves the use of difunctional telechelic polyolefins with ester, hydroxyl, and amine terminal groups. Telechelic polyolefins can be used to make polyesters, polyamides, and polyurethanes with low permeability to solvents and gases. 

SYNTHETIC METHODS SILICON-CONTAINING POLYMERS, FUNCTIONALIZED POLYOLEFINS, AND TELECHELICS... 

Although the telechelic functional polymers are very attractive from a fundamental point of view, their synthesis is often impossible. Much more commonly, the active groups are incorporated in the chain either by a free-radical copolymerization with a small amount of functionalized comonomer or by functionalization of the chain after polymerization in the presence of free radicals (typical of the functionalization of the polyolefins). Either method generally produces several reactive sites per chain. 

The use of liquid chromatography at the critical point of adsorption (CC, critical chromatography) for the determination of the functionality type distribution of telechelics was demonstrated by Evreinov and co-workers [2,11-15]. Meanwhile, a significant number of investigations on functional polyolefines, oligoethers, polyesters, and epoxy resins were conducted showing the usefulness of this new technique. 

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