chain extender

This polymer has high molar masses without the use of a chain extender.

The choice of chain extender also determines flexural, heat, and chemical resistance properties.

Baulé says that using multi-component machines processors can cover a wide hardness range with only one quasi-prepolymer and three chain extenders.

Polyurethanes are typically synthesized using a diisocyanate, a diol, and a polymer chain extender.

Formaldehyde added to acetylene reacts producing 1,4-butynediol which can be hydrogenated to 1,4-butanediol used as a chain extender for polyurethane.

The resin blend may be made up of amine-terminated polymer resins, and/or amine-terminated chain extenders.

The chain extender "zips-up" the prepolymer molecules, increasing molecular weight and creating the final PU polymer.

Resin blend additives may include chain extenders, cross linkers, surfactants, flame retardants, blowing agents, pigments, and fillers.

In polyurethanes, it is used as a chain extender, and the resulting modified polyurethane has high resistance to hydrolysis as well as mechanical strength, but with a low glass transition temperature.

Elongation of the fatty acid follows the same biosynthetic pathway in Escherichia coli used to produce straight-chain fatty acids where malonyl-CoA is used as a chain extender.

Polyurethanes consist of long linear chains with flexible, soft segments (diisocyanate-coupled low-melting polyester or polyether chains) alternating with rigid segments (diurethane bridges resulting from diisocyanate reacting with a small-molecule glycol chain extender).

The soft segments, which are formed from high molecular weight polyols, are mobile and are normally present in coiled formation, while the hard segments, which are formed from the isocyanate and chain extenders, are stiff and immobile.