Examples of Acrylate Prepolymers Used for Radiation Technology

Examples of Acrylate Prepolymers Used for Radiation Technology 

Ethoxylated and propoxylated acrylates are highly reactive, yet exhibit less skin irritation.  

Radiation-induced grafting in its simplest form involves heferogeneous sysfems, with the substrate being film, fiber, or even powder and fhe monomer fo be graffed onto fhe subsfrafe a neaf liquid, vapor, or solufion. 4i Currently, three main radiation grafting techniques are known  

In the pre-radiation procedure, the substrate is first irradiated, usually in vacuo or inert gas, to produce relatively stable free radicals, which are fhen reacted with a monomer, usually at elevated temperatures. A major advantage is minimization of homopolymer formation.  

The peroxidation procedure, which is the least often used of all the irradiation techniques, involves irradiation of the substrate in the presence of air or oxygen. This produces diperoxides and hydroperoxides on the surface of fhe subsfrafe, which are stable, and the substrate can be stored until the combination with a monomer is possible. Monomer, with or without solvent, is then reacted with the activated peroxy trunk polymer in air or under vacuum at elevated temperatures to form the graft copolymer. The advantage of this method is the relatively long shelf life of fhe infermediate peroxy trunk polymers before the final grafting step.  

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