Bond scission radiation induced, poly

Table I. Possible Radiation Induced Bond Scissions in Poly (Isobutene Sulfone) and Expected Number of Lines in the ESR Spectra of the Corresponding Radicals...

Subsequent reactions are strongly dependent on the chemical nature of the polymer. Recombination of radicals to form a new chemical bond is often observed and is the key process in radiation-induced cross-linking. Examples of polymers in which cross-linking is favored include polyolefins such as polyethylene (PE), natural rubber, or poly-dimethylsiloxane (PDMS). In other polymers, including most fluori-nated polymers, poly(methyl methacrylate) (PMMA), and natural polymers such as DNA and cellulose, chain scission is favored, leading to degradation of the polymer (for a more comprehensive list, see Drobny [2, p. 21]). 

The extremely high sensitivity of polysulfones to radiation-induced main-chain scission has found application in the field of microelectronics 829337 769786 705682. The reaction of sulfur dioxide with an olefin or double-bond-containing species leads to a poly(olefin sulfone),... 

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