Sulfur dioxide-co-alkenes

A free radical polymerization reaction in the presence of a peroxide or hydroperoxide can take place between an olefin and SO2. The resulting poly(olefin sulfone) may have a variable composition (variable content of SO2), but poIy(ethylene-a/f-sulfur dioxide), CAS 110711-58-5, or poly(ethylene sulfone) can be obtained. Different olefins can be used in the reaction, as well as butadiene. Poly(sulfur dioxide-co-alkenes) may have a variable composition from 1.1 mole ratio (a/t copolymer) to various other monomer ratios. 

Table 12.2.1. Summary regarding literature studies on thermal decomposition of several poly(sulfur dioxide-co-alkenes) [2],...

Poly(ether sulfones) containing aromatic rings in the backbone have much better thermal stability compared to poly(sulfur dioxide-co-alkenes). For example, PSF degrades very slowly in vacuum above 400° C, and only above 460° a more rapid decomposition begins [4], Other poly(ether sulfones) behave similarly [5]. Several reports on the thermal decomposition for poly(ether sulfones) are available in literature. A summary of such reports are given in Table 12.2.3. 

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