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,H ,H

j-CH2-f-£-j-CH2-f-CH2-ln-X aliphatic ether, chlorine or

Compounds with two allyl substituents can form polymers containing' piperidine ring structures [Eq. (12)]:

R R

+

(12)

Such chemistry of poly(diallylammonium salts) is discussed in detail by Butler [71] in a review which also outlines many uses found for cationic polymers. Similar chemistry is illustrated in Eq. (10).