PolyDADMAC DADMAC

Polycyclopentene, 16 112 PolyDADMAC, 20 472. See also Polydiallyldimethylammonium chloride (DADMAC)... 

Scheme 4.7 Synthesis of PolyDADMAC by free radical polymerization of DADMAC [194]...

DADMAC 13C, for example, can be readily polymerized imder these cyclopolymerization conditions to yield PolyDADMAC in which a structure composed of 5-membered A -heterocycles predominates. 13C will readily polymerize at 35°C employing ammonium persulfate as the initiator. 13C is readily copolymerized with other diallyl monomers, with acrylamide monomers such as 28C or diacetone acrylamide, or quaternized 1C. Extensive reviews of cyclopol5mieriza-tion and cyclocopolymerization can be found in Reference 188. Recent examples of cyclocopolymerization with sulfobetaine (14C) and carboxybetaine (15C) diallyl ammonium monomers are given in References (188-191). 

PolyDADMAC polymers are used for potable water clarification, waste water treatment, and textile processing. They are commercially available as solutions with solids as high as 70% and molecnlar weights ranging from 10,000 to 500,000 Da. These polymers are synthesized by the free radical solntion polymerization of DADMAC monomer, obtained from the reaction of allyl chloride, dimethylamine, and sodium hydroxide in an aqueous solution. The structure of polyDADMAC consists of abont 98% five-member pyrrodinium rings from an internal radical cycloaddition reaction and 2% pendant double bonds from the radical addition across one of the allylic double bonds (Fig. 19.3) [6]. 

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