Role of Imidization in Thermal Hydrolysis of Polyacrylamides
Polyacrylamides (PAm), including copolymers having acrylamide as the major component, have been a popular model system in many recent studies of water-soluble polymersl1–13. In the literature there is general agreement that longer heating of dilute aqueous PAm solutions at higher temperatures favors the formation of carboxylates. Intermolecular imidization resulting from heating solid PAm also is widely reported1,3,6,7,13. However evidence varies as to whether intramolecular imidization occurs to any detectable extent in aqueous PAm solutions1,3,4,13,14. Only Sawant and Morawetz report imidization as a reaction pathway in alkaline hydrolysis of PAm4. Guerrero, et a1.10,13, on the other hand, report seeing no intramolecular imide structure using a variety of characterization techniques. Generally speaking, the opinions have been widely divided in the literature on this particular issue.
KeywordsCarbon Capture Thermal Aging Methine Carbon Thermal Hydrolysis Phillips Petroleum
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