Investigation of temperature sensitivity behaviors of water soluble polyacrylamides

• Published in: Journal of applied polymer science Vol. 127; no. 6; pp. 4374 - 4384
• Main Authors: Uğuzdoğan, Erdal, Denkbaş, Emir Baki, Kabasakal, Osman Sermet
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 15.03.2013; Wiley; Wiley Subscription Services, Inc
• Subjects: Amines; Applied sciences; Chlorides; Cosmetics; critical flocculation temperature; Exact sciences and technology; Flocculating; Foods; lower critical solution temperature; Materials science; Monomers; Organic polymers; Physicochemistry of polymers; Polymers; Polymers with particular properties; Preparation, kinetics, thermodynamics, mechanism and catalysts; Reproduction; solution properties; stimuli-sensitive polymers; water-soluble polymers; Substituent effect; stimuli-sensitive polymers; lower critical solution temperature; Temperature effect; Experimental study; critical flocculation temperature; Acrylamide derivative polymer; Solution polymerization; Alcohol polymer; solution properties; Free radical polymerization; Preparation; Piperidine derivatives; Concentration effect; Property structure relationship; water-soluble polymers; Aqueous solution
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.38008

Temperature sensitive polymers with a lower critical solution temperature (LCST) are used in a variety of industries such as the pharmaceutical, cosmetic, food, and paint. These polymers are generally of the poly(N‐alkylacrylamide) type, of which poly(N‐isopropylacrylamide) (PNIPA) is the most commonly used. More novel poly(N‐alkylacrylamide)s have also been the subject of much attention recently. In this study, N‐alkylacrylamides containing different alkyl groups were synthesized by nucleophylic substitution reactions of various amines with acryloyl chloride. They were polymerized using the solution polymerization method, and the temperature sensitivities of the polymers were investigated. For this purpose, three monomers, N,N‐diethylacrylamide, N‐cyclopropylacrylamide, and 4‐piperidineethanolacrylamide, were synthesized using diethylamine, cyclopropylamine, and 4‐piperidineethanol, as the amines, respectively. The obtained polymers, poly(N,N‐diethylacrylamide) (PDEA), poly(N‐cyclopropylacrylamide) (PCPA), and poly(4‐piperidineethanolacrylamide) (PPEA), were found to be thermoresponsive, particularly PPEA is a potential novel material that can be utilized as an alternative to the common temperature sensitive polymers. The effects of several conditions on the LCST and the critical flocculation temperature (CFT) of the polymers were also investigated. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013