1. 1. 2. 3. 4. 5. 6. 7. © Synthesis And Solution Properties Of A New PH-Responsive Polymer Containing Amino Propanesulfonic Acid Residues Ali, SA; Mazumder, MAJ; Al-Muallem, HA JOHN WILEY SONS INC, JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY; pp: 172-184; Vol: 41 King Fahd University of Petroleum & Minerals http://www.kfupm.edu.sa Summary The reaction of diallyl amine with 1,3-propane sultone led to the synthesis of the zwitterionic monomer 3-(N,N-diallylammonio)propanesulfonate. The sulfobetaine was cyclopolymerized in water in the presence of sodium chloride with t- butylhydroperoxide as an initiator to afford a polysulfobetaine (PSB) in very good yield. PSB, upon treatment with sodium hydroxide, was converted into an anionic polyelectrolyte (APE). Although APE was readily soluble in salt-free water, PSB needed the presence of low-molecular-weight salts (e.g., NaCl, KI, etc., in the range of 0.135-1.04 N) for its dissolution. The solution properties of PSB and APE were investigated with potentiometric and viscometric techniques. The basicity constant of the amine was apparent and followed the modified Henderson-Hasselbalch equation; as the degree of protonation (alpha) of the whole macromolecule increases, the protonation of the amine nitrogens becomes increasingly more difficult. The composition and phase diagram of the aqueous two-phase systems of APE/PSB and poly(ethylene glycol) were also explored. (C) 2002 Wiley Periodicals, Inc. References: *STANF RES I, 1993, CHEM EC HDB, P581 ALBERTSSON P, 1986, PARTITION CELL PARTI, P35 ALI MM, 2000, POLYMER, V41, P5591 ALI SA, 1997, POLYMER, V38, P3385 ALI SA, 1999, POLYMER, V40, P2439 ALI SA, 1999, POLYMER, V40, P6849 ALI SA, 2001, POLYMER, V42, P7961 Copyright: King Fahd University of Petroleum & Minerals; http://www.kfupm.edu.sa

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3. 54. © WOLYNES PG, 1995, SCIENCE, V267, P1619 For pre-prints please write to: abstracts@kfupm.edu.sa Copyright: King Fahd University of Petroleum & Minerals; http://www.kfupm.edu.sa