Poly (phosphatidylcholine) analogs

Synthesis and Characterizations of Copolymers Containing Both Phosphatidylcholine Analogues and Poly(Ethylene Glycol) in the Side Chains

“…A similar observation was reported for a polymerizable zwitterionic betaine surfactant in acidic conditions [30]. Moreover, in our early work the qsp/C of some analogous phospholipid homopolymers containing the phosphatidylcholine moiety or analogue in the side chains [ 151 or in the main chain [29] was found to increase monotonously with a dilution of concentrations. The reversed variations of r],/C for these present copolymers may come from the weak electric charge density in the side chains.…”

A regular, hydrophobically modified polyampholyte as novel pour point depressant

“…Therefore, more convenient approaches have been developed, in particular, the free-radical copolymerization of zwitterionic and hydrophobic monomers. [13][14][15][16][17][18][19] For instance, acrylamide-based hydrophobically modified polysulfo-and carbobetaines containing N-butylphenylacrylamide and varying amounts of 3-(2-acrylamido-2-methylpropanedimethylammonio)-1-propanesulfonate (AMPDAPS) or 4-(2-acrylamido-2-methylpropyldimethylammonio)butanoate (AMPDAB), respectively, were synthesized by micellar copolymerization. 20 The amount of AMPDAPS or AMPDAB in the terpolymers varied from low (5 mol %) to high (25 mol %).…”

Preparation, characterization and application of zwitterionic polymers and membranes: current developments and perspective

“…At present, ionic groups on the molecular backbone of zwitterionic organic polymers can be created via various techniques: (1) polymerization of haloalkylsulfonates with tertiary amine groups in the polymer chains;51 (2) ring‐opening reaction of a lactone reagent with tertiary amine groups, such as 1,3‐propanesultone, 1,4‐butanesultone or 1,4‐butyrolactone;9, 10, 52 and (3) ring opening of dicyanoketene ethylene acetal by tertiary amino monomers 53. These ionic groups may be positioned on different monomer units, the same monomer unit or some macromolecular polymers, such as polyphosphobetaines,13 polyesters16 and poly(ether urethane)s 58. Hence, zwitterionic organic polymers containing various strong or weak acidic groups can be constructed.…”

“…Accordingly, it is of significance to develop better synthetic techniques and improve their performances. Various approaches have been adopted for such purposes 9–18. Among them, the inorganic/organic hybrid technique is regarded as one of the most effective methods to improve the mechanical strength and thermal stability of polymers and membranes 19–29.…”