Synthese, Charakterisierung und Symplexbildung von Polyampholyten aus ungesättigten Dicarbonsäure‐ und Allylaminderivaten. 2. Mitt.: Spektroskopische Untersuchungen an Polymeren aus Maleinsäure und Allylaminderivaten

Abstract

331Besides the surface activity of the amino resins used, the electrostatic interactions between the protonated amino resin and the negatively charged organic phase can be considered as driving force. Thereby the reaction rate of the polycondensation in the boundary phase is increased contrary to the volume phase with the result of capsule wall formation.These conceptions are supported by the fact t h a t in the presence of other non-reactive tensides no microcapsules will be formed. These tensides occupy the phase boundaries and prevent the enrichment of polycondensation active b u t less surface active amino resins.A detailled discussion of the mechanism of capsule formation will be given in connection with the discussion of surface activity of amino resins [Is]. The preparation of microcapsules is also possible with unmodified, nonetherified $IF-resins. In this case the suitable reaction conditions have to be evaluated by preliminary tests. Under t h e applied reaction conditions, pure urea-formaldehyde resins were not capable of wall formation.Results of biological testing of MP-microcapsules will be published elsewhere [ 2 4 ] .

Synthesis and aqueous solution properties of sterically stabilized pH-responsive polyampholyte microgels

“…Numerous studies on random polyampholytes have been reported by various groups, for example those of Candau [2][3][4][5][6][7] and McCormick [8][9][10][11]. Hahn et al prepared several alternating polyampholytes [12][13][14][15][16] and characterized their aqueous solution properties, while the synthesis and characterization of diblock polyampholytes was not accomplished until 1970s [17][18][19]. Such a synthesis requires sequential monomer addition under living polymerization conditions, usually with protected monomers.…”

New Regular, Amphiphilic Poly(ampholyte)s: Synthesis and Characterization

“…[5] Noteworthy, cyclocopolymerization of allylamine, diallylamine and Nmethyldiallylamine with maleic acid was occasionally reported to yield regular poly(ampholyte)s systems in the form of alternating copolymers. [6][7][8][9][10] This is an attractive approach to well-defined poly(ampholyte)s which generally must be prepared by the polymerization of specially designed monomers, [11][12][13][14] or by multistep synthesis via reactive precursor polymers. [15][16][17] Within other interesting potential uses, poly(ampholyte)s may serve as models or mimics of proteins, especially when bearing hydrophobic fragments that render them amphiphilic.…”

Synthesis and Characterization of Novel pH‐Responsive Polyampholyte Microgels

“…There is considerable literature on the synthesis and aqueous solution properties of random linear zwitterionic copolymers. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] The synthesis and characterization of diblock polyampholytes were not accomplished until the 1970s. [20][21][22] Such synthesis requires sequential monomer addition under living polymerization conditions, usually with protected monomers.…”