Carboxyl-terminated poly

Fig. 15 Carboxyl-terminated monolayer couples an enzyme via poly-L-lysine...

Poly(3inido amine) (PAMAM) Dendrimers. These dendrimers have a hydro-phihc polyamide interior that is relatively open to solvent, in contrast to a micellar assembly. Yet, the picture of a unimolecular micelle also emerged for a generation 4.5 PAMAM dendrimers having sodium carboxylate terminal groups (Fig. 11.4). 

Figure 11.4 Generation 4.5 poly(amido amine) dendrimer having sodium carboxylate terminal groups.

With regard to the carbonation of polymeric anions with counter ions other than lithium, Pannell325) has reported that poly(styryl)potassium reacts with carbon dioxide in tetrahydrofuran to form carboxyl-terminated polymer without the complicating side reactions which generate higher molecular weight species. 

Furthermore, flexibilized compositions have been described. As flexibilizers, carboxyl terminated polybutadiene [89] or simply poly butadiene [79] were mentioned. 

NaPGA) and amine-terminated PAMAM dendrimers [102-105], The flexible NaPGAs are possible to interact not only with protonated primary amines in the periphery of a dendrimer but also with tertiary amines in its interior. Opposite combination of the complex, which is stimulated by the electrostatic interaction, was formed between cationic synthetic polyelectrolyte, poly(dial-lyldimethylammonium chloride), and anionic carboxyl-terminated PAMAM dendrimers [106-109],... 

Zhang, Y., et al. (2004), Hollow spheres from shell cross-linked, noncovalently connected micelles of carboxyl-terminated polybutadiene and poly(vinyl alcohol) in water, Macromolecules, 37,1537-1543. 

Scheme 5 Carboxyl-terminated polyimide and poly(amic acid) used in combination with P4VP to prepare bollow spheres [127]...

Polyacrylic acid (PAA)—P2VP mixed brushes were prepared by a similar synthetic procedure, by grafting of carboxyl-terminated poly(ferf-butyl acrylate) (PtBuA) and P2VP. Afterwards, PtBuA was hydrolyzed in the presence of p-toluene sulfonic acid. The same strategy was employed to graft mixed PEL brushes on polymer surfaces. In this case plasma treatment was used to functionalize surface of polymer substrates. We introduced amino groups on the surface of PA-6 and PTFE by treatment of the polymer samples with NH3 plasma. Then the carboxyl terminated homopolymers were grafted step by step from the melt to the solid substrate via amide bonds. 

Additives. Acrylonitrile-butadiene rubbers were provided by BFGood-rich (Brecksville, OH). The amino-terminated butadiene-acrylonitrile (ATBN) rubber was obtained by reacting carboxyl-terminated butadiene-acrylonitrile (CTBN) with an excess diamine, Unilink 4200 (from UOP, El Dorado Hills, CA) consequently, free diamine molecules always remained in the rubber. The rubbers have almost the same molar mass but different end groups, which have been characterized in a previous work (20). Their structures are given in Chart I, and they are described in Table I. The two poly(ether sulfone)s (PESs) (Victrex, from ICI, United Kingdom) used in this study are described in Table II. 

From hexahydrophthalic anhydride, aminoethanol, neopentylglycol, isoph-thalic acid, and trimellitic anhydride a carboxyl terminated poly(ester-imide) resin is made and formulated with triglycidyl isocyanurate, pigments, and additives to give a powder coating with excellent heat resistance and no chalking after 5 month at 120 °C [236]. 

Excimer to Monomer Intensity Ratio. Our approach toward the determination of this information is to focus on the configurational behavior of the pyrene-terminated PEG. Two sets of experiments were performed to separate the intramolecular behavior of the isolated Py-PEG-Py chains from the intermolecular interactions that occur between labeled PEG chains. First, we performed photostationary fluorescence measurements of IJI for fully labeled PEG as a function of the molar ratio of the poly(carboxylic acid) to that of the PEG. These results will contain both intermolecular and intramolecular contributions to the excimer fluorescence. Next, we performed analogous measurements with the same total amount of PEG but with only 1% having pyrene labels. The selection of the relative amount of the tagged polymer is somewhat arbitrary, but it appears to be sufficiently low to provide a reasonable approximation to the behavior of the isolated, labeled PEG chain. These fluorescence results are then subtracted from those for the fully tagged system, leaving just the intermolecular contribution. 

The study of the toughening of DGEBA resin with a new RLP, Carboxyl Terminated n-Poly Butyl Acrylate (CTPnBA), is reported here. The CTPnBA rubber was synthesized by dilute solution polymerization and bulk polymerization techniques (20,21). The carboxyl functionality of the polymers varied from f = 1.3 (in solution polymerization) to f = 1.8-2.0 (in bulk polymerization). 

An exception to the definition for pseudo poly(amino acids) as previously established is a polymer synthesized by Chen et al. [31,32], because its backbone is comprised of lysine alternating with an isophthaloyl group and lacks nonamide linkages (Table 12.2). Hydrophobicity of the polymer is increased by conjugating ethanol or hydro-phobic amino acids, such as valine, leucine, and phenylalanine, as protecting groups on the carboxyl terminal of lysine via carbodiimide chemistry. This protected lysine is then copolymerized with isophthaloyl chloride via single-phase polymerization in the presence of a base (Table 12.2) [32]. 

Simonin F, Hofferer L, Panzeter PL et al. The carboxyl-terminal domain of human poly(ADP-ribose) polymerase. Overproduction in Escherichia coli, large scale purification and characterization. J Biol Chem 1993 278 13454-13461. 

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