Poly-amine adduct

Properties Short-chain aliphatic poly amine Oxyalkylated short-chain poly amine Long-chain polyamine adduct Aromatic poly amine adduct Polyamide... 

Higher molecular weight epoxy resin hardeners such as fatty polyamides do not have the problems associated with amines and amine adducts. These reaction products of dimer and trlmer acids with polyfunctional amines provide films with fewer surface discontinuities. Polyamide cured epoxy coatings are more forgiving than amine cured epoxy coatings since they require less demanding surface preparation. Also, mix ratios are less critical for poly-amide/epoxy coatings (56). 

Macro-diisocyanates based on the reaction of an excess of 2,4-toluene diisocyanate with different poly(dimethylsiloxane)diols of different lengths have been prepared by Nikolaev et al. [71]. These macro-diisocyanates were reacted with 2 in stoichiometric proportions and the resulting adduct (22) was cured with a commercial epoxy resin in the presence of what was termed poly(ethylene)-poly(amine) at room temp-cerature, 80, and 100°C. The mechanical and thermal properties of steel-to-steel assemblies joined by these adhesives were better than those obtained using more common binders. 

As Fig. 15b illustrates, the graphical relation appears to be linear for an interaction number of 3 to 4, if A 1. Alternatively, for A = 1, linearity is evident (Fig. 15c) when the interaction number is 5 to 6. Thus a large value of A is compatible with the smallest interaction number. Excimer formation occurs within the fluorescence lifetime, about 8 nsec. Within that time the pyrene-labeled amine side chains must approach within about 4 A of each other. For the 5.3% pyrenylpolyethylenimine derivative in ethanol, where no ground-state association occurs, the effective local concentration of pyrene on the polymer matrix is about 10-2 M, as calculated from excimer fluorescence. In aqueous solution, where clusters form within the polymer matrix, the effective local concentration of pyrene adduct must be even greater. The quantitative assessment of fluorescence intensities (Fig. 15) points to a minimum interaction number of 3 to 4 pyrenyl-labeled amine side chains, within the 8 nsec lifetime. Since A 1, it appears from (12) that kDM(A) kMD + kD. Thus excimer formation must be very rapid in the polymer environment. We can conclude, therefore, that the primary-amine side chains of poly-ethylenimine are very flexible and mobile. 

Derivatized polyethers such as polyether sulfate have been investigated for both positive- and negative-ion calibration [11]. Although poly ether sulfates are not commercially available, they are easily synthesized. Lauryl sulfate ethoxy-lates were also used as calibrants for negative-ion ESI. Polyether amines and quaternary ammonium salts were used as positive-ion calibration solutions [11]. These commercially available compounds do not exhibit significant sodium or potassium adducts, and they are more easily flushed out of the mass spectrometer ion source than are nonderivatized polyethers. In addition, doubly charged poly ether diamines can produce reference peaks at low m/z values. 

Lewis base adducts of U(OCFl2CH3)5 have been prepared with acetonitrile, THF, pyridine, and SO2, " and adducts of U(OCFl2CF3)5 were prepared with a number of aliphatic amines (NMes, NPrFl2, NPr Fl2, NPr2Fl, NMc2H, ethylenimine). Later reports of the synthesis of poly-fluoroalkoxides ethanol adducts U[OC(CF3)3]4(OCF[2CF[3)(F[OCF[2CF[3), and U[OCH-(CF3)2]4(OCF[2CF[3XEIOCF[2CF[3) from the reaction between the respective fluorinated alcohol with U(0CF[2CF[3) " determined these complexes to be monomeric. 

For the synthetic fibre poly(ethylene terephthalate) it is very important to impart antistatic properties to it [175]. Studies on the effect of the structure of cationic surfactants on the half-life time of static charge decay and surface resistivity (Rs) of PET fibres show best results with a methylated quarternary ammonium salt of a stearyl amine-ethylene oxide adduct or hydrochloride of a lauryl amine-EO adduct with 10 EO. 

IR spectroscopy is well suited to monitor the progress of post-functionalization reactions—for example, for the quaternization of P4VP (see Figure 4.IB) or the hydrolysis or reduction of poly(vinylfor-mamide) to yield primary amines (see Figure 4.1C) [1,2]. Moreover, the presence of undesired by-products such as boric acid after using borane/THF adducts for the aforementioned reduction reaction can be detected. 

Oxygen adducts are readily formed by the air bubbling of a solution of cobalt amine complex. Similar p-peroxo cobalt(III) complexes are formed by the reaction of oxygen with a variety of cobalt(II) chelates. The amine ligands in oxygen-binding complexes also have been extended to polyamines, such as poly(ethyleneimine) (details are given in Experiment 9-4, Section 9.5). 

Wang and co-workers synthesized hyperbranched poly(amido amine) (PAMAM)-grafted MWCNTs via a step-by-step divergent methodology from amino-functionalized CNTs. The resulting adduct was well dispersible in polar solvents. Further modification of grafted PAMAM with fluorescein... 

Phosphoranimine condensation was discussed in recent reviews and mechanistic studies. A step-wise progression is shown in Scheme 12. Poly (propyleneglycol) (PPG), terminated with amine groups, reacts with bis-tiifluormethylbromo-N-trimethylsilylphosphoranimine to form the PPG-phosphazene adduct. Oligomeric poly(dichlorophosphazene) is formed from the ambient temperature condensation of tris-trifluoroethoxy-N-trimethyl-... 

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