Sulfone oligomers

Preparation of polyfethylene oxide) (PEO) and poly(arylene ether) based hydrophilic-hydrophobic block copolymer is of special interest because PEO has been proven to be particularly reliable and versatile for the surface modification of biomaterials. The first poly(ediylene oxide)-/ /oc/c-polysulfonc (PEO-fc-PSF) copolymers were reported by Aksenov et al.217 They employed diisocyanate chemistry to link hydroxy-terminated sulfone oligomers and polyfethylene... 

Eddy, L. T. R. Lucarelli, A. M. Helminiak, T. Jones, W. Picklesimer, L. F. An Evaluation of An Acetylene Terminated Sulfone Oligomer. Internal Report, A FWAL/MLBC, January 1983. 

Ethynyl-terminated sulfone oligomers (ETS) were prepared by end-capping hydroxy-terminated sulfone oligomers with 4-ethynyl benzoyl chloride as indicated in Eq. 8 (20). The... 

Arylether Sulfone Oligomers with Acetylene Termination from the Ullman Ether Reaction... 

The objectives of this work were to synthesize a series of arylether sulfone oligomers with an increased chain length between reactive sites by the proposed synthetic route. In addition, it was to be determined if the products obtained by this route would have initial glass transition temperatures near or below room temperature while having cured Tg s in the 300-350°F range of epoxides. 

Figure 1. Reaction sequence for AT arylether sulfone oligomers.

Jones, W. B., et. al., "Evaluation of an Acetylene Terminated Sulfone Oligomer," presented at American Chemical Society Meeting, March 1980, Houston, TX. 

A. Ayambem, S. J. Mecham, Y. Sun, T. E. Glass, and J. E. McGrath. End-group substituent effects on the rate/extent of network formation and adhesion for phenylethynyl-terminated poly(arylene ether sulfone) oligomers. Polymer, 41(13) 5109-5124, June 2000. 

Exactly the same method was successfully employed in the synthesis of 2,2 -bipyridines bearing a free amino group. Thus 4,4 -diamino-2,2 -bipyridine was prepared from 5-amino-2-chloropyridine in 60% yield, respectively [38]. Nickel-catalysed synthesis of biaryls and related vinyl halides were successfully used in a great number of examples [39,40], including the strained aromatic ether-sulfone oligomers [41]. For instance, compound 84 was cyclized to a very strained cyclic... 

Fig. 6.21 Stracture of the silica-core nanoparticles with grafted sulfonated oligomers (a) and physical crosslinking with Nation (b) (From Ref. [50] with permission)...

A highly porous polymeric foam can be prepared through emulsion templating by polymerizing the continuous phase of high internal phase emulsions [150], A maleimide-terminated aryl ether sulfone oligomer was copolymerized with divinylbenzene in the continuous phase, using a mixed surfactants system, cetyltrimethylammonium bromide, dodecylbenzene-sulfonic acid sodium salt, and a peroxide initiator. The polymers show a CO2 adsorption and improved mechanical properties. The materials exhibit an open cell and a secondary pore structure with surface areas of a 400 m g ... 

The monomers used in the preparation of the poly(arylene ether sulfone) oligomers were obtained and purified as follows ... 

In conclusion, the hydroxyl terminated poly(arylene ether sulfone) oligomers of controllable molecular weight were synthesized by the NMP/K CO route. These oligomers were isolated and reacted in a second step with terephthaloyl chloride with or without added biphenol to form segmented copolymers. This second reaction was performed either in solution or interfacial-ly. It was found that the interfacial process allowed a higher percentage... 

Figure 5.2 Separation of isotropic and anisotropic chemical shifts (a) MAS spectrum of an ether sulfone oligomer showing severe overlap of sidebands (b) 2D sideband MAS spectrum of the same compound showing resolved sidebands [18]...

Another triamine monomer (l,3,5-tris(4-aminophenoxy)benzene, TAPE) has been used as cross-linking agent by Yin et aL [114,115] (Fig. 25). Typically, anhydride-terminated sulfonated oligomers are prepared from BAPBDS and NTDA in m-cresol at 180 °C for 20 h. After adding some triamine monomer, in a second step, the reaction medium is kept at moderate temperature (50 °C), resulting in a polyamic acid intermediate. By a thermal treatment at high temperature or in the presence of an acetic an-hydride/pyridine mixture, complete imidization is performed during film formation. 

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