Direct polyethersulfone

Manea, C. and Mulder, M. 2002. Characterization of polymer blends of poly-ethersulfone/sulfonated polysulfone and polyethersulfone/sulfonated poly-etheretherketone for direct methanol fuel cell applications. Journal of Membrane Science 206 443-453. 

Several different approaches to the construction of poly(arylene-carborane)s were initially considered (Scheme 1). These included (i) nucleophilic polycondensation between a bis-phenol and an activated, carborane-based dihalide in the presence of base, a reaction used for the synthesis of commercial polyetherketones and polyethersulfones,4 (ii) electrophilic polycondensation between an aromatic diacid and a carborane-based diarylether in the presence of a strong-acid catalyst,5 and (iii) direct, homogeneously-catalysed coupling of a carborane-based dihalide.6 However,... 

The resulting poly(oxy-1,4-phenylene sulfonyl-1,4-phenylene) (PES), CAS 25667-42-9, is a valuable polymer used to make various household appliances, medical devices, automotive parts, etc. The polymer can be shaped by thermoforming and is used in various composite materials. It has good fire safety characteristics and meets the requirements for direct food contact. Other polyethersulfones with structures similar to PES also have important practical applications and are used for the manufacturing of different appliances, cookware, automotive and aerospace components, etc. 

Processes developed for the injection molding of circuit boards include PCK Technology s mold-n-plate process uses two shots, the first being one of catalytic resins, to form paths on plastic parts that are then processed in a copper bath to form circuitry. Special grades of polysulfone, polyethersulfone, and polyarylsulfone are used for the process. In the in-mold metallization process, various conductive, resistive, capacitive, or inductive components are embedded directly into the plastic part in the tool. 

Li L, Wang Y (2005) Quatemized polyethersulfone Cardo anion exchange membranes for direct methanol alkaline fuel cells. J Membr Sci 262 1-4... 

Gil SC, Kim JC, Ahn D, Jang JS, Kim H, Jung JC, Lim S, Jung DH, Lee W (2012) Thermally crosslinked sulfonated polyethersulfone proton exchange membranes for direct methanol fuel cells. J Membr Sci 417-418 2-9... 

Preparation of composites from polyetherimide (PEI) and polyethersulfone showed that the ILSS values are controlled by the work of adhesion as measured by the contact angle. Results by XPS of polymer monolayers gives strong evidence for chemical bond formation in the polymer-carbon interface, but bonds are formed at processing temperatures above 300°C, when —COOH groups are deeomposed, whereas the —C=0 groups are directly involved with bonding epoxies. 

Li, L and Wang, Y. (2005) Sulfonated polyethersulfone Cardo membranes for direct methanol fuel cell. Journal of Membrane Science, 246 (2), 167-172. 

C. Manea, M. Mulder, Characterization of polymer hlends of polyethersulfone/ sulfonated polysulfone and polyethersulfone/sulfonated polyetheretherketone for direct methanol fuel cell apphcations, J. Membr. Sci., 206 (2002) 443-453. 

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