Bisphenol-A polysulfone

Scheme 6.11 Typical nucleophilic synthesis of bisphenol A polysulfone.

Quentin may have been the first to sulfonate (arylene ether sulfone).168 In this patent, it was demonstrated that the bisphenol A polysulfone could be sulfonated by chlorosulfonic acid to produce a sulfonated polyfarylene ether sulfone), which was used for desalination via reverse osmosis. However, the chlorosulfonic acid may be capable of cleaving the bisphenol A polysulfone partially at the iso-propylidene link or it might induce branching and crosslinking reactions by... 

Bisphenol-A benzoxazine reaction, under acidic conditions, 416-417 Bisphenol-A polyarylates, 77 synthesis of, 109-113 Bisphenol-A polysulfone, 327 nucleophilic synthesis of, 337 Bisphenolic monomer, 354 Biurets, 227... 

Nucleophilic displacement, PQ and PPQ synthesis by, 310-311 Nucleophilic substitution, 10, 282, 283 hyperbranched polyimides via, 308 Nucleophilic synthesis, of bisphenol-A polysulfone, 337... 

SPSF-Na represents Bisphenol A-polysulfone which has been su3.fonated and... 

Polymer Preparation and Characterization. Bisphenol A-polysulfones of different molecular weight and sulfonated to various degrees have been prepared. In addition, the commercial Bis A-PSF has been sulfonated to various D.S. values and neutralized with sodium or potassium counter-ions. The... 

Polymers XL-XLIII are commercially available. XL and XLI are referred to as poly-etheretherketone (PEEK) and polyetherketone (PEK), respectively. XLII and XLIII are known as bisphenol A polysulfone and poly ethersulf one, respectively. Polymers XLI and XLIII can be synthesized not only using the combination of A—A and B—B reactants, but also by the self-polymerization of appropriate A—B reactants. 

Another (family of linear aromatic polymers is the polysulfones. They are tough, high-temperature-resistant engineering thermoplastics. Polysulfones may be synthesized by the nucleophihc substitution of alkali salts of biphenates with activated aromatic dihalides. A typical example is the preparation of bisphenol A polysulfone (21) from the reaction of disodium salt of bisphenol A with dichlorodiphenyl sulfone ... 

Assistant Professor of Physical Chemistry, Helwan University, Cairo, Egypt Bisphenol-A polysulfone Polycarbonate Poly(ether sulfone)... 

Sulfonated bisphenol A polysulfone-l)/ocfc-poly(vinylidene fluoride)... 

Extensive studies of the dynamic-mechanical properties of a number of different polysulfones has been reported by Robeson et al. [77] and by Aitken et al. [78] Most of studies reported in the literature have focused on the two commercially important polysulfones — bisphenol-A polysulfone (PSF)... 

TABLE 13.6. Glass-transition and secondary-relaxation temperatures of bIsphenol-A polysulfone and polyethersulfone. 

Random block copolymers of glassy bisphenol-A polysulfone and semi-crystalline hydroquinone polysulfone were prepared by Viswanathan et al. These glass-crystalline segmented copol3nners were found to have improved ESCR especially when the hydroquinon content was increased. In addition, block copolymers of bisphenol-A polysulfone and a polyarylester derived from bisphenol-A and mixtures of terephthaloyl and isophthaloyl chlorides were prepared. The generalized synthetic scheme employed is shown in Equation 1. 

Bosnyak, et (3) have prepared copolymers of poly(bisphenol-A-terephthalate) and bisphenol-A-poly-carbonate. These randomly coupled block or segmented copolymers are shown schematically in Equation 1. These materials deformed uniformly in tension, in contrast to homo-bisphenol-A polycarbonate where necking is observed (3). Block copolymers of bisphenol-A polycarbonates and bisphenol-A polysulfone have been investigated by McGrath, et al. (4,5,12). 

McGrath, Robeson, and Matzner investigated block copolymers and homopolymer-copolymer blends of bisphenol-A polysulfone and nylon-6 (7). They found improved ESCR as the content of the crystalline nylon-6 block increased. Similarly, Viswanathan, al. prepared random block copolymers of bisphenol-A pFTysulfone and the partially crystalline hydroquinone polysulfone (8). ESCR improved markedly as the hydroquinone content increased. However, while the copolymers "as made" are semicrystalline, the compression molded specimens used for ESCR studies are amorphous. Hence, recrystallization from the melt was quite slow. The improvement of ESCR is attributed to solvent-induced crystallization of the surface layers, which was presumed to restrict diffusion of the liquid into the bulk. 

The present work involves the synthesis of block copolymers of bisphenol A polysulfone ( and a polyaryl ester ( ). The polyaryl ester ( ) was chosen because it offer s a range of possible mo rphologies, depending on the structure of the acid chloride used in this synthesis. Conix (9) has prepared a wide range of polyesters of this type by using varying ratios of... 

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