Bisphenol structure

Bisphenol Structure on the Direct Synthesis of Sulfonated Poly(arylene ether) Copolymers. 1. Journal ofPdymer Science Part A Polymer Chemistry 41 (2003) 2264-2276. 

The structure of PC, with its carbonate and bisphenolic structures, has many characteristics that promote its distinguished properties. The para-substitution on the phenyl rings results in a symmetry and lack of stereospeciflcity. The phenyl and methyl groups on the... 

Analysis of the monomer was done by C NMR. FT-IR and Mass Spectrometry (Tables 2, 3, 4) were also consistent with the 4,4 -bisphenol structure. 

Sample no. Bisphenol structure Polymer Yields (%) Classical PTC A B Under MW... 

The effect of bisphenol structure on kinetic parameters of their high temperature reaction with terephthaloyl chloride has been evaluated and discussed. " In this field a new preparative process involving the interaction of a pre-formed polyester, a diacid, and bisphenol diacetates in the melt-phase has been described. Kinetic and mechanistic studies have indicated the reaction to occur via the simultaneous cleavage of the pre-formed polyester by the diacid, condensation polymerization of carboxy and bisphenol acetate groups, and equilibration through polyester cleavage by carboxyl polymer ends. 

Due to its bisphenol structure, it is very sensitive in the presence of carbon black, being very advantageously used for the stabilization of reinforced TPO and crosslinked PE. 

Harrison, W., Wang, F., Mecham, J., Glass, T., Hickner, M., McGrath, J. (2001) Influence of bisphenol structure on the direct synthesis of sulfonated poly(arylene ether)s. In Abstracts of Papers of the American Chemical Society, Vol. 221, American Chemical Society, Washington, DC, p. U415. 

Ooi and Maruoka found that aluminum alkoxide (83) prepared from aluminum complex (82) and tertiary propargyl alcohol reacts with highly electrophilic aldehydes, such as chloral and pentafluorobenzaldehyde, to give alkynyl transfer products in good yield (Scheme 6.65) [84]. Bisphenol structure of ligands on aluminum center is the most important feature to obtain the alkynylated products, and thus, in reactions with (84) or (85) instead of (83) dramatical decrease in the yield of alkynyl product was observed. Same group also reported that cyanide transfer reaction with acetone cyanohydrin as a cyanide donor catalyzed by complex (82) [84]. 

Influence of the bisphenol structure on the direct synthesis of sulfonated poly(arylene ether) copolymers. J. Polym. Sci. Part A Polym. Chem. 41, 2264. 

Polycarbonate is a polyester in which dihydric (or polyhydric) phenols are joined through carbonate linkages. The general-purpose type of polycarbonate is based on 2,2-bis(4 -hydroxybenzene)propane (bisphenol A) and has the general structure ... 

Fig. 2. Molecular structures of selected photoconductive polymers with pendent groups (1) poly(A/-vinylcarba2ole) [25067-59-8] (PVK), (2) A/-polysiloxane carbazole, (3) bisphenol A polycarbonate [24936-68-3] (4) polystyrene [9003-53-6] (5) polyvin5i(l,2-/n7 j -bis(9H-carba2ol-9-yl)cyclobutane) [80218-52-6]...

Fig. 1. Structures of commercial epoxy resins (a) phenolic novolac epoxy resin, (b) glycidated polybasic acid, (c) glycidated polyamine (A,A,A, A -tetraglycidyl-4,4 -diaminodiphenylmethane [28768-32-3] (TGMDA)), and (d) glycidated bisphenol A.

These materials have the general structure shown in Figure 20.11 and are prepared by reaction of bisphenol A with iso- and/or terephthalic acid and a carbonate group donor (e.g. phosgene or diphenyl carbonate). 

Chemical Name 4,4 -(1,2-diethylidene-1,2-ethanediyl)bisphenol Common Name Dienoestrol Structural Formula ... 

Diphenol/thiophenol is one of the most important polymer precursors for synthesis of poly(aryl ethers) or poly-(aryl sulfides) in displacement polymerizations. Commonly used bisphenols are 4,4 -isopropylidene diphenol or bisphenol-A (BPA) due to their low price and easy availability. Other commercial bisphenols have also been reported [7,24,25]. Recently, synthesis of poly(aryl ethers) by the reaction of new bisphenol monomers with activated aromatic dihalides has been reported. The structures of the polymer precursors are described in Table 2. Poly(aryl ether phenylquinoxalines) have been synthesized by Connell et al. [26], by the reaction of bisphenols containing a preformed quinoxaline ring with... 

McNeill and Basan [151] studied the thermal degradation of blends of PVC with bisphenol-A polycarbonate. The structure of bisphenol-A polycarbonate is given in Eq. (42). 

Structure of bisphenol-A polycarbonate copolymerized with 3% by weight of labile groups... 

Tractable polymers can be prepared when amino and anhydride functions are not located on the same aromatic ring, and different strategies were employed to obtain soluble polymer. AB benzhydrol imide was prepared by polycondensation of 4-(3-amino-l-hydroxymethylene) phtlialic acid monomethyl ester in NMP. The polymer soluble in NMP has been used as adhesive and coating.56 A second approach was based on an ether imide structure. AB aminophenylether phthalic acids (Fig. 5.34) were prepared by a multistep synthesis from bisphenols.155 The products are stable as hydrochloride, and the polycondensation takes place by activation with triphenylphosphite. The polymers are soluble in an aprotic polar... 

The Ullman reaction has long been known as a method for the synthesis of aromatic ethers by the reaction of a phenol with an aromatic halide in the presence of a copper compound as a catalyst. It is a variation on the nucleophilic substitution reaction since a phenolic salt reacts with the halide. Nonactivated aromatic halides can be used in the synthesis of poly(arylene edier)s, dius providing a way of obtaining structures not available by the conventional nucleophilic route. The ease of halogen displacement was found to be the reverse of that observed for activated nucleophilic substitution reaction, that is, I > Br > Cl F. The polymerizations are conducted in benzophenone with a cuprous chloride-pyridine complex as a catalyst. Bromine compounds are the favored reactants.53,124 127 Poly(arylene ether)s have been prepared by Ullman coupling of bisphenols and... 

Robeson and Matzner were the first to report the synthesis of the sulfonation of DCDPS.205 This work makes it possible to synthesize sulfonated poly(arylene ether sulfone) with well-controlled structures. Ueda et al. used this monomer (Scheme 6.27) as a comonomer of DCDPS to react with bisphenol A and high-molecular-weight bisphenol-A-based copolymers with up to 30 mol % sulfonation achieved.206 Biphenol-based copolymers with up to 100 mol % sulfonation were recently reported by Wang et al.207... 

Figure 7.38 Epoxy structures (1) bisphenol-A-based epoxy, (2) brominated bisphenol-A-based epoxy, and (3) siloxane epoxy.

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