Bisphenols, polymers containing

The Tg and the Tm of polymers containing aromatic moieties such as phenylene and isopropylidene-bis-4-phenylene (derived from bisphenol A) are high when compared with those of analogous polymers derived from aliphatic-containing reactants. This is the result of both the rigidity of the aromatic portion and the contribution from electron delocalization. 

Table IV. Oxygen Permeabilities of Polymers Containing a Common Bisphenol...

Random Copolycarbonates Characterization and Comparative Properties of Polymers Containing Tetrachlorinated Bisphenols... 

The observed decrease in molecular weight was not due dominantly to degradation, as confirmed by IR and NMR spectra. For NMR it is noted that both polymers contain bisphenol units. The 4 and 4 carbons are thus sensitive to the extent of their reaction as shown in Figure 3. The original peaks regularly decreased in area and the two new peaks appeared and increased systematically in area. 

Hilborn et al. demonstrated the synthesis of PBOs (Figure 5.29) by polymerization of bis(fluorophenyl benzoxazoles) with bisphenols. This polymerization was based on the activation of the fluoro group toward nucleophilic aromatic substitution by the oxazole component of the benzoxazole heterocyclic [51]. The TgS of the poly(arylene ether benzoxazoles) ranged from 213 to 303 °C, depending on the bisphenol and activated dihalide used in the synthesis. Generally, the TgS increased with the bulkiness of the bisphenol used. The polymers containing the >C(CF3)2 unit in both the benzoxazole and the bisphenol moiety in the monomers showed higher solubility (NMP) compared to the other PBOs. The physical properties of fluorinated poly(arylene ether benzoxazole) s are presented in Table 5.3. 

Polymers containing thiocarbonylthio —S—CO—S— and oxycarbonylthio —O—CO—S— linkages (68) were prepared by catalyzed interfacial condensation of aliphatic dithiols, including 1,3-propanedithiol, 1,4-butanedithiol, and 1,6-hexanedithiol (3,234), or aromatic dithiols such as 1,3-dimercaptobenzen (1,3-benzenedithiol) [626-04-0] and 2,2-bis(4-mercaptophenyl)propane (BMP) (3, 235,236) with phosgene or bisphenol A bis(chloroformate) [2024-88-6] (235), respectively. 

Preliminary information on new aromatic polyformals based on other bisphenols is contained in Table 7. Most of these materials have been made only once and no extensive characterization of the polymers has been made. None of these polyformals were examined for cyclic oligomers. Where possible, the T for the corresponding polycarbonate is also given. All polymerizations were run in NMP/ CH9CI9 mixtures except when the bisphenol contained an electron 0... 

Choi et al. [9] also reported the synthesis of functional benzoxazine monomers and polymers containing phenylphosphine oxide. Phosphorus-containing group was introduced into polybenzoxazine via monomer modification. Three phosphorus-containing bisphenol compounds, bis(4-hydroxyphenyl)phenylphosphine oxide (BHPPO), bis(4-hydroxyphenoxyphenyl) phenylphosphine... 

Formation of mono- and di-quinone groups can be responsible for the yellowing of all polymers containing bisphenol-A groups. 

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