Preparation of hyperbranched macromolecules with aryl fluoride and phenol terminal functionalities using new monomers and Cs2CO3 or Mg(OH)2 as the condensation agent

Catalytic Cs<sub>2</sub>CO<sub>3</sub> Promotes “Silyl Method”-Type Polycondensation

“…Yield and inherent viscosities of the polymers prepared here are also well comparable to polyethersulfones as they have been reported very recently [15]. Cesium carbonate has been used as reagent in equimolar amounts alone or 0.5 -1 equivalents in combination with additional reagents in diaryl ether synthesis and polycondensation reactions [18][19][20][21][22][23][24][25].…”

Catalytic Cs<sub>2</sub>CO<sub>3</sub> Promotes “Silyl Method”-Type Polycondensation

“…Yield and inherent viscosities of the polymers prepared here are also well comparable to polyethersulfones as they have been reported very recently [15]. Cesium carbonate has been used as reagent in equimolar amounts alone or 0.5 -1 equivalents in combination with additional reagents in diaryl ether synthesis and polycondensation reactions [18][19][20][21][22][23][24][25].…”

Hyperbranched Thermotropic Liquid Crystalline Polyesters Composed of Aromatic Ester Type Mesogens and Polymethylene Spacers

“…It should be noted that the relatively large size of the repeating units of the present polymers lends itself to a fairly high molar mass despite the relatively low degree of polymerization. Polydispersity index (PDI) values of PI(5) and PI(10a) are 1.49 and 2.15, respectively, which are much lower than the values reported − for other hyperbranched polymers prepared by step-reaction polymerization. This is probably due to the fact that the present polymers were purified in two precipitation steps in which low molar mass fractions were removed from the final polymer product.…”

Comb-Shaped Poly(arylene ether sulfone)s as Proton Exchange Membranes

“…The activated fluorine of F3FAP was reacted with FTP. The resulting FTP3FK was then condensed with 2 mol of phenol to produce the bisphenol (3FBPT) . The overall yield of the two step reaction was above 90%, and the proposed structure was confirmed by 1 H NMR spectra.…”

Catalytic Cs<sub>2</sub>CO<sub>3</sub> Promotes “Silyl Method”-Type Polycondensation

“…Yield and inherent viscosities of the polymers prepared here are also well comparable to polyethersulfones as they have been reported very recently [15]. Cesium carbonate has been used as reagent in equimolar amounts alone or 0.5 -1 equivalents in combination with additional reagents in diaryl ether synthesis and polycondensation reactions [18][19][20][21][22][23][24][25].…”

Hyperbranched Thermotropic Liquid Crystalline Polyesters Composed of Aromatic Ester Type Mesogens and Polymethylene Spacers

“…It should be noted that the relatively large size of the repeating units of the present polymers lends itself to a fairly high molar mass despite the relatively low degree of polymerization. Polydispersity index (PDI) values of PI(5) and PI(10a) are 1.49 and 2.15, respectively, which are much lower than the values reported − for other hyperbranched polymers prepared by step-reaction polymerization. This is probably due to the fact that the present polymers were purified in two precipitation steps in which low molar mass fractions were removed from the final polymer product.…”

Comb-Shaped Poly(arylene ether sulfone)s as Proton Exchange Membranes

“…The activated fluorine of F3FAP was reacted with FTP. The resulting FTP3FK was then condensed with 2 mol of phenol to produce the bisphenol (3FBPT) . The overall yield of the two step reaction was above 90%, and the proposed structure was confirmed by 1 H NMR spectra.…”

Catalytic Cs<sub>2</sub>CO<sub>3</sub> Promotes “Silyl Method”-Type Polycondensation

“…Yield and inherent viscosities of the polymers prepared here are also well comparable to polyethersulfones as they have been reported very recently [15]. Cesium carbonate has been used as reagent in equimolar amounts alone or 0.5 -1 equivalents in combination with additional reagents in diaryl ether synthesis and polycondensation reactions [18][19][20][21][22][23][24][25].…”

Hyperbranched Thermotropic Liquid Crystalline Polyesters Composed of Aromatic Ester Type Mesogens and Polymethylene Spacers

“…It should be noted that the relatively large size of the repeating units of the present polymers lends itself to a fairly high molar mass despite the relatively low degree of polymerization. Polydispersity index (PDI) values of PI(5) and PI(10a) are 1.49 and 2.15, respectively, which are much lower than the values reported − for other hyperbranched polymers prepared by step-reaction polymerization. This is probably due to the fact that the present polymers were purified in two precipitation steps in which low molar mass fractions were removed from the final polymer product.…”

Comb-Shaped Poly(arylene ether sulfone)s as Proton Exchange Membranes

“…The activated fluorine of F3FAP was reacted with FTP. The resulting FTP3FK was then condensed with 2 mol of phenol to produce the bisphenol (3FBPT) . The overall yield of the two step reaction was above 90%, and the proposed structure was confirmed by 1 H NMR spectra.…”