General features of the reaction of 4,4?-difluorobenzophenone with potassium diphenoxide of 2,2-bis (4-hydroxyphenyl)propane

Shaposhnikova, V. V.; Салазкин, С. Н.; Сергеев, В. А.; Blagodatskikh, I. V.; Dubrovina, L.V.; Sakunts, A. A.; Pavlova, S.-S.A.

doi:10.1007/bf01435391

Cited by 18 publications

(11 citation statements)

References 8 publications

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“…It has been previously shown that the BC method is more accurate, as it discriminates the bonds between the main chain and side groups that contribute significantly to polymer rigidity [ 59 ]. We can observe the same picture in Table 7 , as follows: MAPEs and MPEs are mainly lower for BC, except for the C2 polymer.…”

Section: Resultsmentioning

confidence: 99%

“…The synthesis of poly(arylene ether ketone)s (PAEKs: C1–C3, Figure 1 ) was carried out by polycondensation method according to the mechanism of the reaction of nucleophilic substitution of activated halogen in arylene dihalide, by the interaction of 4,4′-difluorobenzophenone with dipotassium phenolates of bisphenols (bisphenol A, bisphenol AF, phenolphthalein), similar to the method described in [ 59 ] ( Figure 1 ). Further, 4,4′-Difluorobenzophenone (0.0988 mol), bi-sphenol(2,2-bis(4′-hydroxyphenyl)propane or 2,2-bis(4′-hydroxyphenyl)hexafluoropropane or 3,3-bis(4′-hydroxyphenyl) phthalide) (0.1 mol), 4-fluorobenzophenone (0.0024 mol), pre-milled freshly calcined K2CO3 (0.13 mol), N,N-dimethylacetamide (200 mL), and chlorobenzene (100 mL) were loaded in an argon-blown four-necked flask equipped with a stirrer, an argon supply tube, and a system for azeotropic removal of water.…”

Section: Methodsmentioning

confidence: 99%

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Structure-Property Relationship on the Example of Gas Separation Characteristics of Poly(Arylene Ether Ketone)s and Poly(Diphenylene Phtalide)

et al. 2021

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Three poly(arylene ether ketone)s (PAEKs) with propylidene (C1, C2) and phtalide (C3) fragments, and one phtalide-containing polyarylene (C4), were synthesized. Their chemical structures were confirmed via 1H NMR, 13C NMR and 19F NMR spectroscopy. The polymers have shown a high glass transition temperature (>155 °C), excellent film-forming properties, and a high free volume for this polymer type. The influence of various functional groups in the structure of PAEKs on gas transport parameters was evaluated. Expectedly, due to the higher free volume, the introduction of the hexafluoropropylidene group to PAEK resulted in a higher increase of gas permeability in comparison with the propylidene group. The substitution of the fluorine-containing group on a rigid phtalide moiety (C3) significantly increases the glass transition temperature of the polymer, while the gas permeation slightly decreases. Finally, the removal of two ether groups from the PAEK structure (C4) leads to a rigid polymer chain that is characterized by the highest free volume, gas permeability, and diffusion coefficients among the PAEKs under investigation. Also, theoretically predicted transport parameters were investigated, to further study the structure–properties relationship for the PAEKs. Methods of modified atomic (MAC) and bond (BC) contributions were applied for this purpose (estimation of gas permeation and diffusion). Gas solubility coefficients for PAEKs were forecasted by the “Short polymer chain surface based prediction” (SPCSBP) method. Both the MAC and BC techniques showed reasonable predicted parameters for three polymers, while a significant underestimation of gas transport parameters was observed for C4. The results for all three prediction methods were compared with the experimental data obtained in this work. The predicted parameters were in good agreement with the experimental data for phtalide-containing polymers (C3 and C4), while for propylidene-containing poly(arylene ether ketone)s they were overestimated, due to a possible influence of the propylidene fragment on the indices of the oligomeric chains. MAC and BC methods demonstrated a better prediction power than the SPCSBP method.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Structure-Property Relationship on the Example of Gas Separation Characteristics of Poly(Arylene Ether Ketone)s and Poly(Diphenylene Phtalide)

et al. 2021

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“…The co-PAEKs shown in Figure 1 were synthesized by polycondensation of 4,4difluorobenzophenone with dipotassium bisphenolates proceeding from the mechanism of nucleophilic substitution of activated halogen in the aryl dihalide, analogously to the earlier described preparation of homopolymers [13]. The concentration of the bisphenols mixture was 0.5 mol per 1 L of the solvent, with a 30% excess of K 2 CO 3 .…”

Section: Methodsmentioning

confidence: 99%

Radiation-Induced Transient Currents in Films of Poly(arylene ether ketone) Including Phthalide Moiety

et al. 2019

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The electrical properties of thin films of poly(arylene ether ketone) copolymers (co-PAEKs) with a fraction of phthalide-containing units of 3, 5, and 50 mol% in the main chain were investigated by using radiation-induced conductivity (RIC) measurements. Transient current signals and current-voltage (I-V) characteristics were obtained by exposing 20 ÷ 25 µm thick films of the co-PAEKs to monoenergetic electron pulses with energy ranging from 3 to 50 keV in an electric field ranging from 5 to 40 V/µm. The Rose-Fowler-Vaisberg semi-empirical model based on a multiple trapping formalism was used for an analysis of the RIC data, and the parameters of the highly dispersive charge carrier transport were evaluated. The analysis revealed that charge carriers moved in isolation from each other, and the applied electric fields were below the threshold field triggering the switching effect (a reversible high-to-low resistivity transition) in the co-PAEK films. It was also found that the co-PAEK films, due to the super-linear I-V characteristics, are highly resistant to electrostatic discharges arising from the effects of ionizing radiation. This property is important for the development of protective coatings for electronic devices.

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“…Fig. 1 were synthesized by polycondensation of 4,4'difluorobenzophenone with dipotassium bisphenolates proceeding by the mechanism of nucleophilic substitution of activated halogen in the aryl dihalide analogously to the earlier described preparation of homopolymers [13]. The concentration of the bisphenols mixture was 0.5 mol per 1 liter of the solvent with K2CO3 being in the 30% excess.…”

Section: Introductionmentioning

confidence: 99%

Radiation Induced Transient Currents in Films of Poly(Arylene Ether Ketone) Including Phthalide Moiety

Pozhidaev¹,

Shaposhnikova²,

Tameev³

et al. 2019

Preprint

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Electrical properties of the thin films of poly(arylene ether ketone) copolymers (co-PAEKs) with the fraction of phthalide-containing units of 3, 5 and 50 mol% in the main chain were investigated by using radiation induced conductivity (RIC) measurements. Transient current signals and current-voltage (I-V) characteristics were obtained under exposing 20÷25 thick films of the co-PAEKs to monoenergetic electron pulses of the energy ranged from 3 to 50 keV in the electric field ranged from 5 to 40 V/μm. The Rose-Fowler-Vaisberg semi-empirical model based on a multiple trapping formalism was used for an analysis of the RIC data and the parameters of the highly dispersive charge carrier transport were evaluated. The analysis revealed that charge carriers moved in isolation from each other and the applied electric fields were below the threshold field triggering the switching effect (a reversible high-to-low resistivity transition) in the co-PAEK films. It was also found that the co-PAEK films due to the super-linear I-V characteristics are highly resistant to electrostatic discharges arising from the effects of ionizing radiation. This property is important for the development of protective coatings for electronic devices.

show abstract

General features of the reaction of 4,4?-difluorobenzophenone with potassium diphenoxide of 2,2-bis (4-hydroxyphenyl)propane

Cited by 18 publications

References 8 publications

Structure-Property Relationship on the Example of Gas Separation Characteristics of Poly(Arylene Ether Ketone)s and Poly(Diphenylene Phtalide)

Structure-Property Relationship on the Example of Gas Separation Characteristics of Poly(Arylene Ether Ketone)s and Poly(Diphenylene Phtalide)

Radiation-Induced Transient Currents in Films of Poly(arylene ether ketone) Including Phthalide Moiety

Radiation Induced Transient Currents in Films of Poly(Arylene Ether Ketone) Including Phthalide Moiety

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