Dielectric studies of tetraaryl and triaryl polycarbonates and comparisons with bisphenol A‐polycarbonate

Fontanella, J. J.; Boyles, David A.; Filipova, Tsvetanka; Awwad, Shady; Edmondson, Charles A.; Bendler, John T.; Wintersgill, M. C.; Lomax, Joseph F.; Schroeder, Maria J.

doi:10.1002/polb.23010

Cited by 13 publications

(32 citation statements)

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“…Fontanella et al. [ 74 ] synthesized copolymer of tetraaryl polycarbonate and bisphenol A polycarbonate (BPA‐PC), which increased the T g to 187 °C, owing to the increased rigidity of polymer by inserting more benzene rings into the main chain of PC. Bendler et al.…”

Section: Dielectric Polymers For Film Capacitorsmentioning

confidence: 99%

Research Progress of All Organic Polymer Dielectrics for Energy Storage from the Classification of Organic Structures

Luo

Mao

Sun

et al. 2021

Macro Chemistry & Physics

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Dielectric films are the foundation of power electronic equipment for energy storage in capacitors. However, typical dielectric films exhibit undesirable energy storage density and thermal stability, limiting its further application in the advanced field. For both pure polymers and composites‐based dielectrics, the macromolecular matrix greatly determines the performances. This paper summarizes the research progress of all‐organic polymer materials for the dielectric application from the perspective of molecular structure design. Systematic comparisons on properties, including dielectric constant and dielectric loss, glass transition temperature, and energy density are given, expecting to inspire researchers to devote further efforts in this area. An outlook for the future of all‐polymer dielectrics is also presented.

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Section: Dielectric Polymers For Film Capacitorsmentioning

confidence: 99%

Research Progress of All Organic Polymer Dielectrics for Energy Storage from the Classification of Organic Structures

Luo

Mao

Sun

et al. 2021

Macro Chemistry & Physics

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“…Repeating units of various polycarbonates: (a) bisphenol A-polycarbonate (BPA-PC), (b) triaryl polycarbonate (TriBPA-PC), (c) 50–50 mole fraction random copolymer of tetraaryl polycarbonate with BPA-PC (TABPA-BPA-PC), (d) fluorine-substituted tetraaryl polycarbonate (Di-F-p-TABPA-PC), and (e) cyano-substituted polycarbonate (CN-PC). Structures taken from refs − with permission from Wiley Periodical, Inc., Elsevier Ltd., and American Chemical Society.…”

Section: Recently Developed High Temperature Polymersmentioning

confidence: 99%

“…Dielectric loss (ε″) as a function of temperature at 10 kHz for the commercial BPA-PC, TriBPA-PC, and TABPA-PC. Figure reproduced from ref Figure 4 with permission from Wiley Periodical, Inc.…”

Section: Recently Developed High Temperature Polymersmentioning

confidence: 99%

“…As discussed in Section 4.2, the presently available polycarbonate (PC) capacitor film, which is made from bisphenol A (BPA) containing two aromatic rings in the repeating unit (Figure 43a), is limited to a maximum operating temperature of 125 °C, above which the dielectric constant (∼2.94) and DF (<0.1% at 1 kHz) increased as the temperature passed through the T g at 150 °C. In view of the reasonably low DF and stable capacitance possessed by the BPA-PC, Fontanella et al 141 synthesized two new polycarbonates with higher T g based on the BPA chemistry with monomers containing additional aromatic rings in the backbone to increase rigidity. One of the two new PCs (TriBPA-PC in Figure 43b) contained three aromatic rings in the repeating unit and showed a T g of 190 °C, while the other is a copolymer of 50/50 mol % of tetra-aryl PC and BPA-PC, denoted as TABPA-BPA-PC in Figure 43c with a T g of 187 °C.…”

Section: Acs Applied Materials and Interfacesmentioning

confidence: 99%

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Polymer Capacitor Dielectrics for High Temperature Applications

Greenbaum

2018

ACS Appl. Mater. Interfaces

262

164

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Much effort has been invested for nearly five decades to identify and develop new polymer capacitor dielectrics for higher than ambient temperature applications. Simultaneous demands of processability, dielectric permittivity, thermal conductivity, and dielectric breakdown strength dictated by increasing high power performance criteria limit the number of available materials. The present review first explains the advantages of metallized polymer film capacitors over the film-foil, ceramic, and electrolytic counterparts and then presents a comprehensive review on both past developmental effort of commercial resins and recent research progress on new polymers targeted for operating temperature above 150 °C. Some historical background and discussion on the limitation of the commercially available polymer film dielectrics for high temperature applications are also given. In many cases, further development of promising polymers that appear to possess all or most of the important criteria is limited by lack of large scale market incentives but could be of great value to niche applications in the military or aerospace realm.

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“…This has involved efforts to replace the traditional nonpolar polymers such as polyethylene and polypropylene with polar polymers. These studies have included polar materials such as poly vinylidene fluoride (PVDF), PVDF‐related co‐ and terpolymers, polycarbonates, polar group‐functionalized polyolefins, poly sulfones, and aromatic poly thioureas, to name a few. However, the temperature, electric field strength, and time‐domain responses of polar polymers, particularly those exhibiting ferroelectric behavior, can be extremely complex compared with traditional nonpolar polymers.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamic study of dielectric polarization and ferroelectricity in a model polar polymer

Calame

2015

J Polym Sci B Polym Phys

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Molecular dynamics simulations are used to explore the polarization response of a lamellar crystal consisting of folded chains of a highly simplified model polar polymer. The system is based on a united atom model of polyethylene with constrained bond lengths and bond angles, and it is endowed with artificial partial charges placed on the united atoms to give it a simple polar character. Simulations performed with various temperatures, electric field directions, and electric field application histories reveal a complicated sequence of reorientation processes, including pronounced ferroelectric behavior. The sequence includes a weak, temperature‐independent prompt response, and a slow‐rising delay regime with stretched exponential behavior and thermally‐activated reorientation parameters consistent with trans‐gauche (TG) barrier crossings in the amorphous phase. When the delay regime has progressed sufficiently, a primary large‐amplitude response due to organized rotation of large subsegments in the crystalline phase occurs in a rapid manner that requires relatively few TG barrier crossings. A final, extremely slow rise in residual polarization completes the sequence. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2015, 53, 740–759

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Dielectric studies of tetraaryl and triaryl polycarbonates and comparisons with bisphenol A‐polycarbonate

Cited by 13 publications

References 99 publications

Research Progress of All Organic Polymer Dielectrics for Energy Storage from the Classification of Organic Structures

Research Progress of All Organic Polymer Dielectrics for Energy Storage from the Classification of Organic Structures

Polymer Capacitor Dielectrics for High Temperature Applications

Molecular dynamic study of dielectric polarization and ferroelectricity in a model polar polymer

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