The Application of Controlled/Living Radical Polymerization in Modification of PVDF-based Fluoropolymer

Methyl Methacrylate-co-glycidyl Methacrylate-Based Dielectric Films with High Breakdown Strength and Discharge Energy Density Tailored by PVDF

“…In the past 10 years, polymer-based film capacitors have attracted wide attention due to the merits of high breakdown strength, low dielectric loss, high power density, and fast charge/discharge speed, which are widely used in hybrid vehicles, medical defibrillators, high energy density pulsed power, and smart power grids. − Polymers can be divided into linear dielectric materials such as polypropylene (PP), poly­(ethylene terephthalate), poly­(ethylene 2,6naphthalate), and poly­(methyl methacrylate) (PMMA) and non-linear dielectric materials such as poly­(vinylidene fluoride) (PVDF) and its copolymers according to different dielectric properties. ,− Compared with other dielectric materials, such as ceramics, the main disadvantage of polymer dielectric materials is their low polarization capacity and energy storage density . Therefore, how to achieve high energy storage density of polymer dielectric films has become the hot-spot and difficulty in the research field of polymer thin-film capacitors.…”

Controllable synthesis and structural design of novel all-organic polymers toward high energy storage dielectrics

“…One of the commonly used chemical methods is “graft-from” ATRP as C-Cl bond on CTFE units as macro-initiator, which can introduce different kinds of side chains to form micro-insulator layers surrounding the ferroelectric domains. We have made a detailed summary of the research in this area before ( Gong et al, 2021 ), and here is only a brief introduction to the application of CRP in the modification of P(VDF-CTFE) or its copolymer.…”

“…Polymers with various topologies, such as block, graft, gradient, star, brush, dendrimer and hyperbranched polymers could be synthesized by CRP technology. In addition, CRP is also a commonly used method to modify materials in order to adjust their chemical and physical properties ( Figure 2 ) ( Bagheri et al, 2021 ; Corrigan et al, 2021 ; Gong et al, 2021 ; Zhou et al, 2021 ; Antonopoulou et al, 2022 ; Zhang et al, 2022b ; Li et al, 2022b ; Zhou et al, 2022c ; Corbin and Miyake, 2022 ; Dworakowska et al, 2022 ). ROMP is a relatively new research field in the preparation of polymer materials, which has all the characteristics of olefin metathesis reactions.…”

Facile grafting modification of main-chain-type semi-fluorinated alternating fluoropolymersviasimultaneous CuAAC reaction and ATRP in one pot at ambient temperature

“…[21][22][23][24][25][26][27] Atom transfer radical polymerization (ATRP) as one of the RDRP methods is a powerful technique in polymer chemistry [28][29][30] that is often employed to synthesize fluorinated graft copolymers. [31][32][33][34] For example, chlorine on the main-chain-type polychlorotrifluoroethylene (PCTFE) backbone is utilized as an initiator and various side chains can be introduced into the PCTFE backbone via ATRP. 31,32,[35][36][37][38] In addition, some researchers also synthesized main-chain-type fluorinated graft copolymers from VDF-containing fluorinated polymers using C-F bonds as the initiating sites, 22,34,39,40 but the initiating efficiency was very low due to the low reactivity of the secondary fluorine atoms 41 and careful examination to support the successful grafting is missing.…”

“…[31][32][33][34] For example, chlorine on the main-chain-type polychlorotrifluoroethylene (PCTFE) backbone is utilized as an initiator and various side chains can be introduced into the PCTFE backbone via ATRP. 31,32,[35][36][37][38] In addition, some researchers also synthesized main-chain-type fluorinated graft copolymers from VDF-containing fluorinated polymers using C-F bonds as the initiating sites, 22,34,39,40 but the initiating efficiency was very low due to the low reactivity of the secondary fluorine atoms 41 and careful examination to support the successful grafting is missing. 33 More importantly, it is not difficult to see that these monomers of the main-chain-type fluoropolymers including, VDF and CTFE, are usually gaseous (<4 carbon atoms) and the feeding requires relatively complex operating skills and harsh conditions, 42 where the backbone structures of fluorinated graft copolymers are also very limited.…”