Development of Perfluoro Transparent Resins Obtained by Radical Cyclopolymerization for Leading-edge Electronic and Optical Applications.

Structure determination of the amorphous perfluorinated homopolymer: Poly[perfluoro(4-vinyloxyl-1-butene)]

“…Among sample 1-6, the initiator end group was fluorinated with fluorine gas for sample 1-3. The molecular weight was calculated from the relation, h inh = K Â M a (K = 2.284 Â 10 À4 , a = 0.5791), which Nakamura et al provided [3].…”

“…The flow rate was 0.2 ml/min for eluent:perfluoro(2-butyltetrahydrofuran). The molecular weight was calibrated with Cytop 1 whose molecular weight was determined by the light scattering measurement [3].…”

“…Teflon 1 AF is a copolymer of tetrafluoroethylene (TFE) and perfluoro-2,2-dimethyl dioxole (PDD) which possesses a cyclic structure in its monomer unit. On the other hand, Cytop 1 is a homopolymer of perfluoro(4-vinyloxyl-1-butene) which is denoted in this paper as butenyl vinyl ether (BVE), and then, cyclopolymerization gives the cyclic structure on polymer chain [1][2][3]. In cyclopolymerization of BVE, two kinds of probable cyclic structures, penta-and hexa-cyclic, can be considered as shown in Scheme 1.…”

Study on the Main‐Chain Structure of Amorphous Fluorine Resins for Encapsulating AlGaN‐Based DUV‐LEDs

“…In this work, a study was conducted on another commercially available amorphous fluorine resin, that is, perfluoro‐2,2‐dimethyl‐1,3 dioxole (PDD) copolymerized with tetrafluoroethylene (TFE‐co‐PDD) . TFE‐co‐PDD has a different main chain structure from p‐BVE and has DUV transmittance . A reliability test shows that the decomposition of the ring structure of TFE‐co‐PDD causes an increase in the leakage current for both 262 and 289 nm LEDs.…”

Theoretical prediction of structural, vibrational and NMR parameters of plastic optical fiber (POF) material precursors. Cis and trans perhydro- and perfluoro-2-methylene-4,5-dimethyl-1,3-dioxolanes

“…Historically, the free radical homopolymerization leading to tetrafluoroethylene was applied by Du Pont in 1937 [12]. On the other hand, perfluorodiene monomers were introduced by Asahi Glass in 1989 [13,14].…”