17256-52-9Relevant articles and documents
CYCLODIMERIZATION OF PERFLUORO-2-METHYLENE-4-METHYL-1,3-DIOXOLANE
Yuminov, V. S.,Kartsov, S. V.,Maksimov, V. L.,Popova, O. A.,Makarov, K. M.
, p. 187 - 188 (1989)
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FLUOROLACTONE AND METHOD FOR PRODUCING SAME
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, (2021/12/03)
The present disclosure provides, for example, a method that can produce a fluorolactone compound from hexafluoropropylene oxide or the like in a single step. The present disclosure relates to a method for producing a compound represented by formula (1): wherein two R1 are the same and each is a fluorine atom or a fluoroalkyl group, the method comprising step A of reacting a compound represented by formula (2): wherein R1 is as defined above, with a compound (3) represented by formula (3-1) or the like: wherein R31, R32, and R33 are the same or different and each is a hydrogen atom or a C1-10 alkyl group, or two of them are optionally linked to each other to form a ring optionally having one or more substituents, in the presence of a fluorine compound (4) represented by formula (4-1) or the like: [in-line-formulae]MHnFm(4-1)[/in-line-formulae] wherein M is a metal atom, n is 0 or 1, and the sum of the valence number of M and n is m, and an organic solvent, provided that the compound represented by formula (3) is excluded from the organic solvent.
Synthesis and characterization of an amorphous perfluoropolymer: Poly(perfluoro-2-methylene-4-methyl-1,3-dioxolane)
Mikes, Frantisek,Yang, Yu,Teraoka, Iwao,Ishigure, Takaaki,Koike, Yasuhiro,Okamoto, Yoshiyuki
, p. 4237 - 4245 (2007/10/03)
A perfluorinated monomer, perfluoro-2-methylene-4-methyl-1,3-dioxolane (PFMMD), was synthesized by various methods. The monomer was polymerized in bulk and/or in the solution by a free radical mechanism using perfluorodibenzoyl peroxide and/or perfluorodi-ferf-butyl peroxide as an initiators. The polymers obtained (poly(PFMMD)) were colorless and transparent. However, a polymer rod exposed to the atmosphere turned hazy. When the polymers were purified by precipitating the polymer solution into chloroform, they did not turn hazy when exposed to air for a long period of time and remained clear with a high UV-vis light transmittance. The glass transition temperature of the purified polymer was 130-134 °C. NMR measurements indicate that the purified polymers have mostly vinyl addition polymer structure. Nevertheless, we suppose that the pristine polymers contain structural units formed by ring-opening polymerization. The molecular weight of poly(PFMMD) samples can be regulated using carbon tetrachloride, carbon tetrabromide, and sulfuryl chloride as chain transfer agents. Polymerization in the presence of these regulators is characterized by nondegradative chain transfer. The intrinsic viscosity of poly(PFMMD) samples was determined in hexafluorobenzene. Hexafluorobenzene is a thermodynamically good solvent for poly(PFMMD). The molecular weights of poly(PFMMD)s were characterized by the intrinsic viscosity and dynamic light scattering (DLS). The refractive index of poly(PFMMD) between 400 and 1550 nm was between 1.3360 and 1.3270. The material dispersion of poly(PFMMD) is superior to that of a commercial polyd,1,2,4,4,5,5,6,7,7-decafluoro-3-oxa-l,6- heptadiene) (Cytop).
