Abstract:
A copolymer including units derived from fluoro monomers of formula (I): CX1X2═CX3X4 (I) in which each of the X1, X2, X3 and X4 is independently chosen from H, F and alkyl groups including from 1 to 3 carbon atoms which are optionally partially or totally fluorinated, the H and/or F atoms of the fluoro monomers being partially replaced with photoactive groups of formula —Y—Ar—R in the copolymer; Y representing an oxygen atom or an NH group or a sulfur atom, Ar representing an aryl group, preferably a phenyl group, and R being a monodentate or bidentate group including from 1 to 30 carbon atoms. The fluoro monomers of formula (I) of the copolymer include vinylidene fluoride and trifluoroethylene. Also, a process for preparing this copolymer, a composition including this copolymer, and a film obtained from the copolymer.
Abstract:
A process for preparing a crosslinked fluoropolymer film, including the successive steps of: (1) formulating an ink containing: (a) the product of the reaction of triethylamine with at least one fluorinated copolymer obtained by radical copolymerization of monomers including: (i) vinylidene fluoride (VDF), (ii) trifluoroethylene (TrFE), (iii) at least one chlorinated monomer of formula —CXCl═CX1X2 where X, X1 and X2 independently denote H, F or CF3, wherein at most one of X, X1 and X2 denotes CF3; (b) at least one crosslinking agent; (c) at least one photoinitiator; and (d) at least one organic solvent; (2) applying said ink in film form to a substrate; and (3) UV-irradiating said film. Also, the film capable of being obtained according to this process, and also to the uses thereof, in particular in the manufacture of (opto)electronic devices and more particularly in the manufacture of a gate dielectric layer in a field-effect transistor.
Abstract:
A composite article including at least one electronic system, integrated onto the surface or in the volume of a thermoplastic matrix. The electronic system includes at least one piezoelectric transducer and means for transmitting an electrical signal. The piezoelectric transducer includes a piezoelectric polymer essentially consisting of, or consisting of, repeating units derived from vinylidene fluoride (VDF) and vinylidene trifluoride (TrFE), the molar proportion of the unit derived from TrFE being from 15% to 50% relative to the total number of moles of the units derived from VDF and TrFE. Also, the use of the electronic system and to the use of the article.
Abstract:
A copolymer including fluorinated units of formula (I): —CX1X2—CX3X4— (I) in which each of the X1, X2, X3 and X4 is independently chosen from H, F and alkyl groups including from 1 to 3 carbon atoms which are optionally partially or totally fluorinated; and fluorinated units of formula (II): —CX5X6—CX7Z— (II) in which each of the X5, X6 and X7 is independently chosen from H, F and alkyl groups including from 1 to 3 carbon atoms which are optionally partially or totally fluorinated, and in which Z is a photoactive group of formula —Y—Ar—R, Y representing an oxygen atom or an NH group or a sulfur atom, Ar representing an aryl group, and R being a monodentate or bidentate group including from 1 to 30 carbon atoms. Also, a process for preparing this copolymer, a composition including this copolymer, and a film obtained from this copolymer.
Abstract:
“The invention relates to a fluorinated copolymers which are particularly based on vinylidene fluoride (VDF) or trifluoroethylene (TrFE) and particularly functionalized by functional and/or functionizable vinyl ethers. The invention also relates to methods for producing said copolymers, and to the applications thereof.”
Abstract:
The present invention relates to compositions obtained by mixing specific electroactive fluoro-terpolymers and specific electroactive fluorinated copolymers. The invention also concerns liquid formulations (inks) that can be used through conventional processing technologies for printed electronics and microelectronics in a safe environment, based on these compositions. Another aspect of this invention are the films manufactured using these formulations, and the devices comprising at least one layer of these films.
Abstract:
The invention relates to a copolymer comprising units derived from monomers of vinylidene fluoride and/or trifluoroethylene, as well as fluorinated monomers X comprising a double bond and a leaving group selected from among chlorine, bromine and iodine atoms, the leaving groups being partially replaced by azide groups in the copolymer.
Abstract:
The present invention relates to the field of organic electronics for photovoltaic energy, i.e. conversion of light energy into electricity. More particularly, this invention relates to a method of fabrication of an active layer capable of emitting an electric current under light irradiation combining a ferroelectric polymer material and a semiconducting polymer for converting light energy into electricity.
Abstract:
A polymer including VDF-based units having an electrocaloric effect under the effect of a variable electric field. The polymer includes 0.1 to 10.0 mol % double bonds, which are substantially non-conjugated. Also, a corresponding composition including the polymer, a corresponding film including the polymer, and to various uses of the polymer.
Abstract:
A copolymer including fluorinated units of formula (I): —CX1X2—CX3X4— (I) in which each of the X1, X2, X3 and X4 is independently chosen from H, F and alkyl groups including from 1 to 3 carbon atoms which are optionally partially or totally fluorinated; and units of formula (III): —CXAXB—CXCZ— (III) in which each of the XA, XB and XC is independently chosen from H, F and alkyl groups including from 1 to 3 carbon atoms which are optionally partially or totally fluorinated, and Z being a polarizable group of formula —Y—Ar—R; Y representing an O atom or an S atom or an NH group, Ar representing an aryl group, and R being a monodentate or bidentate group including from 1 to 30 carbon atoms; and the copolymer having a heat of fusion of greater than or equal to 5 J/g. Also a process, a composition, an ink and a film.