摘要:
Provided is a separator for a non-aqueous secondary battery, the separator contains a porous substrate and an adhesive porous layer that is provided on one side or on both sides of the porous substrate, and that contains a polyvinylidene fluoride type resin and an inorganic filler, in which an average primary particle size of all of the inorganic filler contained in the adhesive porous layer is from 0.01 µm to less than 0.50 µm, and when differential scanning calorimetry is performed with all of the polyvinylidene fluoride type resin contained in the adhesive porous layer as a sample, two or more endothermic peaks and/or two or more exothermic peaks are observed.
摘要:
Described herein is a polymer comprising: interpolymerized units of (i) a fluorinated terminal alkene monomer and (ii) a tertiary amine-containing fluorinated monomer comprising at least one of a vinyl amine, a substituted vinyl amine, an allyl amine, a substituted allyl amine, and combinations thereof; wherein the polymer can be amorphous or semi-crystalline with a melting point no greater than 325C. Dispersions thereof and methods of making and using the same are also described.
摘要:
A piezoelectric film which is better in heat and deformation resistant properties than those in the prior art is provided along with a method of making the same. The film is a piezoelectric film that is composed of a copolymer of vinylidene fluoride and trifluoroethylene, the copolymer having a content of vinylidene fluoride in a range of not less than 82 mol % and not more than 86 mol % and having a molecular weight not less than 600,000. The piezoelectric film is subjected to a heat treatment for crystallization of the copolymer at a temperature ranging from not less than 140°C to not more than 150°C, and is thereby caused to develop piezoelectric property. The piezoelectric film is further characterized in that it has a heat resistance of not less than 140°C and a breaking distortion of not less than 8 % and not more than 55 %, and an excellent deformation resistant property.
摘要:
The invention relates to very high melt flow fluoropolymer compositions, having low melt viscosities. The fluoropolymers have low molecular weights of from 5 kDa to 200 kDa and melt viscosities of less than 2 kilopoise (kP) at 232° C. and 100 s−1. One use for the high melt flow fluoropolymers is in the formation of very small diameters fibers, useful for melt-blown non-woven materials. Fiber diameters of less than 9 microns, and preferably 500 to 2000 nm can be produced.
摘要:
The invention relates to novel linear, semi-crystalline fluoropolymers containing 0.5 to 25 mole percent of at least one vinyl ester monomer unit. At least 40 mole percent of the vinyl ester monomer units are present in the copolymer as single monomer units (not diads or triads or greater) between two fluoromonomer units. The invention also relates to a process for forming the fluoromonomers/vinyl ester copolymer. The fluoropolymer of the invention may be used in applications benefiting from a functional fluoropolymers including as a binder, or for use in forming hydrophilic membranes and hollow fibers.
摘要:
The invention relates to very high melt flow fluoropolymer compositions, having low melt viscosities. The fluoropolymers have low molecular weights of from 5 kDa to 200 kDa and melt viscosities of less than 2 kilopoise (kP) at 232° C. and 100 s−1. One use for the high melt flow fluoropolymers is in the formation of very small diameters fibers, useful for melt-blown non-woven materials. Fiber diameters of less than 9 microns, and preferably 500 to 2000 nm can be produced.
摘要:
An object of the present invention is to provide an aqueous vinylidene fluoride-based polymer composition capable of providing a mixture for a non-aqueous electrolyte secondary battery exhibiting excellent adhesive strength with a current collector, wherein the aqueous vinylidene fluoride-based polymer composition of the present invention comprises a vinylidene fluoride-based polymer and water; the vinylidene fluoride-based polymer exhibits a multi-modal scattering intensity distribution in dynamic light scattering; the vinylidene fluoride-based polymer comprises a component A having a particle size of not greater than 1 µm in a scattering intensity distribution and a component B having a particle size exceeding 1 µm; the D50 of component A is from 0.02 to 0.5 µm; the D50 of component B is from 1.1 to 50 µm; and the integrated value of a scattering intensity distribution frequency in a particle size range of from 1.0 to 1000.0 nm is in a range of from 70.0 to 98.7%.
摘要:
An object of the present invention is to provide an aqueous vinylidene fluoride-based polymer composition capable of providing a mixture for a non-aqueous electrolyte secondary battery exhibiting excellent adhesive strength with a current collector, wherein the aqueous vinylidene fluoride-based polymer composition of the present invention comprises a vinylidene fluoride-based polymer and water; the vinylidene fluoride-based polymer exhibits a multi-modal scattering intensity distribution in dynamic light scattering; the vinylidene fluoride-based polymer comprises a component A having a particle size of not greater than 1 µm in a scattering intensity distribution and a component B having a particle size exceeding 1 µm; the D50 of component A is from 0.02 to 0.5 µm; the D50 of component B is from 1.1 to 50 µm; and the integrated value of a scattering intensity distribution frequency in a particle size range of from 1.0 to 1000.0 nm is in a range of from 70.0 to 98.7%.