摘要:
A transparent piezoelectric sheet includes a quadrilateral-shaped transparent piezoelectric film and a first transparent plate electrode. The quadrilateral-shaped transparent piezoelectric film includes an organic polymer. The quadrilateral-shaped transparent piezoelectric film has entire main surfaces that are piezoelectric. The first transparent plate electrode is layered on part of a first main surface of the main surfaces of the transparent piezoelectric film. One to three sides of the four sides of the quadrilateral shape of the transparent piezoelectric film and area(s) of the first main surface adjacent thereto are not covered by the first transparent plate electrode.
摘要:
There is provided a method of forming a thin film of vinylidene fluoride homopolymer having crystal form I which is applicable to various substrates in relatively easy way (coating conditions, application method, etc.), a process for preparing a vinylidene fluoride homopolymer having crystal form I efficiently at high purity, and novel vinylidene fluoride homopolymers which can give a thin film being excellent in ferroelectricity. The method of forming a thin film of vinylidene fluoride homopolymer comprises (i) a step for preparing a green powder product of vinylidene fluoride homopolymer comprising crystal form I alone or as main component by subjecting vinylidene fluoride to radical polymerization in the presence of a bromine compound or iodine compound having 1 to 20 carbon atoms which contains at least one moiety represented by —CRf1Rf2X1, wherein X1. is iodine atom or bromine atom; Rf1. and Rf2. are the same or different and each is selected from fluorine atom or perfluoroalkyl groups having 1 to 5 carbon atoms and (ii) a step for forming a thin film on a substrate surface by using vinylidene fluoride homopolymer which comprises crystal form I alone or as main component and is obtained from the green powder product of vinylidene fluoride homopolymer comprising crystal form I alone or as main component.
摘要翻译:提供一种以相对容易的方式(涂布条件,涂布方法等)形成可以适用于各种基材的结晶形式I的偏二氟乙烯均聚物的薄膜的方法,制备具有结晶形式的偏二氟乙烯均聚物 我高效率地得到高纯度的新型偏二氟乙烯均聚物,可以得到铁电性优异的薄膜。 形成偏氟乙烯均聚物薄膜的方法包括(i)通过在溴化合物的存在下使偏二氟乙烯进行自由基聚合,制备单晶或单体晶形的偏二氟乙烯均聚物的生粉产物的步骤 或含有至少一个由-CR f 1 R f 2 X 1表示的部分的具有1至20个碳原子的碘化合物,其中X1。 是碘原子或溴原子; Rf1。 和Rf2。 相同或不同,分别选自具有1至5个碳原子的氟原子或全氟烷基,和(ii)通过使用单晶形式的主要含氟乙烯均聚物或作为主要成分的偏氟乙烯均聚物在基材表面上形成薄膜的步骤 从单独的晶形I或作为主要成分的偏氟乙烯均聚物的绿色粉末产品获得。
摘要:
The present invention provides a process for easily preparing a vinylidene fluoride homopolymer comprising an I-form crystal structure at high purity by selecting a solvent, and the process for preparing the vinylidene fluoride homopolymer comprises not less than 70% by mass of I-form crystal structure, which is obtained by dissolving a vinylidene fluoride homopolymer having a number average degree of polymerization of 3 to 20 in a solvent consisting of an organic solvent having a dipole moment of not less than 2.8 alone or comprising the organic solvent in a part, thereafter, evaporating the solvent.
摘要:
A transparent piezoelectric sheet-with-a-frame includes a transparent piezoelectric sheet and a frame covering a peripheral edge portion of the transparent piezoelectric sheet. The transparent piezoelectric sheet includes one transparent piezoelectric film including an organic polymer, one first transparent plate electrode placed on a first main surface of the transparent piezoelectric film and having a first transparent plate electrode portion, and one second transparent plate electrode placed on a second main surface of the transparent piezoelectric film and having a second transparent plate electrode portion. An outline of the second transparent plate electrode portion is positioned inside an outline of the first transparent plate electrode portion as seen in a plan view. The outline of the first transparent plate electrode portion completely coincides with the frame, and the outline of the second transparent plate electrode portion does not at all coincide with the frame as seen in the plan view.
摘要:
A transparent piezoelectric sheet includes a quadrilateral-shaped transparent piezoelectric film and a first transparent plate electrode. The quadrilateral-shaped transparent piezoelectric film includes an organic polymer. The quadrilateral-shaped transparent piezoelectric film has entire main surfaces that are piezoelectric. The first transparent plate electrode is layered on part of a first main surface of the main surfaces of the transparent piezoelectric film. One to three sides of the four sides of the quadrilateral shape of the transparent piezoelectric film and area(s) of the first main surface adjacent thereto are not covered by the first transparent plate electrode.
摘要:
The present invention provides a process for easily preparing a vinylidene fluoride homopolymer comprising an I-form crystal structure at high purity by selecting a solvent, and the process for preparing the vinylidene fluoride homopolymer comprises not less than 70% by mass of I-form crystal structure, which is obtained by dissolving a vinylidene fluoride homopolymer having a number average degree of polymerization of 3 to 20 in a solvent consisting of an organic solvent having a dipole moment of not less than 2.8 alone or comprising the organic solvent in a part, thereafter, evaporating the solvent.
摘要:
There is provided a pyroelectric infrared sensor being capable of changing its shape and having high sensitivity. The sensor comprises the substrate 11 made of a polymer material such as polyimide or polyethylene terephthalate and having flexibility, the layer 13 comprising vinylidene fluoride (VDF), and the flexible electrodes 12 and 14 comprising an Al-deposited film and provided on and under the VDF oligomer layer 13. The pyroelectric infrared sensor of the present invention has flexibility as a whole due to flexibility of each component elements and can be formed into desired shapes. In addition, since a substrate made of a polymer material has heat capacity and heat conductivity lower than those of Si substrates used on conventional pyroelectric infrared sensors, sensitivity of the sensor can be increased.
摘要:
There is provided a method of forming a ferroelectric thin film of vinylidene fluoride homopolymer having crystal form I which is applicable to various substrates in relatively easy way (coating conditions, application method, etc.). The method of forming a ferroelectric thin film comprising vinylidene fluoride homopolymer comprises the step (i) for preparing a green powder of vinylidene fluoride homopolymer comprising crystal form I alone or as main component by subjecting vinylidene fluoride to radical polymerization in the presence of a radical polymerization initiator, the step (ii) for forming a thin film on a substrate surface by using vinylidene fluoride homopolymer which comprises crystal form I alone or as main component and is obtained from the green powder product of vinylidene fluoride homopolymer comprising I-form crystal structure alone or as main component, and the step (iii) for subjecting the thin film of vinylidene fluoride homopolymer formed in the step of above (ii) to polarization.
摘要:
There is provided a method of forming a thin film of vinylidene fluoride homopolymer having crystal form I which is applicable to various substrates in relatively easy way (coating conditions, application method, etc.), a process for preparing a vinylidene fluoride homopolymer having crystal form I efficiently at high purity, and novel vinylidene fluoride homopolymers which can give a thin film being excellent in ferroelectricity. The method of forming a thin film of vinylidene fluoride homopolymer comprises (i) a step for preparing a green powder product of vinylidene fluoride homopolymer comprising crystal form I alone or as main component by subjecting vinylidene fluoride to radical polymerization in the presence of a bromine compound or iodine compound having 1 to 20 carbon atoms which contains at least one moiety represented by —CRf1Rf2X1, wherein X1 is iodine atom or bromine atom; Rf1 and Rf2 are the same or different and each is selected from fluorine atom or perfluoroalkyl groups having 1 to 5 carbon atoms and (ii) a step for forming a thin film on a substrate surface by using vinylidene fluoride homopolymer which comprises crystal form I alone or as main component and is obtained from the green powder product of vinylidene fluoride homopolymer comprising crystal form I alone or as main component.
摘要:
There is provided a method of forming a thin film of vinylidene fluoride homopolymer having crystal form I which is applicable to various substrates in relatively easy way (coating conditions, application method, etc.), a process for preparing a vinylidene fluoride homopolymer having crystal form I efficiently at high purity, and novel vinylidene fluoride homopolymers which can give a thin film being excellent in ferroelectricity. The method of forming a thin film of vinylidene fluoride homopolymer comprises (i) a step for preparing a green powder product of vinylidene fluoride homopolymer comprising crystal form I alone or as main component by subjecting vinylidene fluoride to radical polymerization in the presence of a bromine compound or iodine compound having 1 to 20 carbon atoms which contains at least one moiety represented by —CRf1Rf2X1, wherein X1 is iodine atom or bromine atom; Rf1 and Rf2 are the same or different and each is selected from fluorine atom or perfluoroalkyl groups having 1 to 5 carbon atoms and (ii) a step for forming a thin film on a substrate surface by using vinylidene fluoride homopolymer which comprises crystal form I alone or as main component and is obtained from the green powder product of vinylidene fluoride homopolymer comprising crystal form I alone or as main component.
摘要翻译:提供一种以相对容易的方式(涂布条件,涂布方法等)形成可以适用于各种基材的结晶形式I的偏二氟乙烯均聚物的薄膜的方法,制备具有结晶形式的偏二氟乙烯均聚物 我高效率地得到高纯度的新型偏二氟乙烯均聚物,可以得到铁电性优异的薄膜。 形成偏氟乙烯均聚物薄膜的方法包括(i)通过在溴化合物的存在下使偏二氟乙烯进行自由基聚合,制备单晶或单体晶形的偏二氟乙烯均聚物的生粉产物的步骤 或含有至少一个由-CR f 1 R f 2 X 1表示的部分的碳原子数为1〜20的碘化合物,其中X1为碘原子或溴原子; Rf1和Rf2相同或不同,分别选自具有1〜5个碳原子的氟原子或全氟烷基,(ii)通过使用仅含有晶型I的偏二氟乙烯均聚物在基板表面上形成薄膜的步骤 或作为主要成分,并且由包含单晶晶体I或主要成分的偏二氟乙烯均聚物的绿色粉末产品获得。