Abstract:
A method of exchanging or transforming end groups in a polyvinylidene fluoride-trifluoroethylene (PVDF-TrFE) co-polymer and thereby improving the ferroelectric properties of a PVDF-TrFE co-polymer is disclosed. A bulky or chemically dissimilar end group, such as an iodine or hydroxyl end group, may be transformed to a hydrogen, fluorine or chlorine atom. A PVDF-TrFE co-polymer comprising end groups or substituents selected from hydrogen, fluorine or chlorine is also disclosed. The co-polymer may be used as a ferroelectric, electromechanical, piezoelectric or dielectric material in an electronic device.
Abstract:
본 발명은 비플루오르화 용융 가공성 중합체의 가공조제 및 가공조제용 마스터배치에 관한 것으로서, 직경이 0.02㎛ ~ 0.5㎛ 인 플루오로 중합체 1차 입자가 모여서 입자 크기 2㎛ ~ 2㎜ 인 클러스터형의 2차 입자를 형성하는 플루오로 중합체를 포함하는 것을 기술적 특징으로 하며, 계면활성제(interfacial agent)가 포함되어 있지 않음에도 용융 파괴 소멸 시간을 단축시킬 수 있으며, 가공시 압출 부하가 적어 생산성을 향상시킬 수 있는 장점이 있다.
Abstract:
The invention pertains to a method for emulsion polymerization of at least one fluoromonomer, said method comprising: (i) providing at least one aqueous emulsion comprising at least one surfactant and a monomer mixture [mixture (M)] comprising at least one fluoromonomer [monomer (F)] and optionally at least one additional monomer, and at least one RAFT/MADIX agent; (ii) initiating the polymerization of said monomer mixture in said aqueous emulsion adding at least one radical initiator; (iii) continuing the polymerization by adding additional amounts of said mixture (M) and said RAFT/MADIX agent, until converting the targeted amount of said mixture (M), and (iv) terminating the polymerization and recovering a latex of fluoropolymer [polymer (F)]; wherein the amount of RAFT/MADIX agent is comprised between 0.1 and 0.5 % moles, with respect to the total amount of converted monomers of said monomer mixture, and wherein the amount of said RAFT/MADIX agent present in the aqueous emulsion when initiating the polymerization in step (ii) is of at most 50% with respect to the total amount of said RAFT/MADIX agent.
Abstract:
An article is provided that includes a polymer having a surface that has excellent heat resistance, weathering resistance, or the like and has a low coefficient of friction. Additionally, a method of manufacturing the article is provided. The article includes a polymer having a surface that has been plasma treated in flowing gas including at least one type of silicon-containing gas selected from the group consisting of tetramethylsilane, hexamethyldisiloxane, and hexamethyldisilazane. The polymer is selected from the group consisting of silicones and fluorocarbon polymers.
Abstract:
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.
Abstract:
In accordance with the present invention, aqueous emulsion polymerization processes of synthesizing 2,3,3,3-tetrafluoropropene/vinylidene fluoride copolymers having 2,3,3,3-tetrafluoropropene as the major monomer unit are provided.
Abstract:
A copolymer comprising trans-1,3,3,3-tetrafluoropropene units and vinylidene fluoride units, and methods of making the same. A method of preventing biofouling on an article of manufacture, comprising applying such copolymer to the article of manufacture. A process of preparing a surface having a surface energy of between about 20 and about 30 mJ/m2, comprising applying such a copolymer to a support. A method of preventing accumulation of ice on an article of manufacture, comprising applying such a copolymer to an article of manufacture. A method of preparing a polymer, comprising a step of adding trans -1,3,3,3-tetrafluoropropene/vinylidene fluoride copolymer as a polymer processing additive/aid to said polymer.
Abstract translation:包含反式-1,3,3,3-四氟丙烯单元和偏二氟乙烯单元的共聚物及其制备方法。 一种防止在制品上生物污损的方法,包括将这种共聚物应用于制品。 制备具有约20至约30mJ / m 2的表面能的表面的方法,包括将这样的共聚物施加到载体上。 一种防止在制品上积聚冰的方法,包括将这种共聚物应用于制品。 一种制备聚合物的方法,包括将反式-1,3,3,3-四氟丙烯/偏二氟乙烯共聚物作为聚合物加工添加剂/助剂添加到所述聚合物中的步骤。