Abstract:
본 발명은 내재적 기공성 고분자를 포함하는 다공성 고분자 입자 또는 다공성 고분자 섬유가 탄화된 입자 또는 섬유 형상의 다공성 탄소 구조체 및 이를 제조하는 방법에 관한 것으로, 본 발명에 따른 다공성 탄소 구조체는 높은 표면적 및 우수한 전기전도도 특성을 나타냄으로써, 연료전지, 촉매 담지체 등에 유용하게 사용될 수 있다.
Abstract:
The present invention relates to a compound having a trifluorovinyl ether group, a polyimide copolymer comprising the same, a preparation method thereof and optical films or a display substrate using the same, and a polyimide copolymer comprising a trifluorovinyl ether group whereby, according to the present invention, maintains optical properties and has significantly improved chemical resistance due to the properties of a cross-linked structure of an aromatic polyimide, thereby being useful in various kinds of optical films and display substrates.
Abstract:
본 발명은 코어-쉘 구조를 갖는 폴리이미드-나노입자의 제조방법, 이를 이용한 코어-쉘 구조를 갖는 폴리이미드-나노입자 및 코어-쉘 구조를 갖는 폴리이미드-나노입자의 복합체에 관한 것이다. 보다 구체적으로는 별도의 표면처리를 하지 않은 입자의 표면에 폴리이미드 코팅층을 형성함에 있어서, 밀도분리법을 통한 코팅되지 않고 잔류하는 폴리아믹산의 제거를 용이 하게함으로써, 폴리이미드 코팅층이 수 나노미터의 일정한 두께로 형성되고, 코팅 밀도가 조밀하게 형성되어 고분자 매트릭스에 우수한 분산성을 보이며 유전특성 및 절연특성이 우수하게 향상되는 장점이 있다.
Abstract:
PURPOSE: An aromatic polyimide-based resin has improved chemical resistance by introducing an allyl group or a vinyl group into a polyimide basic frame structure, maintains excellent thermal resistance, and improves the thermal shrinkage or expansion ratio. CONSTITUTION: An aromatic polyimide-based resin is represented by chemical formula 1. A manufacturing method of the aromatic polyimide-based resin comprises a step of manufacturing an allyl group or a vinyl group side chain-containing polyamic acid resin represented by chemical formula 2 by polycondensating an allyl group or a vinyl group-containing diamine compound represented by chemical formula 3 or the mixture of the diamine compound and a diamine monomer represented by chemical formula 4 with an acid dianhydride; and a step of manufacturing the aromatic polyimide-based resin crosslinked and imidized by the aryl group or vinyl group side chain by heating and curing the polyamic acid resin.
Abstract:
PURPOSE: A method of manufacturing polymer-nanoparticle is provided to form a polymer coating layer on nanoparticles without a separate surface process and to easily remove non-reacted polymers by using amphiphilic ionic liquid and to uniformly form polymer coating layers in nanometer thickness units. CONSTITUTION: A method of manufacturing polymer-nanoparticle comprises the following step: phase separating coated nanoparticles and polymer solution from slurry by adding suspension which includes the polymer solution and nanoparticles to amphiphilic ionic liquid. The slurry comprises 15-75 volume% of polymer solution and 25-85 volume% of nanoparticles or 5-50 wt% of the polymer solution and 50-95wt% of nanoparticles. The polymer solution is one kind or two kinds selected from polyamic acid, polyether imide, polysulfone or ion conductive copolymer. The nanoparticles are inorganic particles or metal particles. The ionic solution is a compound including one or more anions selected from cation represented by chemical formula 1, or PF6-, BF4-, sbF6-, CF3SO3-, CH3SO4- and C2H5SO4.