Abstract:
본발명은폴리아릴렌계중합체, 이의제조방법및 이를이용한연료전지용고분자전해질막에관한것이다. 본발명에따른폴리아릴렌계중합체는친수부의측쇄길이가길면서도술폰산기가특정부분에다중으로치환되어밀집되도록설계된고분자로서, 고분자막 형성시이온채널형성을좋게함과동시에, 특히중합체의주쇄가산소연결부(-O-)가아닌탄소-탄소직접결합에의해형성되어친수부의화학적안정성및 수분에대한우수한치수안정성을확보할수 있다. 또한, 본발명의제조방법에따라보다단순화된방법으로상기중합체를제조할수 있고, 상기중합체를이용하여제조된고분자전해질막은수분함량이낮은환경에서도높은수소이온전도도를나타낼뿐만아니라수분에장시간노출되어도높은치수안정성을나타내는등 연료전지용고분자전해질막으로서의성능이우수하고, 특히장기내구성이우수한전해질막을제공할수 있다.
Abstract:
본 발명은 양성자 전도성 고분자 및 이의 용도에 관한 것으로서, 보다 상세하게는, 다중 나프틸기를 포함하는 단량체로부터 형성되고, 반복단위의 측쇄에 다수의 산성기를 포함하는 탄화수소계 양성자 전도성 고분자, 상기 고분자를 포함하는 전해질 막, 상기 전해질 막을 포함하는 막-전극 접합체, 상기 막-전극 접합체를 포함하는 연료 전지에 관한 것이다.
Abstract:
PURPOSE: A polyarylene-based polymer is provided to have high hydrogen ion conductivity, to have excellent chemical stability and dimensional stability, and to especially manufacture a fuel cell with excellent long term durability. CONSTITUTION: A polyarylene-based polymer comprises a repeating unit indicated in chemical formula 1. In chemical formula 1, each of R^1-R^4 is independently -H, -SO3R, -PO(OH)2, -F, -CN, a C1~20 alkyl group, C1~20 alkoxy group, C6~18 aryl group, or C1~20 acyl group, where R of -SO3R is hydrogen, a C1-20 alkyl group, C1-20 alkoxy group, C6-18 aryl group or C1-20 acyl group, each of k is independently an integer from 1-5, n is an integer from 1-99. The weight average molecular weight of the polyarylene-based polymer is 10,000-1,000,000.
Abstract:
PURPOSE: A polymer electrolyte membrane for fuel cell is provided to have the low permeability of fuel gas, the high conductivity of hydrogen ion, the excellent durability of a membrane, and excellent membrane-electrode interface stability thereby obtaining long time stability of membrane-electrode assembly. CONSTITUTION: A polymer electrolyte membrane for fuel cell comprises: a poly(arylene ether) copolymer in the chemical formula 1; and a polymer consisting of one or more kind of monomers selected from the group consisting of vinylidene fluoride, trifluoroethylene, tetrafluoroethylene and hexafluoropropylene. The poly(arylene ether) copolymer is a random copolymer or a block copolymer.
Abstract:
PURPOSE: A polymer electrolyte membrane for a fuel cell is provided to ensure high dimensional stability even if the polymer electrolyte membrane is exposed for a long time and excellent membrane/electrode interface stability. CONSTITUTION: A polymer electrolyte membrane for a fuel cell comprises (a) a poly(aryleneether) copolymer of chemical formula 1 and (b) a polymer including at least one selected from the group consisting of vinylidene fluoride, trifluoroethylene, tetrafluoroethylene, and hexafluoropropylene. The average molecular weight of the poly(aryleneether) copolymer is 10,000-1,000,000.
Abstract:
PURPOSE: A cutting device for a masking tape is provided to achieve improved workability by allowing the height of the cutting device to be adjusted in accordance with the height of the worker. CONSTITUTION: A cutting device comprises a roller(11) wound with a masking tape(10); a support bar(12) for supporting the roller, which has an adjustable height; and a cutter knife(16) supported by the support bar and disposed in front of the roller; a cutter knife support bar(17) for supporting the cutter knife; a support member(15) interposed between the roller and the cutter knife, which prevents the masking tape from being deflected; and a safety cover(18) for covering the blade of the cutter knife. The support bar has a height adjustable by a clamp(14), and the cutter knife is arranged to be replaceable.