Abstract:
PURPOSE: An optical recording device with improved recording stability is provided to introduce a trap layer to an optical recording element including a photorefractive polymer layer for securing the recording stability without decreasing the recording speed, the charge transfer speed in a bulk area of the photorefractive polymer. CONSTITUTION: An optical recording device with improved recording stability includes a polymer layer and a trap layer. The polymer layer includes a photoconductive polymer, a non-linear optical substance, a photoinitiator, and a plasticizer. The trap layer is coated on either or both surfaces of the polymer layer for trapping holes or electrons.
Abstract:
PURPOSE: A method for preparing a biodegradable block copolymer by using a random copolymer of caprolactone and lactide and polyether, and a drug delivery system and a support for preparation of artificial organs using the block copolymer prepared by the method are provided, to improve the biocompatibility by retarding the degradation velocity and reducing the crystallinity. CONSTITUTION: The method comprises the step of block copolymerizing a random copolymer of caprolactone and lactide and polyether. Preferably the ratio of caprolactone to lactide is 3:97 to 97:3 by weight; and the polyether has a molecular weight o 350-20,000 and comprises at least one selected from the group consisting of polyethylene glycol, polyethylene glycol monomethyl ether, polypropylene glycol and a block copolymer of ethylene glycol and propylene glycol.
Abstract:
PURPOSE: A method for preparing a lithium polymer secondary battery and a lithium polymer secondary battery prepared by the method are provided, to improve the stability of the interface between a lithium electrode and a polymer electrolyte. CONSTITUTION: The method comprises the steps of mixing a cross-linking agent and a monomer by the molar ratio of 1:1 to 1:11 and dissolving the mixture into a liquid electrolyte of 100-400 %(w/w) to obtain a polymer electrolyte; coating the polymer electrolyte on the one surface of a lithium electrode and treating it with heat or a UV ray to coating a lithium electrode with a polymer electrolyte; and adhering the coated electrode to a positive electrode. Preferably the cross-linking agent is selected from the group consisting of polyethylene glycol dimethacrylate, polyethylene glycol diacrylate, divinyl benzene, divinyl ether, polyester dimethacrylate, trimethyrolpropane, trimethyrolpropane trimethacrylate and their mixtures.
Abstract:
PURPOSE: Provided are a photorefractive polymer composition which has excellent photorefractivity and phase stability, and which shows easy processability, and a method for preparing the same. CONSTITUTION: The polymer composition consists of a photoconductive polymer for conducting the incident light; a linear, electrically optical(nonlinear optical) polymer for refracting an incident light; and an electric charge generator for generating an electric charge in responding to the incident light. The composition further comprises 40.00 wt% or less of plasticizer in order to increase a processability of mixture of the photoconductive polymer and the linear, electrically optical polymer into film. The contents of the photoconductive polymer, the linear polymer, and the generator are 5.00-95.00 wt%, 5.00-95.00 wt%, and 0.05-2.00 wt%, respectively.
Abstract:
본 발명은 이온 전도 특성과 기계적 물성이 우수하며, 간편한 제조 공정으로 쉽게 제조할 수 있는 고분자 전해질 조성물 및 제조방법에 관한 것으로, 보다 상세하게는 가교화된 폴리에틸렌 옥사이드를 주쇄로 하는 선형고분자와 에틸렌카보네이트, 프로필렌카보네이트, 디메틸카보네이트, 디에틸카보네이트, 메틸에틸카보네이트 또는 이들의 혼합물과 같은 유기용매 및 리튬퍼클로레이트, 리튬트리플레이트, 리튬헥사플로로포스페이트, 리튬테트라플로로보레이트, 리튬트리플로로메탄설포닐이미드와 같은 리튬염을 주성분으로 하는 가소화된 고분자 전해질 조성물 및 제조방법에 관한 것이다. 본 발명은 가교화된 폴리에틸렌 옥사이드를 주쇄로 하는 선형고분자와 유기용매 및 리튬염을 주성분으로 하는 고분자 전해질을 제공하는 것을 목적으로 한다.
Abstract:
본 발명은 다공성 고분자막내에 액체 전해질이 담지된 새로운 고분자 전해질 조성물 및 그 제조방법에 관한 것이다. 본 발명은 다공성 고분자막의 표면 및 미세공내부에 액체 전해질과의 상용성이 우수한 고분자를 얇게 코팅한 후 액체 전해질을 담지하여 제조한 새로운 고분자 전해질로써, 전해액의 새어나옴 현상이 없고 액체 전해질과 유사한 이온 전도특성을 나타내고 기계적 물성 및 전기화학적 안정성이 우수하며 리튬 고분자 이차전지용 고분자 전해질로 적용시에 충방전 특성이 우수하다.
Abstract:
PURPOSE: A polymer electrolyte composition in which liquid electrolyte is supported inside a porous polymer membrane and a method for manufacturing the same are provided to manufacture a polymer electrolyte by supporting the liquid electrolyte onto the porous polymer membrane after coating a polymer having superior compatibility with the liquid electrolyte to a thin thickness on the surface of a porous polymer membrane and inside micro pores. CONSTITUTION: The polymer electrolyte composition is characterized in that liquid electrolyte consisting of constituents (d) and (e) is infused into micro pores after coating the melted material on the surface of a porous polymer membrane and inside micro pores of constituents(a) after melting a polymer of constituents(b) having good affinity with the liquid electrolyte together with inorganic materials represented as constituents(c). The method for manufacturing the polymer electrolyte composition comprises the steps of drying the coated porous polymer membrane after dipping a porous polymer membrane into a solution in which polymer is dissolved together with inorganic materials using the above composition so as to coat the surface and inside the porous polymer membrane; drying again the coated membrane after coating the surface of the dried membrane with a solution in which polymer is dissolved with inorganic materials; and supporting the manufactured porous polymer membrane together with liquid electrolyte onto a mixed solvent under the atmosphere of argon.
Abstract:
본발명은광반응성이우수한폴리비닐시나메이트계고분자에우수한열적안정성을나타내는폴리이미드계고분자를블렌드한액정광배향막및 그의제조방법을제공한다. 본발명의폴리이미드와폴리비닐시나메이트의블렌드액정광배향막은폴리이미드의전구체인폴리아믹산과폴리비닐시나메이트를 1:9 내지 9:1의중량비로혼합하여 1-메틸-2-피롤리돈, 디메틸설폭사이드또는디메틸아세테이트등의유기용매에용해시킨다음, ITO 유리판에스핀코팅(spin coating)시킨후, 100 내지 300℃, 바람직하게는 150 내지 250℃의온도에서가열하여폴리아믹산의이미드화반응을유도시켜폴리이미드와폴리비닐시나메이트의블렌드필름을수득하고, 이렇게수득한블렌드필름에편광의 UV를조사하여, 블렌드필름에구조적인이방성을유도시킴으로써제조하였다. 본발명에의해서제조되는액정광배향막은액정디스플레이의제조시높은공정온도에서도견딜수 있으며, 장시간사용할때에도액정배향의성능저하를야기시키지않아장기적인액정배향의안정성을향상시키는데크게기여할것으로기대된다.