Abstract:
The present invention relates to a polypropylene carbonate composite manufactured by adding maleic anhydride graft acrylonitrile-styrene copolymer to the blend of polypropylene carbonate, which is synthesized using carbon dioxide, and polymethyl methacrylate. The polypropylene carbonate composite according to the present invention can be applied to molded products requiring impact resistance, high tensile force, etc., can be manufactured at low costs, and is eco-friendly as the polypropylene carbonate composite has increased tensile strength, excellent dispersibility and excellent thermal stability while maintaining the characteristics of polypropylene carbonate with flexibility and excellent processability.
Abstract:
본 발명은 고분자/탄소나노튜브 복합체의 제조방법 및 이를 이용하여 제조된 고분자/탄소나노튜브 복합체에 관한 것으로서, 제 1고분자 수지와 탄소나노튜브를 용매에 용해시키고 초음파 처리하여 예비복합체를 제조하는 단계 및 상기 예비복합체와 제 2고분자 수지를 압출기에서 혼합하는 단계를 포함하는 고분자/탄소나노튜브 복합체의 제조방법을 제공한다. 본 발명에 따른 폴리카보네이트/탄소나노튜브 복합체는 예비복합체의 제조단계에서 고분자 수지에 탄소나노튜브가 균일하게 분산되므로, 최종적으로 제조된 고분자/탄소나노튜브 복합체에서 탄소나노튜브의 분산도가 우수하다. 본 발명에서는 복합체에 포함되는 탄소나노튜브의 분산을 위하여 산처리를 하지 않으므로 탄소나노튜브의 표면 손상이 발생하지 않는 유리한 효과를 가지며, 탄소나노튜브의 높은 분산도로 인하여 전기전도도가 높고 전자파 차폐효과가 큰 복합체를 제조할 수 있다. 또한 동방향 이축압출기를 이용하여 용융 혼합하는 고분자 수지에 탄소나노튜브를 혼합하므로 탄소나노튜브의 함량을 용이하게 조절할 수 있고, 공정성 및 생산성이 우수한 폴리카보네이트/탄소나노튜브 복합체의 제조가 가능하다.
Abstract:
PURPOSE: A method for preparing polyisocyanurate foam using a liquid nucleating agent and polyisocyanurate foam prepared by the same are provided to reduce the size of foamed cell using a liquid nucleating agent while using a foaming agent and to improve compressive strength and flexural strength. CONSTITUTION: A method for preparing polyisocyanurate foam comprises a step of polymerizing a polyol-based compound and an isocyanate-based compound. A liquid silane compound is used as a nucleating agent for form formation. The content of the liquid silane compound is 0.5 ~ 10 parts by weight based on 100 parts by weight of the polyol-based compound.
Abstract:
PURPOSE: A composition for a separator for a fuel cell, a manufacturing method thereof, the separator for the fuel cell including thereof, and the fuel cell are provided to reduce the cost, facilitate the manufacturing process, and reduce the weight of the separator. CONSTITUTION: A composition for a separator for a fuel cell contains a polymer including 10~70wt% of first conductive additive, and 0.1~10wt% of second conductive additive. A manufacturing method of the composition comprises the following steps: mixing the conductive additives; stirring the mixture; and compression-molding the mixture.
Abstract:
A clay-dispersed nanocomposite is provided to ensure sufficient foliation and dispersion of clay, thereby realizing excellent mechanical properties, heat resistance and processability. A clay-dispersed nanocomposite comprises clay surface modified with a polymer resin containing an acrylonitrile-butadiene-styrene(ABS) copolymer as a continuous phase and polycarbonate as a disperse phase, and a quaternary ammonium salt containing an aromatic functional group. The aromatic functional group includes phenyl. The clay includes montmorillonite. The clay is used in an amount of 1-5 parts by weight based on 100 parts by weight of the polymer resin.
Abstract:
A method for preparing a polyurethane foam/clay nanocomposite insulating material, and a polyurethane foam/clay nanocomposite insulating material prepared by the method are provided to improve heat insulation and compressive strength. A method for preparing a polyurethane foam/clay nanocomposite insulating material comprises the steps of reacting a silane-based coupling agent and an organic clay to form a covalent bond between the silane-based coupling agent and the organic clay; mixing the obtained one with a diisocyanate compound to react them, thereby forming a covalent between the diisocyanate compound and the silane-based coupling agent and dispersing the organic clay in the diisocyanate compound; and mixing the obtained one with a polyol and a chlorine-based foaming agent and reacting it with stirring.