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Poly(1-oxotrimethylene) Fibers Prepared by Different Draw Ratios for the Tire Cord Application
Cho, Hae-Souk,Chung, Jae-Seung,Shim, Jae-Yoon,Kim, Jin-Joo,Choi, Won-Jae,Lee, Jong-Chan 한국고분자학회 2012 Macromolecular Research Vol.20 No.7
Poly(1-oxotrimethylene) (POTE) was prepared by polymerization of ethylene and carbon monoxide gases in an autoclave using a palladium catalyst system. POTE fibers having different draw ratios were prepared and characterized using differential scanning calorimetry (DSC), X-ray diffraction, and a universal testing machine (UTM). Tensile strength and modulus of POTE fibers having a draw ratio of 16 obtained by drying at $220^{\circ}C$ were found to be 13.4 and 369.8 g/denier, respectively. These values are much larger than those of poly(ethylene terephthalate) (PET) and Nylon 6 fibers that are currently used as tire cords.
유리섬유 강화 폴리올레핀케톤 복합재료의 제조 및 특성에 대한 연구
조해석 ( Hae Souk Cho ),정재승 ( Jae Seung Chung ),백승조 ( Seung Jo Beak ),최원재 ( Won Jae Choi ),김진주 ( Jin Joo Kim ),윤성균 ( Sung Kyun Yoo ),이종찬 ( Jong Chan Lee ) 한국공업화학회 2012 공업화학 Vol.23 No.3
우수한 기계적 강도를 가지고 있는 폴리올레핀케톤 고분자를 합성하고, 우레탄과 아미노실란으로 표면 처리 된 유리 섬유를 도입하여 엔지니어링 플라스틱용 복합재료를 제조하였다. 유리섬유와 폴리올레핀케톤의 상용성을 확인하기 위해 주사 전자 현미경으로 복합재료의 파단면 형상을 확인하였고, 함유된 유리섬유의 크기와 양, 그리고 바인더의 종류에 따른 복합재료의 기계적 물성을 관찰하였다. 적절한 표면처리를 한 유리섬유로 강화된 폴리올레핀케톤 복합재 료는 좋은 계면 상용성을 보이며 향상된 기계적 강도를 가지고 엔지니어링 플라스틱 분야에서의 응용 가능성을 확인 할 수 있었다. Poly (olefin ketone) terpolymer having excellent mechanical properties was synthesized and composite materials of poly (olefin ketone) containing polyurethane/amino silane functionalized glass fibers were prepared. The compatibilities between the functionalized glass fiber and the polymer were characterized by observing the fracture surfaces of the composites using scanning electron microscopy (SEM). Mechanical properties of composites with different contents, diameters, lengths, and binders of glass fibers were also studied using universal testing machine (UTM). The introduction of suitably functionalized glass fiber into the poly (olefin ketone) produces composite materials having excellent mechanical properties and they are very promising alternative materials for the engineering plastic applications.
Characterization of WO3 Supported on TiO2-ZrO2 and Catalytic Activity for Acid Catalysis
Sohn, Jong Rack,Cho, Hae Souk,Kim, hae won 한국공업화학회 1999 Journal of Industrial and Engineering Chemistry Vol.5 No.1
Tungsten oxide supported on TiO₂ZrO₂ was prepared by drying powdered Ti(OH)₄,Zr(OH)₄ with ammonium metatungstate aqueous solution followed by calcining in air at high temperature. The characterization of prepared catalysts was performed using Fourier transform infrared (FTIR), Raman, X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) and by measuring surface area. The specific surface area and acidity of WO₃/50-TiO₂-ZrO₂ (500) increased in proportion to the tungsten oxide content up to 20 wt % due to the interaction between WO₃ and TiO₂ZrO₂. Since the TiO₂ZrO₂ stabilizes the tungsten oxide species, for the samples equal to or less than 20 wt %, tungsten oxide was well dispersed on the surface of TiO₂-ZrO₂, but for the samples above 20 wt % the triclinic phase of WO₃ was observed at any calcination temperature. The high acid strength and high acidity of WO₃/TiO₂-ZrO₂ were respon-sible for the W=O bond nature of complex formed by the interaction between WO₃ and TiO₂-ZrO₂. The catalytic activities of WO₃/TiO₂-ZrO₂ catalysts for cumene dealkylation were correlated to their acidity.