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폴리케톤 섬유/EPDM 고무의 접착특성에 미치는 폴리도파민 처리의 영향
진다영,박도운,원종성,이승구,Jin, Da Young,Park, Do Un,Won, Jong Sung,Lee, Seung Goo 한국섬유공학회 2015 한국섬유공학회지 Vol.52 No.6
Polyketone fiber can be used for reinforcing mechanical rubber goods (MRG) such as hoses, tire cords, protective gloves, and ropes. However, the reactivity of the surface of polyketone fibers decreases with a high crystallization of the polyketone fiber. Hence, modification of the surface of polyketone fiber is essential for improving the surface functionality and the fiber-matrix interfacial adhesion. In this study, dopamine treatment has been employed for modifying the polyketone fiber surface in order to improve the adhesion between polyketone fiber and ethylene propylene diene monomer (EPDM) rubber. Chemical composition of the modified fiber surface was examined using energy dispersive spectroscopy (EDS), attenuated total reflectance-infrared spectroscopy ((ATR)-IR), and X-ray photoelectron spectroscopy (XPS). Adhesion properties with the rubber were examined by an H-adhesion test. Surface energy and surface morphology were evaluated using contact angle and scanning electron microscopic (SEM) measurements, respectively. A polydopamine layer was formed on the polyketone fiber surface after dopamine treatment, thereby changing the surface energy via the oxidation polymerization of dopamine.
Primer 처리에 의한 폴리케톤 섬유/천연고무 복합재료의 계면접착 및 내피로성
원종성,진다영,손한글,홍영기,이승구,Won, Jong Sung,Jin, Da Young,Son, Han Geul,Hong, Young Ki,Lee, Seung Goo 한국섬유공학회 2014 한국섬유공학회지 Vol.51 No.2
Cords have commonly been used as reinforcing materials in rubber composites. To improve cord/rubber interfacial adhesion, the cords are usually coated with an adhesive (typically based on Resorcinol-Formaldehyde-Latex(RFL)). These cord/rubber composites have been used in many sectors such as the tire, hose and belt industries. Interfacial adhesion between cord and rubber is an important determinant of the durability of the composite system. In this study, newly developed polyketone cord was coated by dipping in various RFL-based adhesive primers and then bonded to natural rubber by a compression molding method. The resin/latex ratio in the RFL adhesive primer was varied in order to achieve the optimal mixing ratio. Polyketone cord was treated with primers at various heating temperatures and dipping times. To measure the adhesion strength between the polyketone cord and the natural rubber, and the fatigue resistance of the composite system, the H-test and the tension-compression test were performed. The surface of the polyketone cord treated with primer was examined by attenuated total reflectance (ATR) spectroscopy and other instrumental techniques.
커플링제 처리가 폴리케톤 섬유와 실리콘 고무의 계면접착에 미치는 영향
원종성,진다영,이지은,이승구,Won, Jong Sung,Jin, Da Young,Lee, Ji Eun,Lee, Seung Goo 한국섬유공학회 2015 한국섬유공학회지 Vol.52 No.1
Polyketone fiber, a newly developed super fiber, has a tenacity and modulus similar to the p-aramid fiber, and can be used for reinforcing mechanical rubber goods (MRG), such as tires, hoses, and protective gloves. However, the typical interfacial interaction between the polyketone fiber and the polymer matrix is relatively weak, such that the inclusion of polyketone fibers could create defects in the composites, which can easily result in failure. Therefore, it is necessary to modify fiber surfaces to improve wettability for optimization of the fiber-matrix interfacial bonding. In this study, the interfacial adhesion between polyketone fibers and a silicone rubber matrix was enhanced by surface treatments using coupling agents to modify the surface morphological and chemical properties of the polyketone fibers. The effects of coupling agent treatments on the surface of the fiber and interfacial adhesion of the Polyketone/Silicone rubber composites were characterized using dynamic contact angle analysis and X-ray photoelectron spectroscopy (XPS). Morphological changes were observed, by varying the coupling agent content, using a scanning electron microscope (SEM).