Polypropylene Nanocomposites with Graphene Oxide Containing Flame Retardant Moieties

국문 초록 (Abstract)

폴리프로필렌(polypropylene, PP)/산화그래핀(graphene oxide, GO) 복합재료의 난연성과 기계적 성질을 향상시키기 위해 GO를 인계 난연제로 개질시켰다. 복합재료는 무수말레인산이 수식된 PP(maleic anhydride-grafted PP, MAPP)를 상용화제로 사용하여 용융 혼합 방식으로 제작되었다. 푸리에 적외선 분광학(Fourier transform infrared, FTIR), 광전자분광법(X-ray photoelectron spectroscopy, XPS)을 통해 난연제와 GO 사이에 공유 결합이 형성된 것을 확인할 수 있었다. GO의 기능화와 상용화제 사용이 PP/GO 복합재료의 형태학, 난연성, 기계적 성질에 미치는 영향을 평가하였다. 주사전자현미경(SEM)을 이용한 형태학 분석 결과, MAPP를 첨가함으로써 충전제와 기지재 사이의 계면 상호작용이 증가되어 GO의 박리 및 분산성이 향상되었다. PP/기능화된 GO 복합재료의 한계산소지수, 영 탄성률, 인장 강도가 PP/GO 복합재료에 비해 증가된 결과를 나타냈다.

다국어 초록 (Multilingual Abstract)

Graphene oxide (GO) was functionalized with phosphorus-containing groups to give the flame retardancy to the polypropylene (PP)/GO nanocomposites. The composites were prepared via melt mixing with maleic anhydride-grafted PP (MAPP) as a compatibilizer. Through the Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS), covalently-bonded flame retardant moieties on GO were characterized. The effect of the functionalization of GO and the use of compatibilizer on the morphology, flame retardancy, and mechanical properties of the PP/GO composites were investigated. SEM observation of the composites showed that the addition of MAPP improved the exfoliation and dispersion state of the GO sheets by improving the interfacial interaction between the filler and the matrix. For PP/functionalized GO composites, the limiting oxygen index (LOI), Young’s modulus, and tensile strength were increased compared with PP/GO composites.

목차 (Table of Contents)

• 초록
• Abstract
• Introduction
• Experimental
• Results and Discussion
• Conclusions
• References

참고문헌 (Reference)

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