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Effect of pMDI as Coupling Agent on The Properties of Microfibrillated Cellulose-reinforced PBS Nanocomposite

pMDI 커플링제가 마이크로피브릴 셀룰로오스 강화 PBS 나노복합재료의 성질에 미치는 영향

  • Jang, Jae-Hyuk (College of Forest & Environmental Sciences, Kangwon National University) ;
  • Lee, Seung-Hwan (College of Forest & Environmental Sciences, Kangwon National University) ;
  • Kim, Nam-Hun (College of Forest & Environmental Sciences, Kangwon National University)
  • 장재혁 (강원대학교 산림환경과학대학) ;
  • 이승환 (강원대학교 산림환경과학대학) ;
  • 김남훈 (강원대학교 산림환경과학대학)
  • Received : 2014.04.30
  • Accepted : 2014.05.27
  • Published : 2014.07.25

Abstract

The effect of microfibrillated cellulose (MFC) content and coupling agent (polymeric methylene diphenyl diisocyanate, pMDI) on the properties of MFC-reinforced polybutylene succinate (PBS) nanocomposite. With increasing MFC content, tensile strength and elastic modulus were increased. More than 1.5 times in tensile strength of PBS/MFC(70/30) nanocomposite was improved by the addition of pMDI (1 phr), compared to the nanocomposite without pMDI. This trend was being significant in nanocomposite with higher MFC content. Thermal stability of the nanocomposite was increased by the addition of pMDI. These improvements is considered to be due to the improvement of MFC dispersion and interfacial adhesion between MFC and PBS matrix.

마이크로피브릴 셀룰로오스(MFC) 강화 polybutylene succinate (PBS) 나노복합재료의 성질에 미치는 MFC 첨가량 및 커플링제로서 polymeric methylene diphenyl diisocyanate (pMDI)의 첨가 영향을 조사하였다. 나노복합재료의 인장강도 및 탄성율은 MFC의 첨가량이 증가함에 따라 향상되었다. 또한 pMDI 첨가에 의하여 인장강도 및 탄성율은 증가하였으며, MFC첨가량이 증가하면서 그 경향이 더욱 뚜렷하였다. PBS/MFC (70/30) 복합재료에서는 인장강도가 pMDI(1 중량부)의 첨가에 의하여 약 1.5배 이상 향상되었다. 이러한 향상은 pMDI 첨가에 의한 MFC의 분산성 및 메트릭스 고분자와의 계면접착성 향상에 기인하며, 전자현미경을 이용한 파단면 관찰로 확인하였다. 또한, pMDI 첨가에 의하여 나노복합재료의 열적 안정성도 향상되었다.

Acknowledgement

Supported by : 한국연구재단

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