Article
  • Rheological Properties and Foaming Behaviors of Modified PP/Nano-filler Composites
  • Yoon KH, Lee JW, Kim YC
  • 개질 폴리프로필렌/나노필러 복합체의 유변학적 특성 및 발포거동
  • 윤경화, 이종원, 김연철
Abstract
Modified polypropylene (m-PP) was fabricated by furfuryl sulphide (FS) as branching agent and m-PP/nanofiller composites were prepared with silicate and multi-walled carbon nanotube (MWCNT), using a twin screw extruder. The chemical structures and thermal properties of the m-PP were investigated by FTIR and DSC. The chemical structure of the m-PP was confirmed by the existence of =C-H stretching peak of the branching agent at 3100 cm^(-1). There was no district change in melting temperature in case of m-PP, but a certain increase in crystallization temperature was notified and the increase was in the range of 10-20 ℃. The rheological properties, filler dispersion and foaming behaviors of the m-PP/nano-filler composites were investigated by dynamic rheometer, X-ray diffractometer (XRD) and scanning/transmission electron microscope (SEM/TEM). m-PP/nano-filler composites showed a high complex viscosity at a low frequency, an increase in melt elasticity, and a high shear thinning effect. Compared to pure PP, m-PP and m-PP/nano-filler composites were sufficient to enhance the foaming behavior.

이축압출기(twin screw extruder)를 이용하여 용융상태에서 furfuryl sulphide를 분지제로 개질 폴리프로필렌(modified polypropylene, m-PP)을 제조하고, 층상 실리케이트와 다중벽 탄소나노튜브(multi-walled carbon nano tube, MWCNT)와의 m-PP/나노필러 복합체를 제조하였다. m-PP의 화학구조와 열적 특성은 적외선분광기(FTIR), 시차주사열용량분석기(DSC)를 이용하여 관찰하였다. m-PP의 화학구조는 3100 cm^(-1)에서 나타나는 분지제의 =C-H 신축진동피크를 이용하여 확인하였고, 용융온도는 큰 변화를 보이지 않았지만 결정화온도는 10-20 ℃ 가량 증가하였다. m-PP/나노필러 복합체의 유변학적 특성과 분산성 및 발포거동은 동적유변측정기, X-선 회절분석기(XRD), 주사/투과전자현미경(SEM/TEM)을 이용하여 관찰하였다. m-PP/나노필러 복합체의 낮은 주파수 영역에서의 복합점도와 용융탄성이 증가하였으며, 전단담화(shear thinning) 효과 또한 증가하였다. 순수 PP와 비교할 때 m-PP와 m-PP/나노필러 복합체의 발포 거동 개선효과가 우수한 것을 확인하였다.

Keywords: modified polypropylene; nano-filler composite; rheological properties; foaming behaviors.

References
  • 1. Kim SJ, Yoo CS, Ha CS, Journal of Adhesion and Interface., 10, 23 (2009)
  •  
  • 2. Jung HW, Lee JS, Kim WN, Hyun JC, Korean J. Rheol., 8(2), 119 (1996)
  •  
  • 3. Li SZ, Xiao MM, Wei DF, Xiao HN, Hu FZ, Zheng AN, Polymer, 50(25), 6121 (2009)
  •  
  • 4. Li J, Zhou C, Gang W, Polym. Test., 22, 217 (2003)
  •  
  • 5. Istrate OM, Chen B, Soft Matter., 7, 1840 (2011)
  •  
  • 6. Yim YJ, Seo MK, Kim HY, Park SJ, Polym.(Korea), 36(4), 494 (2012)
  •  
  • 7. Lee SU, Oh IH, Lee JH, Choi KY, Lee SG, Polym.(Korea), 29(3), 271 (2005)
  •  
  • 8. Ko JH, Kim JC, Chang JH, Polym.(Korea), 33(4), 333 (2009)
  •  
  • 9. Yoon KH, Shin DY, Kim YC, Polym.(Korea), 36(2), 245 (2012)
  •  
  • 10. Borsig E, van Duin M, Gotsis AD, Picchioni F, Eur.Polym. J., 44, 200 (2008)
  •  
  • 11. Tsenoglou CJ, Gotsis AD, Macromolecules, 34(14), 4685 (2001)
  •  
  • 12. Lee BY, Dahal P, Kim HS, Yoo SY, Kim YC, Appl. Chem. Eng., 23(4), 388 (2012)
  •  
  • 13. Hong D, Yoon KJ, Lee KY, Polym.(Korea), 26(1), 61 (2002)
  •  
  • 14. Yu F, Zhang H, Liao R, Zheng H, Yu W, Zhou C, Eur.Polym. J., 45, 2110 (2009)
  •  
  • 15. Lonkar SP, Singh RP, Thermochim. Acta., 49, 63 (2009)
  •  
  • 16. Choi SJ, Yoon KH, Kim HS, Yoo SY, Kim YC, Polym.(Korea), 35(4), 356 (2011)
  •  
  • 17. Yamaguchi M, Wagner MH, Polymer, 47(10), 3629 (2006)
  •  
  • 18. Kim HJ, Lee JJ, Kim JC, Kim YC, J. Ind. Eng. Chem., 16(3), 406 (2010)
  •  
  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2013; 37(4): 494-499

    Published online Jul 25, 2013

  • Received on Feb 15, 2013
  • Accepted on Mar 11, 2013