Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Relations between Physical Parameters and Improvement of Mechanical Properties in Jute Fiber Green Composites by Maleic Anhydride Coupler

Jute fiber Green Composite의 커플링제에 의한 물리적 인자의 변화와 기계적 특성 향상

  • 이정훈 (한국기계연구원 복합재료연구팀) ;
  • 변준형 (한국기계연구원 복합재료연구팀) ;
  • 김병선 (한국기계연구원 복합재료연구팀) ;
  • 박종만 (경상대학교 나노.신소재공학부 고분자공학) ;
  • 황병선 (한국기계연구원 복합재료연구팀)
  • Published : 2007.02.28
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Abstract

In order to improve the mechanical properties of jute fiber/polypropylene(PP) composites, the property change with the addition of a coupling agent, maleic anhydride polypropylene(MAPP) was examined experimentally. The maleated coupler acts as an intermediate to chemically connect the polar nature of the fiber and non-polar nature of the polyolefin polymer resin. Furthermore, the decrease in viscosity of the resin which results from the melting point reduction by the MAPP, leads to an increase of contact area with the fiber interface. We discussed the improvement of the PP composite blend of the maleated coupler with the 80mm jute long fiber mat in conjunction with the change of physical parameters in the thermoplastic resin. We confirmed the extent of contribution to the mechanical physical enhancement by using the following parameters: melting flow index(MI) and viscosity, contact angle, thickness of the composite, interfacial shear strength and morphology observation etc. Especially it was observed that the MI and viscosity, MAPP mixture had a very strong relationship with the tensile and flexural strength and modulus, and interfacial shear strength(IFSS).

Jute fiber Green Composite의 기계적 향상을 위한 계면특성을 향상시키기 위하여 커플링제를 도입하여 첨가량에 따른 특성변화를 실험적으로 규명하였다. Maleic anhydride grafted popolypropylene(MAPP)는 자연섬유와의 계면특성의 향상에서 물리화학적 역할을 하는 것으로 판단된다. MAPP에 의한 용융상태에서의 낮아진 수지의 점도는 흐름성이 향상되어 섬유의 계면과의 접촉 면적을 확대시킨다. 약 80mm의 jute 장섬유 mat에 maleated coupler가 혼합된 PP 복합재의 물성 향상과 열가소성수지의 물리적 변화와의 관계를 고찰하였다. 이 물리적 현상을 유동지수(MI: Melting flow index) 및 점도, contact angle, 복합재료 두께, 계면전단강도, morphology 분석 등의 인자들을 이용하여 기계적 물성 향상에 기여하는 정도를 확인하였다. 특히 유동지수(MI)와 점도, MAPP의 혼합량은, 전당강도(IFSS), 인장 및 굴곡 강도와 인장탄성률의 향상과 매우 관계가 있음을 실험 결과를 통하여 확인하였다.

Keywords

References

  1. O'Dell, J. L., 'Natural fibers in resin transfer molded composites,' Proceedings of the Fourth International Conference on Woodfiber-Plastic Composites, May 12-14, 1997, pp. 280-285 Madison, WI. U.S.A
  2. Bolton, A. J., 'Natural fibers for plastic reinforcement,' Mat. Tech., Vol. 9, No. 1/2, 1994, pp. 12-20
  3. Jian, J., Okubo, K., and Fujii, T., 'Fabrication of biodecomposable composites using natural fibers and their strength properties,' Proceedings of the 31st International SAMPE Technical Conference, Oct. 26-30, 1999, pp. 355-366, Long Beach, CA. U.S.A
  4. Van de Weyenberg, I., Ivens, J., De Coster, A., Kino, B., Baetens, E., and Verpoest, I., 'Influence of processing and chemical treatment of flax fibers on their composites,' Composite Sci. and Tech., Vol. 63, 2003, pp. 1241-1246 https://doi.org/10.1016/S0266-3538(03)00093-9
  5. Valadez-Gonzalez, A., Cervantes-Uc, J. M., Playo, R., and Herreta-Franco, P. J., 'Effect of fiber surface treatment on the fiber-matrix bond strength of natural fiber reinforced composites,' Composites: Part B, Vol. 30, 1999, pp. 309-320 https://doi.org/10.1016/S1359-8368(98)00054-7
  6. Augustine, P., Kuruvilla, J., and Sabu, T., 'Effect of surface treatments on the electrical Properties of low-density polyethylene composites reinforced with short sial fibers,' Composite Sci. and Tech., Vol. 57, 1997, pp. 67-79 https://doi.org/10.1016/S0266-3538(96)00109-1
  7. Kuruvilla, J., Sabu, T, and Pavithran, C., 'Effect of chemical treatment on the tensile properties of short sisal fiber-reinforced polyethylene composites,' Polymer, Vol. 37, No. 23, 1996, pp. 5139-5149 https://doi.org/10.1016/0032-3861(96)00144-9
  8. Belgacem, M. N., Batille, P., and Sapieha, S., 'Effect of corona modification on the mechanical properties of polypropylene/cellulose composites,' J. Appl. Ploym. Sci., Vol. 53, 1994, pp. 379-385 https://doi.org/10.1002/app.1994.070530401
  9. Snijder, M. H. and Bos, H., 'Reinforcement of polypropylene by annual pant fibers: optimization of the coupling agent efficiency,' Composite Interfaces, Vol. 7, No. 2, 2000, pp. 69-75 https://doi.org/10.1163/156855400300184235
  10. Felix J. M. and Gatenholm, P., 'The Nature of adhesion in composites of modified cellulose fibers and polypropylene,' J. Appl. Polym. Sci., Vol. 42, 1991, pp. 609-620 https://doi.org/10.1002/app.1991.070420307
  11. Lu, J. Z., Wu, Q., and Negulescu, I. I., 'The Influence of maleation on polymer absorption and fixation, wood surface wettability, and interfacial bonding strength in wood-PVC composites,' Wood and Fiber Science, Vol. 34, No.3, 2001, pp. 434-459
  12. Godavarti, S., 'Optimization of coupling agent characteristics for maximizing performance of wood fiber thermoplastic composites,' ANTEC 2003-Proceedings of the 61st Annual Technical Corference and Exhibition, Vol. XLIX, Nashville, TN, May 4-8, 2003, Society of Plastics Engineers, p. 2047
  13. Maldas D. and Kokta, B. V., 'Interfacial adhesion of lignocellulosic material in polymer composites: An overview,' Composite Interfaces, Vol. 1, No. 1, 1993, pp. 87-108 https://doi.org/10.1163/156855493X00338
  14. Keener, T. J., Stuart, R. K., and Brown, T. K., 'Maleated coupling agents for natural fiber composites,' Composites: Part A No. 25, 2004, pp. 357-362
  15. Camani, R., Krishnan, M., and Narayan, R., 'Bioflber-reinforced polypropylene composites,' Polymer Engineering and Science, Vol. 37, No.2., 1997, pp. 476-483 https://doi.org/10.1002/pen.11691
  16. Chun, I. and Woodhams, R. T, 'Use of Processing Aids and Coupling Agents in Mica-Reinforced Polypropylene,' Polym. Comp., Vol. 5, No.4, 1984, pp. 250-257 https://doi.org/10.1002/pc.750050404
  17. Dalvag, H., Klason, C., and Stronvall, H. E., 'The Efficiency of cellulosic fillers in common thermoplastics. Part II. Filling with processing aids and coupling agents,' Int. J. Polym. Mater., Vol. 11, 1985, pp. 9-38 https://doi.org/10.1080/00914038508078651
  18. Gatenholm, P. and Felix, J. M., 'Interphase design in cellulose fiber/polypropylene composite,' pp. 237-244, T. C. Chung, ed. New Advances in Polyolefins, Plenum Press, New York, NY, 1993
  19. Son T. Q., Park, J. M., and Hwang, B. S., 'Interfacial evaluation of modified jute and hemp fibers/polypropylenemaleic anhydride polypropylene copolymers (MAPP) composites using micromechanical test and nondestructive acoustic emission,' The Korea Society for Composite Materials, Proceedings on Fall National Conference, Kyungpook National University, November 18, 2005, pp. 157-160
  20. Eastman Publication APG-6A EPOLENE maleated polyolefins Superior coupling additives for mica reinforcement, Eastman Chemical Co., March. 2003
  21. Technical data sheet publication APG-7, Eastman Chemical Co., Sep. 1997
  22. Maldas D. and Kokta B. V., 'Improving adhesion of wood fiber with polystyrene by the chemical treatment of fiber with a coupling agent and the influence on the mechanical properties of composites,' Adhesion Sci. Technol, Vol. 3, No.7, 1989, pp. 529-539 https://doi.org/10.1163/156856189X00380