Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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A Study on the Mechanical and Rheological Properties of the Recycled Polyethylene Composites with Ground Waste Tire Powder

재생 폴리에틸렌/폐타이어 분말 복합체의 기계적 특성 및 유변학적 특성에 관한 연구

  • Kye, H. (Department of Applied Chemical Engineering, The Mokwon University) ;
  • Shin, K. (Department of Polymer Engineering, Chungju Notional University) ;
  • Bang, D. (Department of Polymer Science & Engineering, Kumoh National Institute of Technology)
  • 계형산 (목원대학교 응용화학공학과) ;
  • 신경철 (충주대학교 고분자공학과) ;
  • 방대석 (금오공과대학교 고분자공학전공)
  • Published : 2006.06.30
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Abstract

The recycled polyethylene composites with various ratio of ground waste tire powder were manufactured by using a fully intermeshing co-rotating twin screw extruder for the reuse of waste tire scrap. In this investigation, the ground waste tire powders (GWTP) were blended with virgin HDPE and recycled polyethylene in the weight ratio of 0 to 50 wt.%. Mechanical properties such as tensile strength, elongation at break and impact strength were measured by using ASTM standard. The experimental results for the various composite showed that the tensile strength of composites decreased with increasing GWTP ratio, while elongation at break increased with the amounts of GWTP. On the other hand, the impact strength for the three kinds of composites showed maximum at the 30 wt.% of GWTP and then decreased. Morphology of the fracture surface tends to be rough with increasing waste tire powder content. Rheological properties were investigated by measuring the shear viscosity against shear rates and softening temperatures. They showed that melt viscosity of rubber composites in this study subsequently increased with increasing GWTP content as a result of increase of flow resistance against external stress and followed a Power-law behavior.

폐타이어와 폐수지 처리 문제를 해결하기 위한 방법으로 재생 폴리에틸렌 수지와 신재HDPE를 폐타이어 분말(GWTP)과 치합형 동방향 회전 이축 압출기(Fuly Intermeshing Co-rotating Twin Screw Extruder)를 이용하여 각 조성별로 용융 훈련하여 재생 PE/폐타이어 복합체를 제조하였다. 본 연구에서는 플라스틱 수지 (재생 PE, HDPE)와 폐타이어 분말의 혼합비를 $0\sim50$wt.%로 하였으며, ASTM에 의거하여 인장강도, 파단신율, 충격강도 등의 물성 변화를 확인하였다. 폐타이어 분말 함량이 증가할수록 인장강도가 감소하고 파단신율이 증가하였다. 한편 충격강도는 폐타이어 분말 함량이 30 wt.%일 때 최대이고, 함량이 증가할수록 충격 강도가 감소하는 경향을 나타내었다. 형태학적 고찰에서는 폐타이어 분말의 함량의 증가함에 따라 파단면이 거칠어지는 형상을 관찰하였다. 모세관점도계(Capillary Rheometer)를 이용하여 재생 PE/폐타이어 분말 복합체의 전단속도의 변화에 따른 용융전단점도의 변화와 연화점 (Ts) 등의 유변학적 성질을 분석한 결과, 폐타이어 분말 함량 증가에 따라 외부 응력에 대한 흐름 저항성을 증가시켜 용융점도가 상승하는 결과를 보였으며 측정된 전단율에서 전단 점도는 Power-law 거동을 보였다.

Keywords

References

  1. T. S. Hwang and J. W. Park, 'Preparation of Composite with Reinforced Tire Waste Chip and Effect of Various Matrices on Mechanical Properties', Korean Solid Wastes Engineering Society, 17(3), 305 (2000)
  2. T. S. Hwang, S. G. Lee, and K. S. Cha, 'Fabrication and Mechanical Properties of the Hybrid Composites Filled with Waste Stone and Tire Powders', Polymer (Korea), 25(6), 774 (2001)
  3. KOTMA Journal, 'Achievements of Waste Tire Recycling on 2004 and its Plan on 2005', 39(1), 64 (2005)
  4. J. K. Kim, 'Recycling Technologies for Scrap Waste Tires', Elastomer, 28(3), 205 (1993)
  5. J. L. Park, C. H. Cho, and S. K. Lee, 'A Study on GRT/HDPE Composite for Reuse of Waste Tire (I)', Korean Solid Wastes Engineering Society, 13(6), 699 (1996)
  6. J. K. Kim, H. N. Cho, and S. K. Lee, 'Effect of the Binder Content on the Recycling of Scrap Waste Tires', Journal of the Korea Institute of Rubber Industry, 29(5), 431 (1994)
  7. R. K. Mantan, 'Rubber Engineering', ed. by Indian Rubber Institute, p. 821, McGraw-Hill, 1998
  8. C. Sirisinha, P. Sae-oui, J. Guaysomboom, 'Mechanical Properties, Oil Resistance, and Thermal Aging Properties in Chlorinated Polyethylene/Natural Rubber Blends', Journal of Applied Polymer Science, 84, 22 (2002) https://doi.org/10.1002/app.10171
  9. C. Keith Riew, 'Rubber-Toughened Plastics', ed. by American Chemical Society, p. 225, 1989
  10. P. Rajalingam and W. E. Baker, 'The Role of Functional Polymers in Ground Rubber Tire-Polyethylene Composite', Rubber Chemistry & Technology, 65, 908 (1992) https://doi.org/10.5254/1.3538650
  11. J. S. Kim, S. J. Kim, K. C. An, S. Lim, D. H. Kim, and C. Han, 'The Effect of Additives in Waste Tire/Plastic Composites Using Internal Mixer', Polymer (Korea), 27(6), 562 (2003)
  12. S. C. Kim, 'Polymer Engineering I', pp. 304-309, Scitech Media, 1994
  13. S. C. Kim, 'Polymer Engineering II', pp. 247-293, Scitech Media, 1997
  14. T. W. Yoo, B. H. Park, and C. H. Choi, 'Development of Thermoplastic Polyolefins for Bumper Cover: 2. Effect of Rubber Viscosity', Polymer (Korea), 20(5), 805 (1996) https://doi.org/10.1016/0032-3861(79)90114-9