Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Study on the Morphology of the PC/ABS Blend by High Shear Rate Processing

PC/ABS 블렌드의 고속전단성형에 따른 모폴로지 변화에 관한 연구

  • Lee, Dong Uk (Department of Polymer Materials Research Team, Automotive Research & Development, Hyundai Motor Group) ;
  • Yong, Da Kyoung (Department of Advanced Organic Materials & Textile System Engineering, Chungnam National University) ;
  • Lee, Han Ki (Department of Polymer Materials Research Team, Automotive Research & Development, Hyundai Motor Group) ;
  • Choi, Seok Jin (New Technology Development Team, Research & Development Division, Hyundai-ngv) ;
  • Yoo, Jae Jung (Department of Advanced Organic Materials & Textile System Engineering, Chungnam National University) ;
  • Lee, Hyung Il (Department of Advanced Polymer Engineering, Chungnam National University) ;
  • Kim, Seon-Hong (Department of Advanced Polymer Engineering, Chungnam National University) ;
  • Lee, Kee Yoon (Department of Advanced Polymer Engineering, Chungnam National University) ;
  • Lee, Seung Goo (Department of Advanced Organic Materials & Textile System Engineering, Chungnam National University)
  • 이동욱 (HYUNDAI MOTOR GROUP, 자동차부문 연구개발본부, 고분자재료연구팀) ;
  • 용다경 (충남대학교 유기소재.섬유시스템공학과) ;
  • 이한기 (HYUNDAI MOTOR GROUP, 자동차부문 연구개발본부, 고분자재료연구팀) ;
  • 최석진 ((주)현대엔지비, 기술개발팀) ;
  • 유재정 (충남대학교 유기소재.섬유시스템공학과) ;
  • 이형일 (충남대학교 고분자공학과) ;
  • 김선홍 (충남대학교 고분자공학과) ;
  • 이기윤 (충남대학교 고분자공학과) ;
  • 이승구 (충남대학교 유기소재.섬유시스템공학과)
  • Received : 2013.12.23
  • Accepted : 2014.03.04
  • Published : 2014.06.01
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Abstract

The PC/ABS blends were manufactured with high shear rate processing. Changes of the blend morphology were analyzed according to the screw speed and processing time. To find optimal conditions of the high shear rate processing of the PC/ABS blend, blend morphology and size of the dispersed phase, ABS, were observed with a SEM. Also, tensile properties of the PC/ABS blends were measured to investigate the effect of the high shear rate process with the screw speed of 500 rpm to 3000 rpm for processing times of 10s to 40s. Especially, to observe the dispersed phase of the PC/ABS blend clearly, fracture surfaces of the PC/ABS blend were etched with chromic acid solution. As screw speed and processing time increase, dispersed phase size of the PC/ABS blend decreases and mechanical properties of the blend decrease as well. Especially, at screw speed over than 1000 rpm of high shear rate processing, mechanical properties of the PC/ABS blends decrease drastically due to the degradation of the blend during the high shear rate processing. Consequently, the optimal condition of screw speed of the high shear processing of the PC/ABS blend is set at 1000rpm, in this study. Under optimal condition, the PC/ABS blend has relatively high mechanical properties with the relatively stable micro-structure having nanometer scale dispersed phase.

본 연구에서는 PC/ABS 블렌드를 고속전단성형법을 사용하여 제조하였고 스크류 회전속도와 전단부하시간을 공정 변수로 하여 이에 따른 블렌드의 모폴로지 변화를 분석하였다. 블렌드의 모폴로지 및 ABS 분산상의 크기를 주사전자현미경으로 관찰하여 안정한 상 구조와 최적의 물성을 가지는 고속전단성형조건을 확립하였고, 전단응력에 의한 블렌드의 열화 현상을 알아보기 위해 기계적 물성의 변화를 측정하였다. 이 때, 스크류 회전속도는 500 rpm에서 3000 rpm까지 변화시켰으며 전단부하시간은 10초에서 40초까지 주었다. 고속전단성형법을 사용하여 제조한 PC/ABS 블렌드 및 고속전단성형을 가하지 않은PC/ABS 컴파운드의 분산상 크기를 명확하게 관찰하기 위하여 블렌드의 단면에 크롬산 수용액을 이용한 에칭공정을 시행하였고 공정 전후의 모폴로지를 비교 분석하였다. 에칭으로 생긴 블렌드 내의 ABS 홀을 이미지 측정 프로그램인 Image J를 이용하여 측정한 결과, 스크류 회전속도에 따라 그 크기가 감소하였으며 특히 1000 rpm 이상의 스크류 회전속도 하에서 제조된 PC/ABS 블렌드의 경우, 기계적 물성이 급격하게 감소하여 블렌드의 분해가 일어났음을 알 수 있었다. 결과적으로 PC/ABS 블렌드에 1000 rpm의 스크류 회전속도를 가한 경우, 나노미터 단위의 분산상을 가지며 가장 안정한 상구조를 관찰할 수 있었고 인장강도 및 신율도 상대적으로 높아서 PC/ABS 블렌드의 최적 고속전단성형조건이라 할 수 있다.

Keywords

References

  1. Utracki, L. A., "Polymer Alloys and Blends," Handbook of Polym Sci and Technol., 121-201(1989).
  2. Zuber, M., Tabasum, S., Hussain, R., Khan, M. B. and Bukhari, I. H., "Blends of Polyurethane-polymethyl Methacrylate/$TiO_2$-based Composites," Korean J. Chem. Eng., 30(8), 1652-1658(2013). https://doi.org/10.1007/s11814-013-0111-y
  3. Huh, W. Y., Yun, D. G. and Song, K. C., "Preparation of Conductive Coating Solutions by Blending Waterborne Acrylic Polyurethane Dispersion with Carbon Nanotube," Korean Chem. Eng. Res., 51(1), 73-79(2013). https://doi.org/10.9713/kcer.2013.51.1.73
  4. Cruz, C. A., Barlow, J. W. and Paul, D. R., "The Basis for Miscibility in Polyester-polycarbonate Blends," Macromol., 12(4), 726-731 (1979). https://doi.org/10.1021/ma60070a038
  5. Favis, B. D. and Therrien, D., "Factors Influencing Structure Formation and Phase Size in an Immiscible Polymer Blend of Polycarbonate and Polypropylene Prepared by Twin-screw Extrusion," Polym., 32(8), 1474-1481(1991). https://doi.org/10.1016/0032-3861(91)90429-M
  6. Khan, M. M. K., Liang, R. F., Gupta, R. K. and Agarwal, S., "Rheological and Mechanical Properties of ABS/PC Blends," Korea-Australia Rheol. J., 17(1), 1-7(2005).
  7. Jan, R., Ralf, L., Wolfgang, G., Monika, L., Miroslav, S., Zdenek, K., Evgenyl, A. and Jiri, H., "Ternary PC/ABS/PMMA Blends-Morphology and Mechanical Properties Under Quasi-static Loading Conditions," Polym., 57(2), 87-94(2012).
  8. Ibrahim, B. A. and Kadum, K. M., "Influence of Polymer Blending on Mechanical and Thermal Properties," Mod. Appl. Sci., 4(9), 157-161(2010).
  9. Suarez, H., Barlow, J. W. and Paul, D. R., "Mechanical Properties of ABS/Polycarbonate Blends," J. Appl. Polym. Sci., 29(11), 3253-3259(1984). https://doi.org/10.1002/app.1984.070291104
  10. Hong, J. H., Song, K. H., Lee, H. G., Han, M. S., Kim, Y. H. and Kim, W. N., "Morphological, Mechanical and Rheological Properties of Poly(acrylonitrile-butadiene-styrene)/polycarbonate/poly(${\varepsilon}$-caprolactone) Ternary Blends," Macromol. Res., 15(6), 520-526 (2007). https://doi.org/10.1007/BF03218825
  11. Lombardo, B. S., Keskkula, H. K. and Paul, D. R., "Influence of ABS Type on Morphology and Mechanical Properties of PC/ ABS Blends," J. Appl. Polym. Sci., 54(11), 1697-1720(1994). https://doi.org/10.1002/app.1994.070541113

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