Effect of Screw Speed on the Mechanical Properties and Morphology of Polyurethane/Nylon 66 Blend

폴리우레탄/나일론 66 블렌드 제조시 스크류 속도 변화에 따른 기계적 물성 및 모폴로지에 관한 연구

  • Chun Byoung-Chul (Department of Polymer Engineering, The University of Suwon) ;
  • Chong Mi-Hwa (Department of Polymer Engineering, The University of Suwon) ;
  • Cho Tae-Keun (Department of Polymer Engineering, The University of Suwon) ;
  • Chung Yong-Chan (Department of Chemistry, The University of Suwon, Intelligent Texile Research Center)
  • 전병철 (수원대학교 신소재공학과) ;
  • 정미화 (수원대학교 신소재공학과) ;
  • 조태근 (수원대학교 신소재공학과) ;
  • 정용찬 (수원대학교 화학과 지능형 텍스타일 연구센터)
  • Published : 2006.06.01

Abstract

Incompatible blend of polyurethane(PU) and nylon 66 was prepared from melt mixing method utilizing twin screw extruder, and screw speed was changed to enhance the compatibility of the blend. Tensile, impact, thermal properties were measured to evaluate the effect of screw speed change on the mechanical properties. Also morphological and structural behavior were analyzed from XRD and SEM. As the screw speed increased, the dispersed phase particle size decreased and the degree of dispersion improved, and resulted in an improved tensile and impact strength. More specifically, tensile strength of 25 wt% PU/75 wt% nylon 66 blend was 38.1 MPa at the screw speed of 100 rpm, and it increased to 50.3 MPa at 400 rpm. Strain at break of 75 wt% PU/25 wt% nylon 66 blend increased from 64.9% at 100 rpm to 141.7% at 400 rpm, thus showed more than 100% increase in strain at break. Impact strength of 50 wt% Pu/ 50 wt% nylon 66 and 25 wt% PU/75 wt% nylon 66 blend also showed a slight increase with the screw speed increase.

Keywords

References

  1. L. A. Utracki, 'Melt Flow of Polymer Blend', Polym Eng Sci, 2004, 23, 602-609 https://doi.org/10.1002/pen.760231103
  2. D. R. Paul and J. W. Barlow, 'Polymer Blend', J Macromol Sci Rev Macromol Chem, 1980, C18, 109-168
  3. O. Olabisi, L. M. Robeson, and M. T. Shaw, 'Polymer-Polymer Miscibility', Academic Press, NY, 1979, pp. 138-142
  4. N. G. Gaylord in 'Copolymers, Polyblends, and Composites: A Symposium' (N. A. J. Platzer Ed.), American Chemical Society, Washington, 1975, pp. 56-58
  5. G. Oertel, 'Polyurethane Handbook', 2nd Ed., Hanser, Munich, 1993, pp. 268-270
  6. B. Bengtson, C. Feger, W. J. Macknight, and N. S. Schneider, 'Thermal and Mechanical Properties of Solution Polymerized Segmented Polyurethanes with Butadiene Soft Segment', Polymer, 1985, 26, 895-900 https://doi.org/10.1016/0032-3861(85)90134-X
  7. J. L. Han, S. M. Tseng, J. H. Mai, and K. H. Hsieh, 'Polyurethane-Crosslinked Epoxy Resins. I. Mechanical Behavior', Angew Makrom Chem, 2003, 182, 193-203 https://doi.org/10.1002/apmc.1990.051820114
  8. P. M. Stefani, S. M. Moschiar, and M. I. Aranguren, 'Polyurethane-Ductilized Epoxy Resins', J Appl Polym Sci, 1998, 68, 1781-1789 https://doi.org/10.1002/(SICI)1097-4628(19980613)68:11<1781::AID-APP9>3.0.CO;2-F
  9. T. Nishi and T. T. Wang, 'Melting Point Depression and Kinetic Effects of Cooling on Crystallization in Poly (vinylidene fluoride)-Poly(methyl methacrylate) Mixtures', Macromolecules, 1975, 8, 909-915 https://doi.org/10.1021/ma60048a040
  10. Y. Aoki and M. Watanabe, 'Morphological, Thermal, and Rheological Properties of Nylon/acrylonitrile-butadienestyrene Alloys', Polym Eng Sci, 1992, 32, 878-885 https://doi.org/10.1002/pen.760321307
  11. S. H. Hwang, Y. C. Lee, J. C. Jung, and S. W. Lee, 'The Study on Thermal, Spectroscopic, and Morphological Properties of Poly(ethylene oxide) and Polyglutarimide Blend System', Polymer(Korea), 1997, 21, 262-269
  12. G. Banhegyi, F. E. Karasz, and Z. S. Petrovic, 'Dielectric Relaxation Properties in Polypropylene-Polyurethane Composites', J Appl Polym Sci, 1990, 40, 435-452 https://doi.org/10.1002/app.1990.070400312
  13. J. R. Quay, Z. Sun, J. Blackwell, R. M. Briber, and E. L. Thomas, 'The Hard Segment Unit Cell for MDI-BDO-based Polyurethane Elastomers', Polymer, 1990, 31, 1003-1008 https://doi.org/10.1016/0032-3861(90)90244-S
  14. T. Takahashi, N. Hayashi, and S. Hayashi, 'Structure and Properties of Shape-Memory Polyurethane Block Copolymers', J Appl Polym Sci, 1996, 60, 1061-1069 https://doi.org/10.1002/(SICI)1097-4628(19960516)60:7<1061::AID-APP18>3.0.CO;2-3
  15. C. Sirisinha, S. B. Limcharoen, and J. Thunyarittikorn, 'Relationships Among Blending Condition, Size of Dispersed Phase, and Oil Resistance in Natural Rubber Blends', J Appl Polym Sci, 2001, 82, 1232-1237 https://doi.org/10.1002/app.1957
  16. R. J. M. Borggreve and R. J. Gaymans, 'Impact Behaviour of Nylon-rubber Blends: 4. Effect of the Coupling Agent, Maleic Anhydride', Polymer, 1989, 30, 63-70 https://doi.org/10.1016/0032-3861(89)90384-4
  17. R. J. M. Borggreve, R. J. Gaymans, and J. Schuijer, 'Impact Behaviour of Nylon-rubber Blends: 5. Influence of the Mechanical Properties of the Elastomer', Polymer, 1989, 30, 71-77 https://doi.org/10.1016/0032-3861(89)90385-6
  18. R. J. M. Borggreve, R. J. Gaymans, and H. M. Eichenwald, 'Impact Behaviour of Nylon-rubber Blends: 6. Influence of Structure on Voiding Processes; Toughening Mechanism', Polymer, 1989, 30, 78-83 https://doi.org/10.1016/0032-3861(89)90386-8
  19. S. Wu, 'Formation of Dispersed Phase in Incompatible Polymer Blends: Interfacial and Rheological Effects', Polym Eng Sci, 1987, 27, 335-343 https://doi.org/10.1002/pen.760270506