Effects of Temperature and Curing Systems on Compression Set of NR Compounds at Constant Load

천연고무의 일정 하중 영구압축률에 대한 온도와 가교 시스템의 영향

  • Jin, Hyun-Ho (Department of Advanced Chemicals, Chonnam National University) ;
  • Hong, Chang-Kook (Center for Functional Nano Fine Chemicals (BK21)) ;
  • Cho, Dong-Lyun (School of Applied Chemical Engineering, Chonnam National University) ;
  • Kaang, Shin-Young (School of Applied Chemical Engineering, Chonnam National University)
  • 진현호 (전남대학교 신화학소재공학과) ;
  • 홍창국 (기능성 나노 신화학소재 사업단(BK21)) ;
  • 조동련 (전남대학교 응용화학공학부) ;
  • 강신영 (전남대학교 응용화학공학부)
  • Published : 2009.03.30

Abstract

The effects of temperature and curing systems on the compression set of natural rubber (NR) at constant load were investigated. NR was compounded with various amounts of sulfur and DCP in order to obtain various crosslink densities and curing systems. Compression sets at constant load were compared with those at constant strain. Compression set at constant load was more affected by changes in crosslink density than compression set at constant strain, due to the differences of exerted strain energy density. Compression set of sulfur cured NR under constant load was increased with increasing load and temperature, but the compression set of DCP cured NR was not changed by increasing load and temperature.

References

  1. J. A. Shaw, A. S. Jones, and A. S. William, 'Chemorheological Response of Elastomers at Elevated Temperature: Experiment and Simulations', J. Mech. Phys. Solids, 53, 2758 (2005) https://doi.org/10.1016/j.jmps.2005.07.004
  2. C. Joubert, A. Michel, L. Choplin, and P. Cassagnau, 'Influence of the Crosslink Network Structure on Stress-Relaxation Behavior: Viscoelstic Modeling of the Compression Set Experiment', J. Polym. Sci., 41, 1779 (2003) https://doi.org/10.1002/polb.10530
  3. A. N. Gent, 'Elasticity' in 'Engineering with Rubber: How to Design Rubber Components', ed. by A. N. Gent, Hanser Publishers, New York, 1992
  4. L. Gonzalez, A. Rodriguez, A. Marcos-Fernandez, J. L. Valentin, and A. Fernandez-Torres, 'Effect of Network Heterogeneities on the Physical Properties of Nitrile Rubbers Cured with Dicumyl Peroxide', J. Appl, Polym. Sci., 103, 3377 (2007) https://doi.org/10.1002/app.24696
  5. P. J. Flory and J. Rehner, J. Chem. Phys., 11, 521 (1943) https://doi.org/10.1063/1.1723792
  6. S. Toki, I. Sics, S. Ran, L. Liu, and B. S. Hsiao, 'Molecular Orientation and Structural Development in Vulcanized Polyisoprene Rubbers during Uniaxial Deformation by in Situ Synchrotron X-ray Diffraction', Polymer, 44, 6003 (2003) https://doi.org/10.1016/S0032-3861(03)00548-2
  7. Sung-Hyo Chough and Dong-Ho Chang, 'Kinetics of Sulfur Vulcanization of NR, BR, SBR, and Their Blends Using a Rheometer and DSC', J. Appl. Polym. Sci., 61, 449 (1996) https://doi.org/10.1002/(SICI)1097-4628(19960718)61:3<449::AID-APP7>3.0.CO;2-I
  8. S. K. Bhatnagar and S. Banerjee, 'Cross-link Efficiency of Styrene-Butadiene Rubber with Dicumyl Peroxide and Evaluation of Interaction Parameter', Die Makromolekulare Chemie, 109, 217 (1967) https://doi.org/10.1002/macp.1967.021090119
  9. I. Franta, 'Elastomers and Rubber Compounding Materials', Elsevier, NY, 1989