Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of TESPT Silane Coupling Agent on Mechanical Properties of Precipitated Silica Filled NBR Compound for Oil Seal

TESPT 실란커플링제가 침전 실리카로 보강된 오일씰용 NBR복합소재의 기계적 물성에 미치는 영향

  • Received : 2010.12.29
  • Accepted : 2011.01.17
  • Published : 2011.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

The effect of the silane coupling agent, bis(triethoxysilypropyl)tetrasulfide (TESPT), on mechanical properties of a silica-filled NBR compound for oilseal was investigated. Curing behavior and crosslinking density of the compounds were measured using ODR (oscillating disk rheometer) and swelling ratio in toluene. UTM (universal testing machine) and shore A hardness tester were used in order to study the characteristics of mechanical properties of original vulcanizates and aged ones with heated air and ASTM No. 3. oil. Recovery of elasticity which influences the performance and service life of oilseal was investigated by giving bending deformation to vulcanizates in aging condition. After bending aging test, recovery distance was measured and calculated angle of recovery from it. TR (temperature retraction) test was performed on these vulcanizates to determine the low temperature recovery behavior. Wear resistance was measured by Taber type abrasion tester. In addition, SEM was used to characterize the morphology of the worn surface of vulcanizates. The result showed that addition of TESPT into silica-filled compound improves not only compound flow-ability, interaction between NBR and silica and crosslinking density, but also hardness, 100% modulus, recovery of elasticity, wear resistance, heat resistance and ASTM No.3 oil resistance of vulcanizates.

실란커플링제인 bis-(3-triethoxysilpropyl)tetrasulfide (TESPT)가 실리카 충전 오일씰용 NBR 복합소재의 물성에 미치는 영향에 대하여 연구하였다. 복합소재의 가교거동과 가교밀도는 ODR (oscillating disk rheometer)과 톨루엔 팽윤비 시험을 통하여 측정하였으며, 기계적 물성은 가황물을 공기 내열 노화 및 ASTM No.3 oil에 내유 노화시켜 시험 전 후 값을 UTM (universal testing machine)과 Shore A 경도계를 사용하여 측정하였다. 오일씰의 성능과 수명에 큰 영향을 미치는 복합소재의 탄성회복은 가황물에 굽힘 변형을 주어 노화시킨 후 시편이 회복되는 길이를 측정하여 회복 각(angle of recovery)을 계산하였으며, 저온에서의 탄성회복거동은 TR (temperature retraction) 시험을 통하여 측정하였다. 또한, Taber식 마모시험기를 사용하여 가황물의 내마모성을 측정하고 SEM(scanning electron microscope)을 사용하여 마모면의 형상을 관찰하였다. 시험결과 실리카가 충전된 복합물에 TESPT가 첨가되면 복합물의 흐름성이 향상되고 실리카와 NBR 간의 상호작용 및 가황물의 가교밀도가 향상되어 가황물의 경도, 100% 모듈러스, 탄성회복성, 내마모성, 내열노화성 및 ASTM No.3 오일에 대한 내유성이 향상됨을 알 수 있었다.

Keywords

References

  1. R. P. Lattimer, R. E. Harris, and C. K. Rhee, "Identification of Organic Additives in Rubber Vulcanizates Using Mass Spectrometry", Anal. Chem., 58, 3188 (1986). https://doi.org/10.1021/ac00127a059
  2. J. B. Donnet, W. D. Wamg, and A. Vidal, Carbon, 32, 199 (1994). https://doi.org/10.1016/0008-6223(94)90183-X
  3. "What is Carbon Black", Iternational Carbon Black Association. http://www.carbon-black.org/what_is.html. Retrieved 2009-04-14.
  4. C. Roy, A. Chaala, and H. Darmstadt, "The vacuum pyrolysis of use tires: End-uses for oil and carbon black products", Journal of Analytical and Applied Pyrolysis, 51, 201 (1999). https://doi.org/10.1016/S0165-2370(99)00017-0
  5. S. Wolff, "Chemical Aspects of Rubber Reinforcement by Filler", Rubber Chem. Technol., 69, 325 (1996). https://doi.org/10.5254/1.3538376
  6. 박성수, 박병호, 송기찬, 김수경, "실리카 및 카본블랙이 충전 된 고무 가황물에서 배합방법이 파열 특성에 미치는 영향", Polymer(Korea), 24, 220 (2000).
  7. S. J. Park, W. B. Park, and J. R. Lee, "Thermal Stabilities and Cure Kinetics of DGEBA / Cycloaliphatic Epoxy Blend System", Polymer, 23, 281 (1999).
  8. A. W. Adamson, "Physical Chemistry of Surface", 5th ed., John Wiley, New York, (1990).
  9. D. M. Schwaber and F. Rodriguez, "Applications of an azide sulfonyl silane as elastomer cross-linking and coupling agent", Rubber Plast. Age, 48, 1081 (1967).
  10. 김광제, "양기능성실란(TESPD)이 실리카함유 복합소제에 미치는 영향", Elastomers and Composites, 44, 134 (2009).
  11. A. Ansarifar, H.P. Lim, and R. Nijhawan, "Assessment of the effect of a bifunctional organosilane on the bound rubber and properties of some natural rubber compounds", Int. J. Adhesion & Adhesives, 24, 10 (2004).
  12. 이종철, 이영석, 하기룡, "Polytetrafluoroethylene 복합소재를 이용한 오일씰 응용에 관한 연구", Elast. Compos., 45, 32 (2010).
  13. B. Dinzbung., "Measurement of Rubber Elasticity and Correlation with Seal Life", SAE TECHNICAL PAPER SERIES, 970547, 3 (1997).
  14. M. P. Wagner, Rubber Chem. Technol., 49, 703 (1976). https://doi.org/10.5254/1.3534979
  15. 장중희, 최성신, "NR, SBR, BR 가황물의 원형 변형으로부터의 회복 거동", Elast. Compos., 44, 442 (2009).